7750 SR, 7450 ESS, 7950 XRS, and VSR acronyms

1DM

One-way Delay Measurement

6PE

IPv6 Provider Edge router. An MPLS IPv4 core network that supports IPv6 domains which communicate over an IES service.

6VPE

IPv6 Provider Edge router with IP-VPN Services. An MPLS IPv4 core network that supports the communication using IPv6 VPRN services.

2G

Second-generation wireless telephone technology

3DES

Triple DES (data encryption standard)

3G

Third-generation mobile telephone technology

4G

Fourth-generation mobile telephone technology

5G

Fifth-generation mobile telephone technology

NSP NFM-P

Network Services Platform Network Functions Manager - Packet

1830 PSS

1830 Photonic Service Switch

1850 TSS-5

1850 Transport Service Switch

7705 SAR

7705 Service Aggregation Router

7210 SAS

7210 Service Access Switch

7450 ESS

7450 Ethernet Service Switch

7705 SAR

7705 Service Aggregation Router

7750 SR

7750 Service Router

7950 XRS

7950 eXtensible Routing System

A/A

Active/Active redundancy mode

AA

Application Assurance

AA-ISA

Application Aware Integrated Service Adapter

AAA

AA-Answer

AAR

AA-Request

AARP

AA Redundancy Protocol

ABM

Asynchronous Balanced Mode

ABR

Area Boundary Router

Available Bit Rate

AC

Alternating Current

Attachment Circuit

ACA

Accounting-Answer

ACCM

Async-Control-Character-Map

ACFC

Address and Control Field Compression

ACH

Associated Channel

ACK

Acknowledgment

ACL

Access Control List, also called filter policy

ACPI

Advanced Configuration and Power Interface

ACR

Accounting-Request

Adaptive Clock Recovery

AD

Autodiscovery

ADC

Application Detection and Control

ADI

Ad Insertion

ADI-LZ

Ad Insertion Local and Zoned

ADM

Add/Drop Multiplexer

ADP

Active Diameter Proxy

Automatic Discovery Protocol

AF

Assured Forwarding

AFI

Address Family Identifier

Authority and Format Identifier

AFTR

Address Family Transition Router

AGI

Address Group Identifier

AG

Application Group

AH

Authentication Header

AIGP

Accumulated IGP

AII

Attachment Individual Identifier

AIS

Alarm Indication Signal

ALE

Access-Loop-Encapsulation

ALG

Application Layer Gateway

ALMP

Auto-Learn-Mac-Protect

ALTO

Application Layer Traffic Optimization

AMBR

Aggregate Maximum Bit Rate

AMI

Alternate Mark Inversion

AMO

Any Mode of Operation

AN

Association Number

ANSI

American National Standards Institute

ANCP

Access Node Control Protocol

ANL

Access Network Location

AP

Access Point

API

Application Programming Interface

APIC

Advanced Programmable Interrupt Controller

APN

Access Point Name

APS

Automatic Protection Switching

AQP

Application QoS Policies

AR

Assisted Replication

ARP

Address Resolution Protocol

Allocation and Retention Priority

A/S

Active/Standby

Active/Standby redundancy mode

AS

Autonomous System

ASAP

Any Service Any Port

ASAM

Advanced Services Access Manager

ASBR

AS Boundary Routers

ASID

Acct-Session-Id

ASL

Application Specific License

ASLA

Application Specific Link Attributes

ASLM

Application Specific License Manager

ASM

Any-Source Multicast

ASN

Autonomous System Number

ASO

Application Service Option

ASPM

Active State Power Management

AU

Administrative Unit

AVC

Aggregated Virtual Circuit

AVP

Attribute Value Pair

B-bit

Beginning bit (first packet of a fragment)

BBF

Broadband Forum

BC

Bandwidth Constraint

BCB

Backbone Core Bridge

BCG

Burst Control Group

BCP

Bridging Control Protocol

B-DA

Backbone Destination MAC Address

BE

Best Effort

BEB

Backbone Edge Bridge

BECN

Backward Explicit Congestion Notification

Bellcore

Bell Communications Research

BER

Basic Encoding Rules

BER

Bit Error Rate

BERT

Bit Error Rate Test

BFD

Bidirectional Forwarding Detection

BFER

Bit Forwarding Egress Router

BFIR

Bit Forwarding Ingress Router

BFR

Bit Forwarding Router

BGP

Border Gateway Protocol

BGP LU

BGP Labeled Unicast

BGP-LS

BGP Link State

BIER

Bit Indexed Explicit Replication

BIFT

Bit Index Forwarding Table

BITS

Building Integrated Timing Source

Building Integrated Timing Supply

BM

Broadcast/Multicast

B-MAC

Backbone source and destination MAC address fields defined in the 802.1ah provider MAC encapsulation header

BTCA

Best TimeTransmitter Clock Algorithm

BMP

BGP Monitoring Protocol

BMR

Basic Mapping Rule

BMU

Broadcast, Multicast, and Unknown traffic

BNG

Broadband Network Gateway

BOF

Boot Options File

BOOTP

Bootstrap Protocol

BPDU

Bridge Protocol Data Unit

BR

Border Router

BRAS

Broadband Remote Access Server

BRE

Basic Regular Expression

BRG

Bridged Residential Gateway

BSA

Broadband Service Aggregator

BSAN

Broadband Service Access Node

BSC

Base Station Controller

BSD

Berkeley Software Distribution

BSL

Bit String Length

BSM

Basic Subscriber Management

BSR

Bootstrap Router

Broadband Service Router

BT

Burst Tolerance

BTAG

Backbone Tag

BTS

Base Transceiver Station

BTSH

BGP TTL Security Hack

BTV

Broadcast Television

BUM

Broadcast, Unicast unknown and Multicast

B-VPLS

Backbone VPLS

BVID

Backbone VLAN ID

BVPLS

See B-VPLS

BVS

Business VPN Service

BW

Bandwidth

BW-NR

Bandwidth 5G New Radio

CA

Certificate Authority

Connectivity Association

CAC

Call Admission Control

CAK

Connectivity Association Key

CAM

Content Addressable Memory

CAS

Channel Associated Signaling

CBAM

Cloudband Application Manager

CBC

Cipher Block Chaining

CBF

Class-Based Forwarding

CBR

Constant Bit rate

CBS

Committed Buffer Size

Committed Buffer Space

Committed Burst Size

CC

Content of Communication

Continuity Check

Control Channel

CCA

Credit Control Answer

Cross Connect Adapter

CCA-I

Credit Control Answer-Initial

CCA-T

Credit Control Answer-Terminate

CCA-U

Credit Control Answer-Update

CCAG

Cross Connect Aggregation Group

CCFH

Credit Control Failure Handling

CCI

Credit Control Instance

CCID

Cross Connect Identifier

CCM

Chassis Control Module

Continuity Check Message

CCR

Credit Control Request

CCR-I

Credit Control Request-Initiate

CCR-T

Credit Control Request-Terminate

CCR-U

Credit Control Request-Update

CCS

Common Channel Signaling

CDN

Call Disconnect Notify

Content Delivery Network

CDP

Cisco Discovery Protocol

CDVT

Cell Delay Variation Tolerance

CE

Circuit Emulation

Customer Edge

Customer Equipment

CEA

Capability Exchange Answer

CEC

Circuit Emulation Concentrator

CEM

Circuit-Emulation

CER

Capability Exchange Request

CES

Circuit Emulation Services

CESoPSN

Circuit Emulation Services over Packet Switched Network

CF

Compact Flash

CFHP

Class Fair Hierarchical Policing

CFM

Connectivity Fault Management

Control Forwarding Module

CFP

C form-Factor Pluggable

CG

Charging Groups

CGA

Cryptographically Generated Address

CGI

Cell Global Identification

CGN

Carrier Grade NAT

CHAP

Challenge Handshake Authentication Protocol

CHLI

Consecutive High Loss Intervals

CIDR

Classless Inter-Domain Routing

CIR

Committed Information Rate

CIST

Common and Internal Spanning Tree

CKN

Connectivity association Key Name

CLEI

Common Language Equipment Identification

CLI

Command Line Interface

CLLI

Common Language Location Identifier

CLM

Centralized License Manager

CLP

Cell Loss Priority

CMA

Compact Media Adapter

C-MAC

Customer MAC

CMP

Certificate Management Protocol

CMTS

Cable Modem Termination System

CMV

Cryptographic Module version

CN

Common Name

CNF

Container Network Function

CO

Central Office

CoA

Change of Authorization

confed-EBGP

Confederation External BGP

CoS

Class of Service

CP

Connection-Profile

CPE

Customer Premises Equipment

CPF

Control Plane Function

Cpipe

Circuit Emulation Pipe

CPM

Control Processing Module

CP/SFM

Control Processor/Switch Fabric Module

CPU

Control Processing Unit

CRC

Cyclic Redundancy Check

CRC-32

32-bit Cyclic Redundancy Check

CRL

Certificate Revocation List

CRMF

Certificate Request Message Format

CRON

a time-based scheduling service (from chronos = time)

CRP

Candidate RP

CSC

Carrier Supporting Carrier

CSC-CE

Carrier Supporting Carrier – Customer Edge Router

CSC-PE

Carrier Supporting Carrier – Provider Edge Router

CSF

Client Signal Fail

CSM

Control and Switching Module

CSN

Complete Sequence Number

CSNP

Complete Sequence Number PDU

CSP

Cloud Service Provider

CSPF

Constraint-based Shortest Path First

CSR

Cellsite Service Router

CSU

Channel Service Unit

CSV

Certificate Status Verification

CT

Class Type

C-TAG

Customer VLAN tag

CUPS

Control and User Plane Separation

CV

Connection Verification

Customer VLAN (tag)

CVID

Customer VLAN ID

CW

Control Word

CWR

Congestion Window Reduced

DA

Destination Address

DACS

Digital Access Cross-connect System

DAD

Duplicate Address Detection

DC

Direct Current

Data Center

DCCA

Diameter Credit Control Application

DCD

Data Carrier Detect

DCE

Data Circuit-terminating Equipment

Data Communications Equipment

DCGW

Data Center Gateway

DCI

Data Center Interconnect

DCN

Data Communication Network

DCP

Distributed CPU Protection

DCSC

Digital Channel Switch Capable

DDM

Digital Diagnostics Monitoring

DDMAP

Downstream Detailed Mapping

DDoS

Distributed DoS

DDP

Dynamic Data Persistency

DDS

Dynamic Data Services

DE

Discard-Eligible

DEM

Dynamic Experience Management

DES

Data Encryption Standard

DEI

Drop Eligibility Indicator

DER

Distinguished Encoding Rules

DF

Designated Forwarder

Delivery Function

Do not Fragment

DGW

Data Center Gateway

DH

Diffie-Hellman

DHB

Decimal, Hexadecimal, or Binary

DHCP

Dynamic Host Configuration Protocol

DHCPv4

Dynamic Host Configuration Protocol for IPv4

DHCPv6

Dynamic Host Configuration Protocol for IPv6

DHT

Distributed Hash Protocol

DL

Data Link

DLC

Data Link Control

DLCI

Data Link Connection Identifier

DLCMI

Data Link Connection Management Interface

DM

Delay Measurement

DMA

Direct Memory Access

DMM

Delay Measurement Message

DMR

Delay Measurement Reply

Default Mapping Rule

DMZ

Demilitarized Zone

DN

Domain Name

DNAT

Destination-based Network Address Translation

DNS

Domain Name System

DNSSEC

DNS Security

DNU

Do Not Use

DOD

Downstream On Demand

DORA

Discovery/Offer/Request/Ack

DoS

Denial of Service

dot1p

IEEE 802.1p bits, in Ethernet or VLAN ingress packet headers, used to map traffic to up to eight forwarding classes

dot1q

IEEE 802.1q encapsulation for Ethernet interfaces

DP

Don’t Preempt Me Bit

Data Plane

DPA

Disconnect Peer Answer

DPD

Dead Peer Detection

DPDK

Datapath Development Kit

DPI

Digital Program Insertion

DPL

Delegated Prefix Length

DPLL

Digital Phase Locked Loop

DPR

Disconnect Peer Request

DPV

Designated Priority Vector

DR

Designated Router

DRA

Diameter Routing Agent

DRM

Digital Rights Management

DS

Dual-Stack

DSA

Digital Signal Algorithm

Direct System Agent

DSAP

Destination Service Access Point

DSCP

Differentiated Services Code Point

DSFS

Data SAP Forwarding State

DSL

Digital Subscriber Line

DSLAM

Digital Subscriber Line Access Multiplexer

DS-LITE

Dual Stack Lite

DSM

Distributed Subscriber Management

DSMAP

Downstream Mapping

DSS

Data Sequence Signal

Digital Signature Standard

DT

Data Trigger

DTA

Data Triggered Authentication

DTC

DHCP Transaction Cache

DTD

Dynamic Topology Discovery

DTE

Data Terminal Equipment

DTLS

Datagram Transport Layer Security

DTP

Digital Trunking Protocol

DU

Downstream Unsolicited

DUID

DHCP Unique Identifier

DUS

Do not Use for Synchronization

DVB

Digital Video Broadcasting

DVMRP

Distance Vector Multicast Routing Protocol

DWA

Device Watchdog Answer

DWDM

Dense Wavelength Division Multiplexing

DWR

Device Watchdog Request

e2e

End-to-End

EA

Embedded Address

EAP

Extensible Authentication Protocol

EAPOL

EAP over LAN

E-bit

Ending bit (last packet of a fragment)

EBGP

External Border Gateway Protocol

EBS

Error Burst Size

E-BSR

Elected BSR

EC

Extended Community

ECE

ECN-Echo

ECID

Emulated Circuit Identifiers

ECGI

E-UTRAN Cell Global Identifier

ECMP

Equal Cost Multipath

ECN

Explicit Congestion Notification

ECT

Equal Cost Tree

ED

Endpoint Discriminator

EEPROM

Electronically Erasable Programmable Read-Only Memory

EF

Expedited Forwarding

EFCI

Explicit Forward Congestion Indication

EFEC

Enhanced Forward Error Correction

EFH

Extended Failure Handling

EFM

Ethernet in the First Mile

EG

Enterprise Gateway

EGP

Exterior Gateway Protocol

EHS

Event Handling System

EIC

Ethernet Interface Counters

EIGRP

Enhanced Interior Gateway Routing Protocol

EIR

Excess Information Rate

EL

Entropy Label

E-LAN

Ethernet Local Area Network

eLER

Egress Label Edge Router

ELI

Entropy Label Indicator

E-Line

Ethernet Virtual Private Line

E-LMI

Ethernet Local Management Interface

EMR

Efficient Multicast Replication

EMS

Enhanced Subscriber Management

eNB

Evolved Node B

EOOL

End of Options List

EOM

End-of-Message

EOR

End-of-RIB

EPC

Evolved Packet Core

EPD

Exponential Port Dampening

Epipe

Ethernet Pipe

Ethernet VLL

EPL

Ethernet Private Line

EPS

Equipment Protection Switching

ERE

Extended Regular Expression

ERO

Explicit Route Object

ERP

Ethernet Ring Protection

ES

Elementary Stream

ESA

Extended Services Appliance

ESF

Extended Super Frame

ESI

Ethernet Segment Identifier

ESM

Enhanced Subscriber Management

ESMC

Ethernet Synchronization Messaging Channel

eSNI

Encrypted Server Name Indication

ESP

Encapsulating Security Payload

ESR

Extended Services Router

ESV

Entropy Source version

ETE

End-to-End

ETH

Ethernet

ETH-BN

Ethernet Bandwidth Notification

ETH-CFM

Ethernet Configuration and Fault Management

Ethernet Connectivity Fault Management (IEEE 802.1ag)

ETH-TST

Ethernet Test

ETR

Extended Temperature Range

ETSI

European Telecommunications Standards Institute

ETYPE

EtherType

EUI-64

64-bit Extended Unique Identifier

EVC

Ethernet Virtual Connections

EVI

EVPN Instance

EVPL

Ethernet Virtual Private Link

EVPN

Ethernet VPN

EXEC

Execute

EXP bits

Experimental bits (currently known as TC)

FAP

Femto Access Point

FAD

Flexible Algorithm Definition

FAQ

Frequently Asked Questions

FASTE

FastE SFP type

FC

Forwarding Class

FCC

Fast Channel Change

FCS

Frame Check Sequence

FD

Frame Delay

Frequency Diversity

FDB

Forwarding Database

FDDI

Fiber Distributed Data Interface

FDI

Forward Defect Indication

FDL

Facilities Data Link

FDR

Frame Delay Range

FE

Fast Ethernet

FEAC

Far-End Alarm and Control

FEBE

Far-End Block Error

FEC

Forwarding Equivalence Class

Forward Error Correction

FECN

Forward Explicit Congestion Notification

FENT

Fast Ethernet Network Termination

FEPL

Far-End Protection-Line

FF

Fixed Filter

FIB

Forwarding Information Base

FID

Forwarding ID

FIFO

First In, First Out

FIN

Finish Bit Set

FIPS

Federal Information Processing Standards

FIR

Fair Information Rate

FIX

Financial Information eXchange

FLR

Frame Loss Ratio

FMR

Forwarding Mapping Rule

FOM

Figure of Merit

FP

Forwarding Path

Forwarding Plane

FPE

Forwarding Path Extension

FPGA

Field Programmable Gate Array

FPP

Floor Packet Percentage

FPRI

Fine-grained Priority

FQDN

Fully Qualified Domain Name

FQF

Fully Qualified Flows

FRG

Fragmentation bit

FRR

Fast Reroute

FSG

Fate Sharing Group

FSM

Finite State Machine

FT

Fault Tolerant

FTN

FEC-to-NHLFE

FTP

File Transfer protocol

FTTH

Fiber to the Home

FW

Firewall

FWA

Fixed Wireless Access

FXC

Flexible Cross Connect

G-ACh

Generic Associated Channel

GAL

Generic ACH Label

GARP

Gratuitous ARP

GB-MAC

Group BMAC

GBR

Guaranteed Bit Rate

GE

Gigabit Ethernet

GENT

Gigabit Ethernet Network Termination

GFEC

G.709 FEC

GFP

Generic Framing Procedure

GGSN

Gateway GPRS Support Node

GI

Gateway Interface

GID

Global-ID

GigE

Gigabit Ethernet

GIGE

GigE SFP type

GIGX

GigX SFP

gLSP

GMPLS LSP

GMPLS

Generalized Multiprotocol Label Switching

GMR

IGMP Group-specific Membership Report

GMRE

GMPLS Routing Engine

gNMI

gRPC Network Management Interface

gNOI

gRPC Network Operations Interface

GNSS

Global Navigation Satellite System

GOP

Group of Pictures

GPON

Gigabit Passive Optical Network

GPRS

General Packet Radio Service

GPS

Global Positioning System

GR

Graceful Restart

Guaranteed Restoration

GRACE

Graceful restart

GRE

Generic Routing Encapsulation

gRPC

gRPC Remote Procedure Call

GRT

Global Routing Table

GSMP

General Switch Management Protocol

GSU

Granted Service Unit

GTP

GPRS Tunneling Protocol

GTP-U

GPRS Tunneling Protocol - User Plane

GUA

Global Unicast Address

GVRP

GARP VLAN Registration Protocol

HA

High Availability

HAG

Hybrid Access Gateway

HD

High Definition

HDLC

High-level Data Link Control protocol

HEC

Header Error Control

HGW

Home Gateway

HI

Handover Indication

HLI

High Loss Interval

HLR

Home Location Register

HMAC

Hash-based Message Authentication Code

Hash Message Authentication Code

HLE

Home LAN Extension

H-OFS

Hybrid OpenFlow Switch

Hot

HEAT Orchestration Templates

HP

High Priority

H-POL

Hierarchical Policing

H-QoS

Hierarchical Quality of Service

HSDPA

High-Speed Downlink Packet Access

HSDSL

High Speed Digital Subscriber Line

HSI

High Speed Internet

HSMDA

High Scale MDA

HSPA

High-Speed Packet Access

HSQ

High Scale QoS

HSS

Home Subscriber Service

HT

Host Tracking

HTTP

Hyper-Text Transfer Protocol

HTTPS

HTTP Secure

HVDC

High Voltage Direct Current

HVPLS

Hierarchical Virtual Private Line Service

IAD

Integrated Access Device

IAID

Identity Association Identification

IANA

Internet Assigned Numbers Authority

IA-NA

Identity Association for Non-Temporary Addresses

IA-PD

Identity Association for Prefix Delegation

IAPP

Inter Access Point Protocol

IBCP

In-Band Control Plane

IBGP

Interior Border Gateway Protocol

IBN

Isolated Bonding Network

IB-RCC

In-Band Ring Control Connection

ICAP

Internet Content Adaptation Protocol

ICB

Inter-Chassis Backup

ICC

Inter-Card Communication

ITU Carrier Code (ITU-T Y.1730)

ICCN

Incoming Call Connected

ICK

Integrity Connection Value Key

ICL

Inter-Chassis Link

ICMP

Internet Control Message Protocol

ICMPv6

Internet Control Message Protocol for IPv6

ICP

IMA Control Protocol

ICRQ

Incoming Call Request

ICV

Integrity Connection Value

IDi

Identification Indicator (an IKEv2 protocol payload)

IDr

Identification Responder

IDR

Instantaneous Decoding Refresh

IDS

Intrusion Detection System

IDU

InDoor Unit

IE

Information Element

IEEE

Institute of Electrical and Electronics Engineers

I-ES

Interconnect Ethernet-Segment

I-ESI

Interconnect Ethernet Segment Identifier

IES

Internet Enhanced Service

IETF

Internet Engineering Task Force

IFDV

InterFrame Delay Variation

IFF

Inbound FEC Filtering

IFG

Inter-Frame Gap

IGD

Internet Gateway Device

IGH

Interface Group Handler

IGMP

Internet Group Management Protocol

IGP

Interior Gateway Protocol

IGRP

Interior Gateway Routing Protocol

IID

Instance ID

IIH

IS-IS Hello

IKE

Internet Key Exchange

iLDP

Interface Label Distribution Protocol

ILER

Ingress Label Edge Router

ILM

Incoming Label Map

IME

Interface Management Entity

IMEI

International Mobile Equipment Identity

IMEISV

International Mobile Equipment Identity and its Software Version

IMET

Inclusive Multicast Ethernet Tag

IMM

Integrated Media Module

IMPM

Ingress Multicast Path Management

IMSI

International Mobile Subscriber Identification

I/O

Input/Output

IOM

Input/Output Module

IOMMU

I/O Memory Management Unit

IP

Internet Protocol

IP-CAN

IP Connectivity Access Network

IPCC

IP Communication Channel

IP Control Channel

IPFIX

IP Flow Information Export

IPG

Inter-Packet Gap

Ipipe

IP Pipe

IP Interworking VLL

IPL

IP Length

I-PMSI

Inclusive Provider Multicast Service Interface

IPoE

IP over Ethernet

IPS

Intrusion Prevention System

IPsec

IP Security

IPTV

Internet Protocol Television

IPv6

Internet Protocol version 6

IPv6CP

IPv6 Control Protocol

IP-VPN

Internet Protocol Virtual Private Network

IQ

Information/Query

IR

Ingress Replication

IRB

Integrated Routing and Bridging

IRI

Intercept Related Information

ISA

Integrated Service Adapter

ISA-AA

Integrated Service Adapter – Application Assurance

ISAKMP

Internet Security Association and Key Management Protocol

ISAM

Intelligent Services Access Manager

ISID

I-component Service ID

I-Service Instance Identifier

IS-IS

Intermediate System to Intermediate System

ISO

International Organization for Standardization

ISP

Internet Service Provider

ISSU

In-Service Software Upgrade

IST

Internal Spanning Tree

I-TAG

Service Instance TAG

ITU-T

International Telecommunications Union - Telecommunications

IWF

Interworking Function

JID

JabberID

JOLT

Java OnLine Transactions

JP

Join Prune

KAT

Keepalive Timer

KEX

Key Exchange

KPI

Key Performance Indicators

KVM

Kernel-based Virtual Machine

L2TP

Layer 2 Tunneling Protocol

L2W

Layer 2 Wholesale

LA

Level Authority

LAA

Local Address Assignment

LAC

L2TP Access Concentrator

LACP

Link Aggregation Control Protocol

LAG

Link Aggregation Group

L-AIS

Line Alarm Indication Signal

LAN

Local Area Network

LAND

Local Area Network Denial

LB

Label Base

Loopback

LBM

Loopback Message

LBR

Loopback Reply

Loopback Response

LCD

Loss of Cell Delineation

LCM

Life Cycle Management

LCP

Link Control Protocol

LDAP

Lightweight Directory Access Protocol

LDAPS

LDAP over SSL/STL

LDP

Label Distribution Protocol

LDPoRSVP

LDP over RSVP

LDRA

Lightweight DHCPv6 Relay Agent

LER

Label Edge Router

LFA

Loop-Free Alternate

LI

Lawful Intercept

LFI

Link Fragmentation and Interleaving

LIB

Label Information Base

LIF

Loss of IMA Frame

LIG

Lawful Intercept Gateway

LLA

Link Local Address

LLC

Link Layer Control

Logical Link Control

LLDP

Link Layer Discovery Protocol

LLDPDU

Link Layer Discovery Protocol Data Unit

LLF

Link Loss Forwarding

LLGR

Long Lived Graceful Restart

LLID

Loopback Location ID

LM

Loss Measurement

LMM

Loss Measurement Message

LMI

Local Management Interface

LMR

Loss Measurement Response

LMQ

Last Member Query

LNS

L2TP Network Server

LOC

Loss of Continuity

LODS

Link Out of Delay Synchronization

LOF

Loss of Frame

LOP

Loss of Packets

LoR

LDP over RSVP

LOS

Loss of Signal

LoT

Loss of Transmission

Loss of Transport

LP

Low Priority

Local Preference

LPM

Longest Prefix Match

LPN

Label per Next hop

LPP

Label per Prefix

LPT

Logical Port Type

LPT-S

Logical Port Type Subtype

LPT-V

Logical Port Type Value

LQR

Link Quality Report

LR

Labeled Route

LSA

Link-State Advertisement

LSB

Least Significant Bit

LSDB

Link-State Database

LSN

Large-Scale NAT

LSP

Link-State PDU (for IS-IS)

Label Switched Path

LSR

Link-state Request

Label Switching Router

LSU

Link-State Update

LT

Linktrace

LTE

Line Termination Equipment

Long Term Evolution

LTM

Linktrace Message

LTN

LSP ID to NHLFE

LTR

Linktrace Reply

Linktrace Response

LTS

L2TP Tunnel Switching

LUB

Limit Unused Bandwidth

LUDB

Local User Data Base

MA

Maintenance Association

MA-ID

Maintenance Association Identifier

MAC

Media Access Control

MACsec

Media Access Control Security

MAF

Management Access Filter

MAM

Maximum Allocation Model

MAN

Metropolitan Area Network

MANO

Management and Orchestration

MAP-T

Mapping of Address and Port using Translation

MAR

Mobile Aggregation Router

MAT

MAC Address translation

MBB

Make-Before-Break

MBGP

Border Gateway Protocol with Multiprotocol extensions

MBH

Mobile BackHaul

MBR

Maximum Bit Rate

MBS

Maximum Buffer Size

Maximum Burst Size

Media Buffer Space

MBZ

Must Be Zero

MCAST

Multicast

MC-APS

Multichassis Automatic Protection Switching

MC-CTL

Multichassis Control Link

MC-EP

Multichassis Endpoint

MCID

Multicast Connection ID

MC-IPsec

Multichassis IPsec redundancy

MC-LAG

Multichassis Link Aggregation

MCAC

Multicast Connection Admission Control

MCC

Mobile Country Code

MCLT

Maximum Client Lead Time

MCM

MDA Carrier Module

MCR

Mobile Core Router

MC-RING

Multichassis Ring

MCS

Multichassis Synchronization

MD

Maintenance Domain

MD5

Message Digest version 5 (algorithm)

MDA

Media Dependent Adapter

MD-CLI

Model-Driven CLI

MDI

Media Dependent Interface

MDL

Maintenance Data Link

MDT

Multicast Distribution Tree

MDU

Multiple Dwelling Unit

MDX

Media Dependent Interface with crossovers

ME

Maintenance Entity

MED

Multi-Exit Discriminator

MEF

Metro Ethernet Forum

MEG

Maintenance Entity Group

MVPN-to-EVPN Gateway

MEP

Maintenance Association Endpoint

Maintenance Endpoint

MEP-ID

Maintenance Association Endpoint Identifier

MF

More Fragment

MFD

Mean Frame Delay

MFIB

Multicast Forwarding Information Base

MG

Mobile Gateway

MH

Multihoming

MHD

Multihomed Device

MHF

MIP Half Function

MHN

Multihomed Network

MHP

Multihomed Prefix

MHV

Mirror Header Version

MI

Member Identifier

MIB

Management Information Base

MIMP

MC-IPsec Mastership Protocol

MIP

Maintenance Domain Intermediate Point

Maintenance Intermediate Points

MIR

Minimum Information Rate

MKA

MACsec Key Agreement

MLD

Multicast Listener Discovery

MLDP

Multicast Label Distribution Protocol

MME

Mobility Management Entity

MLT

Multilink Trunk

MMRP

Multiple MAC Registration Protocol

MN

Member Number

MNC

Mobile Network Code

MNO

Mobile Network Operator

MO

Managed Object

MoFRR

Multicast-only Fast Reroute

MOP

Maintenance Operational Procedure

MOS

Mean Opinion Score

MP

Merge Point

Multilink Protocol

MPBGP

Multiprotocol Border Gateway Protocol

MPEG

Moving Picture Experts Group

MPLS

Multiprotocol Label Switching

MPLS-TP

Multiprotocol Label Switching - Transport Profile

MPLSCP

Multiprotocol Label Switching Control Protocol

MPTS

Multiprogram Transport Stream

MR

Master Router

Member Report

MRAI

Minimum Route Advertisement Interval

MRB

Maximum Reservable Bandwidth

MRIB

Multicast Routing Information Base

MRLB

Maximum Reservable Link Bandwidth

MRP

Multiservice Route Processor

MRRU

Maximum Received Reconstructed Unit

MRU

Maximum Receive Unit

MSA

Multisource Agreement

MSAN

Multiservice Access Node

MSAP

Managed Service Access Point

MSB

Most Significant Bit

MSC

Mobile Switching Center

MSCC

Multiple Services Credit Control

MSD

Maximum Stack Depth

MSDP

Multicast Source Discovery Protocol

MSDU

MAC Service Data Unit

MSFP

Multicast Switch Fabric Plane

MSISDN

Mobile Station International Subscriber Directory Number

MS-ISM

Multiservice Integrated Services Module

MSK

Master Session Key

MS-PW

Multisegment Pseudowire

MSR

Mobile Service Router

MSS

Multiservice Site

Maximum Segment Size

MST

Multiple Spanning Tree

MSTI

Multiple Spanning Tree Instances

MSTP

Multiple Spanning Tree Protocol

MSTV

Microsoft Television

MTBF

Mean Time Between Failures

MT-ID

Multitopology ID

MTSO

Mobile Telephony Switching Office

MTTR

Mean Time To Repair

MTU

Multitenant Unit

Maximum Transmission Unit

MTU-r

Bridging-capable access device

MUX

Multiplex

M-VPLS

Management Virtual Private Line Service

MVPN

Multicast VPN

MVR

Multicast VPLS Registration

MVRP

Multiple VLAN Registration Protocol

NA

Neighbor Advertisements

NAI

National Access Identifier

NAK

Non-Acknowledgment

NAPT

Network Address and Port Translation

NAPTR

Name Authority Pointer

NAS

Network Access Server

NASREQ

Diameter Network Access Server Requirements

NAT

Network Address Translation

NBMA

Non-Broadcast Multiple Access network

NBNS

NetBios Name Server

NC

Network Class

NCP

Network Control Protocol

NDF

Non-Designated Forwarder

NDP

Neighbor Discovery Protocol

NE

Network Element

NET

Network Entity Title

NetBIOS

Network Basic Input/Output System

NETCONF

Network Configuration Protocol

NFM-P

Nokia Network Functions Manager for Packet

NG-MVPN

Next-Generation Multicast VPN

NGE

Network Group Encryption

NH

Next-Hop

NHG

Next-Hop Group

NHLFE

Next-Hop Label Forwarding Entry

NHOP

Next-Hop

NID

Network Interface Demarcation

NISH

Network Interface Shell

NIST

National Institute of Standards and Technology

NLB-DEM

Non-Location Based DEM

NLPID

Network Level Protocol Identifier

NLRI

Network Layer Reachability Information

NMDA

Network Management Datastores Architecture

NMS

Network Management System

NNI

Network-to-Network Interface

NPA

Network Processor Array

NRT-VBR

Non-Real-Time Variable Bit Rate

NS

Neighbor Solicitation

Nonce Sum

NSAP

Network Service Access Point

NSAPI

Network Service Access Point Identifier

NSH

Next Signaling Hop

NSP

Network Services Platform

NSR

Nonstop Routing

NSSA

Not-So-Stubby Area

NTP

Network Time Protocol

NUMA

Non-uniform Memory Access

NVE

Network Virtualization Edge

NVO

Network Virtualization Overlay

OAM

Operation, Administration and Management

OAMPDU

OAM Protocol Data Units

OC3

Optical Carrier level 3

OCD

Out-of-Cell Delineation

OCS

Online Charging Server

OCSP

Online Certificate Status Protocol

ODSA

On-Demand Subnet Allocation

ODU

Optical channel Data Unit

OF

OpenFlow

OFPAT

OpenFlow Protocol Action Type

OFS

OpenFlow Switch

OID

Object Identifier

OIF

Outgoing Interfaces

OIL

Outgoing Interface List

OISM

Optimized Inter-Subnet Multicast

OK

Operating Kernel

OKC

Opportunistic Key Caching

OLT

Optical Line Termination

OMA

Optical Modulation Amplitude

OMCR

Oversubscribed Multichassis Redundancy

ONT

Optical Network Terminal

OOB

Out-of-Band

OOF

Out-of-Frame

OOP

Out-of-Profile

OPDL

Option Data structure List

OPEX

Operating Expenditure

Operational Expense

OPS

On-Path Support

OPU

Optical Payload Unit

ORF

Outbound Route Filtering

ORR

Optimal Route Reflection

OS

Operating System

OSF

Oversubscription Factor

OSI

Open Systems Interconnection (reference model)

OSICP

OSI Control Protocol

OSINLCP

OSI Network Layer Control Protocol

OSPF

Open Shortest Path First

OSPFIGP

Open Shortest Path First Interior Gateway Protocol

OSPF-TE

OSPF-Traffic Engineering (extensions)

OSS

Operations Support System

OT

Over-Temperature

OTN

Optical Transport Network

OTU

Optical Transport Unit

OUI

Organizationally Unique Identifier

OVA

Open Virtual Application

OVF

Open Virtualization Format

OVS

Open Virtual Switch

OWAMP

One-Way Active Measurement Protocol

OXC

Optical Cross-connect

P2MP

Point-to-Multipoint

P2P

Point-to-Point

PAA

PDN Address Allocation

PADI

PPPoE Active Discovery Initiation

PADO

PPPoE Active Discovery Offer

PADR

PPPoE Active Discovery Request

PADS

PPPoE Active Discovery Session-confirmation

PADT

PPPoE Active Discovery Terminate

PAE

Port Authentication Entities

PAGP

Port Aggregation Protocol

PAP

Password Authentication Protocol

PASTE

Provider Architecture for Differentiated Services and Traffic Engineering

PAT

Program Association Table

PAYG

Pay-As-You-Grow

PBB

Provider Backbone Bridging

PBBN

Provider Backbone Bridge Network

PBF

Policy-Based Forwarding

PBKDF2

Password-Based Key Derivation Function 2

PBO

Packet-Byte-Offset

PBR

Policy-Based Routing

PBT

Port-Based Timestamping

PCAP

Packet Capture

PCC

Path Computation Element Client

PCC

Policy and Charging Control

PCE

Path Computation Element

PCEF

Policy and Charging Enforcement Function

PCEP

Path Computation Element Protocol

PCM

Pulse Code Modulation

PCO

Protocol Configuration Option

PCP

Priority Code Point

Port Control Protocol

Port Control Policy

PCR

Peak Cell Rate

Proprietary Clock Recovery

PCRF

Policy and Rule Charging Function

PCS

Physical Coding Sublayer

PD

Prefix Delegation

PDCP

Packet Data Convergence Protocol

PDN

Packet Data Network

PDP

Packet Data Protocol

Policy Decision Point

PDSN

Packet Data Serving Node

PDU

Protocol Data Units

PDV

Packet Delay Variation

PE

Provider Edge Router

PEA

Provider Edge A

PEB

Provider Edge B

PE-rs

Provider Edge Router (routing and bridging capable)

PEAP

Protected EAP

PEG

PIM-to-EVPN Gateway

PEP

Policy Enforcement Point

PEM

Privacy Enhanced Mail

PES

Packetized Elementary Stream

PESQ

Perceptual Evaluation of Speech Quality

PFC

Protocol Field Compression

PFCP

Packet Forwarding Control Protocol

PFS

Perfect Forward Secrecy

PFSG

Pool Fate Sharing Group

PG-ID

Protect Group ID

PGW

PDN Gateway

PHB

Per-Hop Behavior

PHP

Penultimate Hop Popping

PHY

Physical layer

PIC

Prefix Independent Convergence

PID

Packet Identifier

Protocol Identifier

PIM

Protocol Independent Multicast

PIM-DM

Protocol Independent Multicast-Dense Mode

PIM-SM

Protocol Independent Multicast – Sparse Mode

PIO

Prefix Information Option

PIP

Picture-in-Picture

PIR

Peak Information Rate

PKCS

Public Key Cryptography Standards

PKI

Public Key Infrastructure

PLCP

Physical Layer Convergence Protocol

PLM

Payload Mismatch

PLMN

Public Land Mobile Network

PLR

Point of Local Repair

PM

Path Monitoring

PMSI

P-Multicast Service Interface

PMSTP

Provider Multi-Instance Spanning Tree Protocol

PMT

Program Map Table

PN

Packet Number

Pseudo-Node

PNNI

Private Network-to-Network Interface

POA

Program Off Air

POI

Purge Originator Identification

PON

Passive Optical Network

POP

Points of Presence

POS

Packet over SONET

PPID

Payload Protocol Identifier

PPP

Point-to-Point Protocol

PPPoE

Point-to-Point Protocol over Ethernet

PPS

Packets per Second

PPTP

Point-to-Point Tunneling Protocol

PQR

Picture Quality Rating

PRC

Path Restoration Combined

Primary Reference Clock

PRF

Pseudorandom Function

PRI

Packet Priority

PSB

Path State Block

PSC

Protection Switching Coordination

PSCP

Programmable Subscriber Configuration Policy

PSD

Protection Switching Duration

PSH

Push

PSI

Payload Structure Identifier

PSK

Pre-Shared Key

PSM

Peer State Machine

PSN

Packet-Switched Network

PSNP

Partial Sequence Number PDU

PSNR

Peak Signal-to-Noise Ratio

PST

Path Setup Type

PT

Payload Type

PTA

PMSI Tunnel Attribute

PPP Termination Aggregation

PTB

Packet Too Big

PTI

Payload Type Indicator

PTSF

Packet Timing Signal Fail

PTP

Performance Transparency Protocol

Precision Time Protocol

PVC

Permanent Virtual Circuit

PVCC

Permanent Virtual Channel Connection

PVP

Permanent Virtual Path

PVPC

Permanent Virtual Path Connection

PVST

Per VLAN STP

PW

Pseudowire

PWE

Pseudowire Emulation

PWE3

Pseudowire Emulation Edge-to-Edge

PW FWD

Pseudowire Forwarding

PXC

Port Cross-Connect

Q.922

ITU-T Q-series Specification 922

QCI

QoS Class Identifier

QCOW2

Virtual disk image format supported by QEMU

QEMU

Quick Emulator

QER

QoS Enforcement Rule

QL

Quality Level

QL-DNU

Quality Level-Do Not Use

QL-DUS

Quality Level-Don’t Use for Synchronization

QoE

Quality of Experience

QoS

Quality of Service

QPPB

QoS Policy Propagation via BGP

QSFP

Quad Small Form-factor Pluggable

RA

Router Advertisement

Route Advertise

RAA

Re-Authentication Answer

RADIUS

Remote Authentication Dial In User Service

RAI

Routing Area Identity

RAM

Reporting and Analysis Manager

RAN

Radio Access Network

R-APS

Ring Automatic Protection Switching

RAR

Re-Authentication Request

RAS

Remote Access Server

RAT

Radio Access Type

RBOC

Regional Bell Operating Company

RC

Result Code

RCO

Routed Central Office

RD

Route Distinguisher

RDI

Remote Defect Indication

RDM

Russian Doll Model

RDNSS

Recursive DNS Server

RE

Regular Expression

RED

Random Early Discard

RESV

Reservation

RET

Retransmission

RFC

Request for Comments

RFD

Route Flap Damping

RFI-IMA

IMA Remote Failure Indication

RG

Routed Gateway

RGW

Residential Gateway

RHEL

Real Hat Enterprise Linux

RI

Router Information

RIB

Routing Information Base

RIP

Routing Information Protocol

RNC

Radio Network Controller

RLFA

Remote Loop-Free Alternate

RNCV

Ring Node Connectivity Verification

RMON

Remote Network Monitoring

ROA

Route Origin Authorization

RP

Rendezvous Point

RPC

Remote Procedure Call

RPA

RP Address

RPF

Reverse Path Forwarding

RPKI

Resource Public Key Infrastructure

RPL

Ring Protection Link

RPS

Radio Protection Switching

RPT

Rendezvous-Point Tree

RR

Reporting Reason

Route Reflector

RRO

Record Route Object

RS

Router Solicitation

RS-FEC

Reed-Solomon Forward Error Correction

RSA

Rivest, Shamir, and Adleman (authors of the RSA encryption algorithm)

RSB

Reservation State Block

RSC

Return Sub-Code

RSHG

Residential Split Horizon Group

RSS

Receive Side Scaling

RSSI

Received Signal Strength Indication

RST

Reset

RSTP

Rapid Spanning Tree Protocol

RSU

Requested Service Unit

RSVP

Resource Reservation Protocol

RSVP-TE

Resource Reservation Protocol – Traffic Engineering

RT

Receive/Transmit

RT-VBR

Real-Time Variable Bit Rate

RTC

Route Target Constraint

RTCP

RTP Control Protocol

RTM

Routing Table Manager

RTMP

Real-Time Messaging Protocol

RTMPE

Encrypted Real Time Messaging Protocol

RTMPT

Tunneled Real Time Messaging Protocol

RTP

Real-Time Transport Protocol

RTSP

Real-Time Streaming Protocol

RTT

Round Trip Time

RTU

Right To Use

R-VPLS

Routed Virtual Private LAN Service

RxDTV

Receive Decision Threshold Voltage

S2L

Source-to-leaf

S-A

Source-Active

SA

Security Association

SAA

Service Assurance Agent

SAC

State Advertisement Control

SAFI

Subsequent Address Family Identifier

SAI

Service Area Identity

Secure Association Identifier

SAII

Source Access Individual Identifier

Source Attachment Individual Identifier

SAK

Security Association Key

SaMOG

S2a Mobility based on GPRS Tunneling Protocol

SAP

Service Access Point

Subscriber Access Point

SASE

Stand Alone Synchronization Equipment

SAToP

Structure-Agnostic TDM over Packet

SBAU

Shared Buffer Average Utilization

SBD

Supplementary Broadcast Domain

SBR

Source-Based Reroute

SBU

Shared Buffer Utilization

SC

Security Channel

SCCCN

Start-Control-Connection-Connected

SCCRP

Start-Control-Connection-Reply

SCCRQ

Start-Control-Connection-Request

SCI

Secure Channel Identifier

SCP

Secure Copy

SCR

Sustained Cell Rate

SCTE

Society of Cable Telecommunications Engineers

SCTP

Stream Control Transmission Protocol

SCUR

Session Charging with Unit Reservation

SD

Signal Degrade

Space Diversity

SDH

Synchronous Digital Hierarchy

SDK

Software Development Kit

SDN

Software Defined Network

SDP

Service Destination Point

SDSL

Symmetric Digital Subscriber Line

SDU

Service Data Unit

SE

Shared Explicit

SecTAG

Security TAG

SecY

MAC Security Entity

SeGW

Secure Gateway

SeND

Secure Neighbor Discovery

SERO

Secondary ERO

SES

Severely Errored Second

SETS

Synchronous Timing Equipment Subsystem

SF

Signal Fail

SFF

Small Form Factor

SFM

Switch Fabric Module

SFP

Small Form-factor Pluggable (transceiver)

SGSN

Serving GPRS Support Node

SGT

Self-Generated Traffic

SGW

Serving Gateway

SHA

Secure Hash Algorithm

SHCV

Subscriber Host Connectivity Verification

SHG

Split Horizon Group

SI

Service Information Set ID

SID

Segment ID

SIDR

Secure Inter-Domain Routing

SIM

Subscriber Identity Module

SIP

Session Initiation Protocol

SIR

Sustained Information Rate

SL

Synthetic Loss

Short Length

SLA

Service Level Agreement

SLAAC

Stateless Address Auto-Configuration

SLARP

Serial Line Address Resolution Protocol

SLM

Synthetic Loss Message

SLR

Static Labeled Routes

Synthetic Loss Reply

SM

Section Monitoring

SMBIOS

System Management BIOS

SMAC

Source MAC Address

SMGR

Service Manager

SMTP

Simple Mail Transfer Protocol

SNA

System Network Architecture

SNAP

Subnetwork Access Protocol

SNAPT

Source Network Address and Port Translation

SNCP

Sub-Network Connection Protection

SNI

Server Name Indicator

SNMP

Simple Network Management Protocol

SNPA

Subnetwork Point of Attachment

SNR

Signal to Noise Ratio

SNTP

Simple Network Time Protocol

SOAM

Service OAM

SONET

Synchronous Optical Network

SOO

Site of Origin

SP

Service Provider

SPB

Shortest Path Bridging

SPBM

Shortest Path Bridging MAC Mode

S-PE

Switching Provider Edge router

SPF

Shortest Path First

SPI

Security Parameter Index

SPI

SLA Profile Instance

S-PMSI

Selective Provider Multicast Service Interface

SPT

Shortest Path Tree

SPTS

Single-Program Transport Stream

SQE

Signal Quality Error

SQN

Sequence Number

SR

Segment Routing

Service Router (7750 SR)

SRGB

Segment Routing Global Block

SRLB

Segment Routing Local Block

SRLG

Shared Risk Link Group

SRRP

Subscriber Routed Redundancy Protocol

SRPY

Service Router Python

SR-IOV

Single Root I/O Virtualization

SR-MS

Segment Routing Mapping Server

SR-TE

Segment Routing Traffic Engineering

SSD

Solid State Drive

SSDP

Simple Service Discovery Protocol

SSH

Secure Shell

SSL

Secure Socket Layer

SSM

Source-Specific Multicast

Synchronization Status Messages

Synchronization Status Messaging

SSRC

Synchronization Source

SSU

System Synchronization Unit

Synchronization Supply Unit

STA

Session-Termination-Answer

S-TAG

Service VLAN tag

STB

Set Top Box

STM1

Synchronous Transport Module, level 1

STP

Spanning Tree Protocol

STR

Session-Termination-Requests

STS

Synchronous Transport Signal

STUN

Session Traversal Utilities for NAT

SVC

Switched Virtual Circuit

SVID

Stacked VLAN ID

S-VLAN

Service Provider VLAN

SYN

Synchronize

TAC

Technical Assistance Center

TACACS+

Terminal Access Controller Access-Control System Plus

TAF

Time Average Factor

TAI

Tracking Area Identifier

TAU

Tracking Area Update

TAII

Target Attachment Individual Identifier

TC

Traffic Class (formerly known as EXP bits)

TCA

Threshold Crossing Alert

Traffic Crossing Alert

TCAM

Ternary Content Addressable Memory

TCI

TAG Control Information

TCN

Topology Change Notification

TCP

Transmission Control Protocol

TCP-AO

TCP Authentication Option

TCSB

Traffic Control State Block

TDF

Traffic Detection Function

TDM

Time Division Multiplexing

TDP-ID

Time Descriptor Policy Identifier

TE

Traffic Engineering

TED

Traffic Engineering Database

TEI

Transport Error Identifier

TEID

Tunnel Endpoint Identifier

TEP

Tunnel Endpoint

TFN

Tribe Flood Network

TFTP

Trivial File Transfer Protocol

TI-LFA

Topology-Independent Loop-Free Alternate

TIM

Trace Identifier Mismatch

T-LDP

Targeted LDP

TLS

Transport Layer Security

TLV

Type Length Value

TM

Traffic Management

TNC

Technically Non-Conformant

TNS

Transparent Network Substrate

ToD

Time of Day

TOR

Top-of-Rack

ToS

Type-of-Service

T-PE

Terminating Provider Edge router

TPID

Tag Protocol Identifier

TPMR

Two-Port MAC Relay

TPSDA

Triple Play Service Delivery Architecture

TS

Transport Stream

TSH

TTL Security Hack

TTI

Trail Trace Identifier

TTL

Time to Live

TTLS

Tunneled Transport Layer Security

TTM

Tunnel Table Manager

TVL

Type Value Length

TWAMP

Two-Way Active Measurement Protocol

TWAN

Trusted WLAN Access Network

U-APS

Unidirectional Automatic Protection Switching

uBFD

Micro Bidirectional Forwarding Detection

UBR

Unspecified Bit Rate

UDLD

Uni-directional Link Detection

UDP

User Datagram Protocol

UE

User Equipment

Unified Extensible Firmware Interface

UFD

Unidirectional Forwarding Detection

ULI

User Location Information

ULIC

UMTS Lawful Intercept Correlation Header

UM

Usage Monitoring

UMH

Upstream Multicast Hop

UMTS

Universal Mobile Telecommunications System (3G)

UNI

User-to-Network Interface

UNC

Usage Parameter Control

UPF

User Plane Function

UPnP

Universal Plug and Play

URG

Urgent

URI

Uniform Resource Identifier

URL

Uniform Resource Locator

uRPF

Unicast Reverse Path Forwarding

URR

Usage Reporting Rule

USM

User-based Security Model

USU

Used Service Unit

UTC

Coordinated Universal Time

UTF

Unicode Transformation Format

UTM

Unified Threat Management

UUI

User-to-User Indication

VACM

View-based Access Control Model

VAS

Value Added Service

VBO

VE Block Offset

VBR

Variable Bit Rate

VBS

VE Block Size

VC

Virtual Circuit

Virtual Channel

VCC

Virtual Channel Connection

VCCV

Virtual Circuit Connectivity Verification

vCD

vCloud Director

VCI

Virtual Channel Identifier

VC-ID

Virtual Circuit Identifier

VCL

Virtual Channel Link

VCP

Virtual Core Port

VDSL

Very-High-Bit-Rate DSL

VE

VPLS Edge

VE-ID

VPWS Edge Identifier

VF

Virtual Function

vFP

Virtual Forwarding Plane

V-GW

Visited WLAN-GW

VID

VLAN ID

VIM

Virtualized Infrastructure Manager

VLAN

Virtual LAN

VLL

Virtual Leased Line

VM

Virtual Machine

VMAC

Virtual MAC Address

VMDK

Virtual Machine Disk

vMEPs

Virtual MEPS

VNF

Virtual Network Function

VNFD

Virtual Network Function Descriptor

VNFM

Virtualized Network Function Manager

VNFO

Virtualized Network Function Orchestrator

VNI

VXLAN Network Identifier

VoD

Video on Demand

VoIP

Voice over IP

VP

Virtual Path

VPC

Virtual Path Connection

VPI

Virtual Path Identifier

VPL

Virtual Path Link

VPLS

Virtual Private LAN Service

VPN

Virtual Private Network

Vport

Virtual Port

VPRN

Virtual Private Routed Network

VPWS

Virtual Private Wire Service

VQM

Video Quality Monitoring

VRF

Virtual Routing and Forwarding table

vRGW

Virtual Residential Gateway

VRID

Virtual Router ID

VRP

Validated ROA Payload

VRRP

Virtual Router Redundancy Protocol

VRS

Virtual Routing and Switching

VSA

Vendor-Specific Attribute

VSC

Virtual Services Controller

VSD

Virtual Services Directory

VSG

Virtual Services Gateway

VSI-ID

Virtual Switch Instance identifier

VSM

Vendor-Specific Message

Versatile Service Module

VSO

Vendor-Specific Option

VSP

Virtual Services Platform

VSR

Virtualized Service Router

VSR-a

Virtualized Service Router Appliance

VSR-I

Integrated Model for the Virtualized Service Router

VSTQ

Video Service Transmission Quality

VT

Validity Time

Virtual Trunk

VT-d

Virtualization Technology for Directed I/O

VT-x

Virtualization Technology for x86 processors

VTEP

VXLAN Tunnel Endpoint

VTP

Virtual Trunk Protocol

VXLAN

Virtual eXtensible Local Area Network

WAC

WiMAX Access Controller

WAN

Wide Area Network

WAP

Wireless Application Protocol

WDRR

Weighted Deficit Round Robin

WFQ

Weighted Fair Queuing

WINS

Windows Internet Name Service

WLAN

Wireless Local Area Network

WLAN-GW

WLAN Gateway

WPP

Web Authentication Protocol

Wireless Portal Protocol

WRED

Weighted Random Early Detection

Weighted Random Early Discard

WRR

Weighted-Round-Robin

WTB

Wait to Block

WTR

Wait to Restore

x2APIC

x2 Advanced Programmable Interrupt Controller

X.21

ITU-T X-series Recommendation 21

XFP

10 Gigabit Small Form Factor Pluggable

XMA

XRS Media Adapter

XML

eXtensible Markup Language

XMPP

eXtensible Messaging and Presence Protocol

XPN

eXtended Packet Number

XRO

Exclude Route Objects

ZTP

Zero Touch Provisioning