09-Acronyms

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# A B C D E F G H I K L M N O P Q R S T U V W X Z

3DES

Triple Data Encryption Standard

6PE

IPv6 Provider Edge

A

Return

AAA

Authentication, Authorization and Accounting

AAL

ATM Adaptation Layer

AAL5

ATM Adaptation Layer 5

ABR

Area Border Router

AC

Access Category

AC

Access Controller

AC

Attachment Circuit

ACA

Acquire Change Authorization

ACCM

Async-Control-Character-Map

ACFC

Address-and-Control-Field-Compression

ACFP

Application Control Forwarding Protocol

ACL

Access Control List

ACS

Auto-Configuration Server

ACSEI

ACFP Client and Server Exchange Information

AD

Active Directory

ADM

ATM Direct Mapping

ADPCM

Adaptive Differential Pulse Code Modulation

ADSL

Asymmetric Digital Subscriber Line

AES

Advanced Encryption Standard

AF

Assured Forwarding

AFI

Authority and Format Identifier

AFI

Address Family Identifier

AFT

Address Family Translation

AFTR

Address Family Transition Router

AH

Authentication Header

AIFSN

Arbitration Inter Frame Spacing Number

AIS

Alarm Indication Signal

AIW

APPN Implementers Workshop

ALG

Application Level Gateway

AM

Analog Modem

AMB

Active Main Board

AMD

Answering Machine Detection

AMI

Alternate Mark Inversion

A-MPDU

Aggregated MAC Protocol Data Unit

ANI

Adaptive Noise Immunity

ANSI

American National Standard Institute

AP

Access Point

APD

Avalanche Photo Diode

APP

Application Protocol

APPN

Advanced Peer-to-Peer Networking

ARP

Address Resolution Protocol

ARQ

Automatic Repeat Request

AS

Autonomous System

ASBR

Autonomous System Boundary Router

ASM

Any-Source Multicast

ASPF

Advanced Stateful Packet Filter

ASPF

Application Specific Packet Filter

AT

AppleTalk

ATD

Attribute Discovery

ATM

Auto Teller Machine

ATM

Asynchronous Transfer Mode

AU

Administration Unit

AUG

Administration Unit Group

AUG

Administrative Unit Group

AU-PTR

Administration Unit Pointer

AVF

Appointed VLAN-x Forwarder

AVF

Active Virtual Forwarder

AVP

Attribute Value Pair

B

Return

B4

Basic Bridging BroadBand

B8ZS

Bipolar 8-zero substitution

BAS

Broadband Access Server

BB_Credit

Buffer-to-Buffer Credit

BC

Boundary Clock

BC

Bandwidth Constraint

BCB

Backbone Core Bridge

BDI

Backward Defect Indication

BDR

Backup Designated Router

BE

Best Effort

BEB

Backbone Edge Bridge

BECN

Backward Explicit Congestion Notification

BERT

Bit Error Rate Test

BFD

Bidirectional Forwarding Detection

BGP

Border Gateway Protocol

BID

Bundle Identifier

BIDIR-PIM

Bidirectional Protocol Independent Multicast

BIMS

Branch Intelligent Management System

BIP

Bit-Interleaved Parity

B-MAC

Backbone MAC

BMC

Best Master Clock

BOOTP

Bootstrap Protocol

BOP

Bit-Oriented protocol

BPDU

Bridge Protocol Data Unit

bps

bits per second

BQ

Bandwidth Queuing

BRI

Basic Rate Interface

BSB

Blockade State Block

BSM

Bootstrap Message

BSMF

Bootstrap Message Fragment

BSR

Bootstrap Router

BSS

Basic Service Set

BSV

BRI S/T Voice

BT

BitTorrent

B-VLAN

Backbone VLAN

C

Return

C/S

Client/Server

CA

Certificate Authority

CAC

Connect Admission Control

CAMS

Comprehensive Access Management Server

CAPWAP

Controlling and Provisioning of Wireless Access Point

CAR

Committed Access Rate

CB

Customer Bridge

CBC

Cipher Block Chaining

CBQ

Class Based Queuing

CBR

Constant Bit Rate

CBS

Committed Burst Size

C-BSR

Candidate-BSR

CBT

Core-Based Tree

CBWFQ

Class Based Weighted Fair Queuing

CC

Control Channel

CC

Continuity Check

CC

Call Control

CCC

Circuit Cross Connect

CCITT

Consultative Committee for International Telegraph and Telephone

CCM

Continuity Check Message

CCMP

CTR with CBC-MAC Protocol

C-DCC

Circular DCC

CDCP

S-Channel Discovery and Configuration Protocol

CDP

Cisco Discovery Protocol

CDR

Call Detail Records

CDV

Cell Delay Variation

CE

Customer Edge

CEE

Converged Enhanced Ethernet

CEM

Circuit Emulation

CEM Class

Circuit Emulation Class

CESOPSN

Circuit Emulation Services over PSN

CF

Compact Flash

CFB

Call Forwarding–Busy

CFD

Connectivity Fault Detection

CFI

Canonical Format Indicator

CFM

Connectivity Fault Management

CFU

Call Forwarding–Unconditional

CHAP

Challenge Handshake Authentication Protocol

CID

Calling Identity Delivery

CIDR

Classless Inter-Domain Routing

CIR

Committed Information Rate

CIR ALLOW

Committed Information Rate ALLOW

CIST

Common and Internal Spanning Tree

CLI

Command Line Interface

CLI

Calling Line Identification

CLNP

Connection-Less Network Protocol

CLP

Cell Loss Priority

CLV

Code-Length-Value

CMC

Call Management Center

CN

Common Name

CNG

Comfortable Noise Generation

CO

Central Office

COPS

Common Open Policy Service

CoS

Class of Service

CPE

Customer Premises Equipment

CPOS

Channelized POS

CPS

Certification Practice Statement

CPTone

Call Progress Tone

CQ

Custom Queuing

CR

Constraint-based Routing

CRBT

Caller Ring Back Tone

CRC

Cyclic Redundancy Code

CRC

Cyclic Redundancy Check

CRC4

Cyclic Redundancy Check 4

CRL

Certificate Revocation List

CRLDP

Constraint-based Routed Label Distribution Protocol

CRLSP

Constraint-based Routed Label Switched Paths

C-RP

Candidate-RP

CS

Class Selector

CS-ACELP

Conjugate-Structure Algebraic-Code-Excited Linear-Prediction

CSMA/CD

Carrier Sense Multiple Access/Collision Detect

CSNP

Complete Sequence Number PDU

CSNP

Complete SNP

CSPF

Constraint-based Shortest Path First

CST

Common Spanning Tree

CSU

Channel Service Unit

CT

Class Type

CTR

Counter mode

CUG

Closed User Group

CV

Connectivity Verification

CVLAN

Customer VLAN

CWMP

CPE WAN Management Protocol

D

Return

DAC

Digital to Analog Converter

DAD

Duplicate Address Detection

DAR

Deeper Application Recognition

DCBX

Data Center Bridging Exchange Protocol

DCC

Dial Control Center

DCD

Data Carrier Detection

DCE

Date Center Ethernet

DCE

Data Circuit-terminating Equipment

DCF

Distributed Coordination Function

DD

Database Description

DDN

Digital Data Network

DDNS

Dynamic Domain Name System

DDoS

Distributed Denial of Service

DDR

Dial-on-Demand Routing

DE

Discard Eligibility

DED

Designated Edge Device

DER

Distinguished Encoding Rules

DES

Data Encryption Standard

DF

Designated Forwarder

DFS

Dynamic Frequency Selection

DH

Diffie-Hellman

DHCP

Dynamic Host Configuration Protocol

DHCPv6

Dynamic Host Configuration Protocol for IPv6

DID

Device ID

DID

Direct Inward Dialing

DiffServ

Differentiated Service

DIS

Designated IS

DLCI

Data Link Connection Identifier

DLDP

Device Link Detection Protocol

DLSw

Data Link Switching

DM

Diagnostic and Monitoring

DM

Delay Measurement

DMC

Device Management Controller

DMM

Delay Measurement Message

DMR

Delay Measurement Reply

DMZ

Demilitarized Zone

DN

Distinguished Name

DNAT

Destination Network Address Translation

DNAT

Destination NAT

DND

Do Not Disturb

DNS

Domain Name System

DoD

Downstream On Demand

DO-EO

Delayed Offer to Early Offer

DoS

Denial of Service

DPD

Dead Peer Detection

DR

Designated Router

DRB

Designated Routing Bridge

DS

Differentiated Services

DSA

Digital Signature Algorithm

DSCP

Differentiated Services Code Point

DSL

Digital Subscriber Line

DS-Lite

Dual Stack Lite

DSP

Domain Specific Part

DS-TE

DiffServ-aware TE

DSU

Data Service Unit

DTE

Data Terminal Equipment

DTIM

Delivery Traffic Indication Message

DTMF

Dual Tone Multi-Frequency

DU

Downstream Unsolicited

DUID

DHCP Unique Identifier

DUID-LL

DUID Based on Link-layer Address

D-V

Distance Vector

DVMRP

Distance Vector Multicast Routing Protocol

DVPN

Dynamic Virtual Private Network

DWDM

Dense Wavelength Division Multiplexing

E

Return

E2ETC

End-to-End Transparent Clock

EAA

Embedded Automation Architecture

EACL

Enhanced ACL

EAD

Endpoint Admission Defense

EAIS

Ethernet Alarm Indication Signal

EAN

Ethernet Access Node

EAP

Extensible Authentication Protocol

EAPOL

Extensible Authentication Protocol over LAN

EAPOR

EAP over RADIUS

EAP-TLS

EAP-Transport Layer Security

EAP-TLS

Extensible Authentication Protocol -Transport Layer Security

EBS

Excess Burst Size

EC

Echo cancellation

ECDSA

Elliptic Curve Digital Signature Algorithm

ECM

Error Correction Mode

ECMP

Equal-Cost Multipath

ECN

Explicit Congestion Notification

ECP

Edge Control Protocol

E-CPOS

Enhanced CPOS

ECWmax

Exponent form of CWmax

ECWmin

Exponent form of CWmin

ED

Edge Device

EDCA

Enhanced Distributed Channel Access

EF

Expedited Forwarding

EFM

Ethernet First Mile

EGP

Exterior Gateway Protocol

EM

Event Monitor

ENDC

EVI Neighbor Discovery Client

End-Of-RIB

End of Routing-Information-Base

ENDP

EVI Neighbor Discovery Protocol

ENDS

EVI Neighbor Discovery Server

ENUM

Telephone Number Mapping

EoA

Ethernet over ATM

EOAM

Ethernet Operation, Administration and Maintenance

EoPW

Ethernet over Pseudo Wire

ER

Explicit Route

ER

Edge Relay

ERT

Export Route-target

ES

End System

ESF

Extended Super Frame

ESN

Extended Sequence Number

ESP

Encapsulating Security Payload

ESS

Exchange Switch Support

ETS

Enhanced Transmission Selection

ETSI

European Telecommunications Standards Institute

EUI

Extended Unique Identifier

EUI-64

64-bit Extended Unique Identifier

EVB

Edge Virtual Bridging

EVFP

Exchange Virtual Fabrics Parameter

EVI

Ethernet Virtualization Interconnect

F

Return

FA

Foreign-AC

FAS

Frame Alignment Signal

FC

Fibre Channel

FCF

FCoE Forwarder

FCM

Fast Connect Modem

FCoE

Fibre Channel over Ethernet

FCS

Frame Check Sequence

FDB

Forwarding Database

FDL

Facilities Data Link

FE

Fast Ethernet

FEAC

Far End and Control Signal

FEC

Forwarding Equivalence Class

FECN

Forward Explicit Congestion Notification

FEP

Front End Processor

FF

Fixed-Filter

FFD

Fast Failure Detection

FIB

Forwarding Information Base

FIFO

First In First Out

FIP

FCoE Initialization Protocol

FIP Snooping

FCoE Initialization Protocol Snooping

FIPS

Federal Information Processing Standards

FLOGI

Fabric Login

FNG

Fault Notification Generator

FoIP

Fax over IP

FPMA

Fabric Provided MAC Address

FQ

Fair Queuing

FQDN

Fully Qualified Domain Name

FR

Frame Relay

FRR

Fast Reroute

FRTP

Frame Relay Traffic Policing

FRTS

Frame Relay Traffic Shaping

FRU

Field Replaceable Unit

FS

Forced Switch

FSC

Frame Synchronization Control

FSK

Frequency Shift Keying

FSPF

Fabric Shortest Path First

FT

Fault Tolerance

FTN

FEC to NHLFE map

FTP

File Transfer Protocol

FXO

Foreign Exchange Office

FXS

Foreign Exchange Station

G

Return

G.SHDSL

Single-pair High-speed DSL Defined in ITU-T Standard G.991.2

GARP

Generic Attribute Registration Protocol

GE

Gigabit Ethernet

GI

Guard Interval

GK

GateKeeper

GM

Grandmaster Clock

GNS

Get Nearest Server

GPS

Global Positioning System

GR

Graceful Restart

GRE

Generic Routing Encapsulation

GTC

Generic Token Card

GTK

Group Temporal Key

GTP

GPRS Tunneling Protocol

GTP-U

GPRS Tunneling Protocol User

GTP-V0

GPRS Tunneling Protocol V0

GTS

Generic Traffic Shaping

GTSM

Generalized TTL Security Mechanism

GVRP

GARP VLAN Registration Protocol

GW

Gateway

H

Return

HA

Home-AC

HABP

HW Bypass Protocol

HBA

Host Bus Adapter

HDB3

High-density bipolar 3

HDLC

High-level Data Link Control

HDSL

High-bit-rate Digital Subscriber Line

HGMP

HW Group Management Protocol

HGMPv2

HW Group Management Protocol version 2

HLC

Higher Layer Compatibility

HMAC

Hash-based Message Authentication Code

HO-DSP

High Order Part of DSP

HoPE

Hierarchy of PE

HoVPN

Hierarchy of VPN

HQoS

Hierarchical Quality of Service

HTTP

Hypertext Transfer Protocol

HTTPS

Hypertext Transfer Protocol Secure

HTTPS

HTTP Security

H-VPLS

Hierarchical VPLS

HWTACACS

HW Terminal Access Controller Access Control System

I

Return

IA

Identity Association

IACTP

Inter Access Controller Tunneling Protocol

IAD

Integrated Access Device

IANA

Internet Assigned Numbers Authority

IBGP

Internal Border Gateway Protocol

IBGP

Internal BGP

ICMP

Internet Control Message Protocol

ICMPv4

Internet Control Message Protocol version 4

ICMPv6

Internet Control Message Protocol for IPv6

ICP

IMA Control Protocol

ICPIF

Calculated Planning Impairment Factor

I-DEI

Backbone Service Instance Drop Eligibility Indicator

IDI

Initial Domain Identifier

IDN

Integrated Digital Network

IDP

Initial Domain Part

IDS

Intrusion Detection System

IE

Information Element

IEEE

Institute of Electrical and Electronics Engineers

IETF

Internet Engineering Task Force

IGMP

Internet Group Management Protocol

IGMP Snooping

Internet Group Management Protocol Snooping

IGP

Interior Gateway Protocol

IIH

IS-to-IS hello

IIS

Internet Information Services

IKE

Internet Key Exchange

IKEv2

Internet Key Exchange version 2

ILM

Incoming Label Map

ILS

Internet Locator Service

IM

Instant Messaging

IMA

Inverse Multiplexing for ATM

iMC

Intelligent Management Center

IME

Input Method Editor

IMSI

International Mobile Subscriber Identification Number

InARP

Inverse Address Resolution Protocol

IntServ

Integrated Service

IP

Internet protocol

IPC

Inter-process Communication

I-PCP

Backbone Service Instance Priority Code Point

IPE

Image Package Envelope

IPHC

IP Header Compression

IPng

IP Next Generation

IPoA

IP Over ATM

IPoEoA

IP Over Ethernet Over ATM

IPS

Intrusion Prevention System

IPsec

IP Security

IPTA

IP Terminal Access

IPv4

Internet Protocol version 4

IPv6

Internet Protocol version 6

IPv6 MBGP

IPv6 Multicast BGP

IPv6 PIM

Protocol Independent Multicast for IPv6

IPX

Internetwork Packet Exchange

IRDP

ICMP Router Discovery Protocol

IRF

Intelligent Resilient Framework

IS

Intermediate System

ISAKMP

Internet Security Association and Key Management Protocol

ISATAP

Intra-Site Automatic Tunnel Addressing Protocol

ISDN

Integrated Services Digital Network

I-SID

Backbone Service Instance Identifier

IS-IS

Intermediate System-to-Intermediate System

ISO

International Organization for Standardization

ISP

Internet Service Provider

ISPF

Incremental Shortest Path First

ISSU

In-Service Software Upgrade

IST

Internal Spanning Tree

ITSP

Internet Telephone Service Provider

ITU-T

International Telecommunication Union Telecommunication

IV

Initialization Vector

IVR

Interactive Voice Response

K

Return

KA

Keep-alive

L

Return

L2F

Layer 2 Forwarding

L2TP

Layer 2 Tunneling Protocol

L2VPN

Layer 2 Virtual Private Network

L3VPN

Layer 3 Virtual Private Network

LAC

L2TP Access Concentrator

LAC

Location Area Code

LACP

Link Aggregation Control Protocol

LACPDU

Link Aggregation Control Protocol Data Unit

LAN

Local Area Network

LAPB

Link Access Procedure, Balanced

LB

Label Base

LB

Load Balance

LBM

Loopback Message

LBR

Loopback Reply

LC

Logic Channel

LCFO

Loop Current Feed Open

LCI

Logic Channel Identifier

LCP

Link Control Protocol

LDAP

Lightweight Directory Access Protocol

LDP

Label Distribution Protocol

LDP ID

LDP Identifier

LER

Label Edge Router

LFA

Loss of Frame Align

LFI

Link Fragmentation and Interleaving

LFIB

Label Forwarding Information Base

LGS

Loop-start & Ground-start Signaling

LI

Leap Indicator

LID

Link Identification

LLB

Line Loopback

LLC

Lower Layer Compatibility

LLC

Link Local Signaling

LLC

Logical Link Control

LLC2

Logical Link Control Type 2

LLDP

Link Layer Discovery Protocol

LLDPDU

Link Layer Discovery Protocol Data Unit

LLDP-MED

Link Layer Discovery Protocol Media Endpoint Discovery

LLQ

Low Latency Queuing

LM

Loss Measurement

LMI

Local Management Interface

LMM

Loss Measurement Message

LMR

Loss Measurement Reply

LNS

L2TP Network Server

LO

Label-block Offset

LOCV

Loss of Connectivity Verification defect

LOS

Loss of Signal

LPU

Line Processing Unit

LQC

Link Quality Control

LQR

Link Quality Reports

LR

Line Rate

LR

Label Range

LSA

Link State Acknowledgment

LSA

Link State Advertisement

LSAck

Link State Acknowledgment

LSDB

Link State DataBase

LSP

Link State PDU

LSP

Label Switched Path

LSP

Link State Packet

LSPDU

Link State Protocol Data Unit

LSR

Link State Request

LSR

Label Switching Router

LSR

Link State Record

LSU

Link State Update

LT

Linktrace

LTM

Linktrace Message

LTR

Linktrace Reply

LVF

Listening Virtual Forwarder

M

Return

M flag

Managed Address Configuration Flag

MA

Maintenance Association

MAC

Message Authentication Code

MAC

Media Access Control

MAD

Multi-Active Detection

MAM

Maximum Allocation Model

MAN

Metropolitan Area Network

MAP

Mesh Access Point

MaxBC

Maximum Number of Bandwidth Constraints

MBGP

Multicast BGP

MBS

Maximum Burst Size

MCC

Mobile Country Code

MCE

Multi-VPN-instance Customer Edge

MCS

Modulation and Coding Scheme

MCU

Multipoint Control Unit

MD

Multicast Domain

MD

Maintenance Domain

MD5

Message-Digest 5

MDC

Multitenant Devices Context

MDI

Medium Dependent Interface

MDL

Maintenance Data Link

MDMF

Multiple Data Message Format

MDT

Multicast Distribution Tree

MED

Multi-Exit Discriminator

MEP

Maintenance association End Point

MFAS

Multiframe FAS

MFC

Multi-Frequency Compelled

MFF

MAC-Forced Forwarding

MFR

Multilink Frame Relay

MGCP

Media Gateway Control Protocol

MIB

Management Information Base

MIC

Message Integrity Check

MIP

Maintenance association Intermediate Point

MKD

Mesh Key Distributor

MLD

Multicast Listener Discovery Protocol

MLD Snooping

Multicast Listener Discovery Snooping

MLSP

Mobile Link Switch Protocol

MNC

Mobile Network Code

MoH

Music on Hold

MOS

Mean Opinion Scores

MOTD

Message of The Day

MP

Maintenance Point

MP

Merge Point

MP_REACH_NLRI

Multiprotocol Reachable NLRI

MP_UNREACH_NLRI

Multiprotocol Unreachable NLRI

MP-BGP

Multiprotocol Border Gateway Protocol

MPDU

MAC Protocol Data Unit

MPE

Middle-level PE

MPLS

Multiprotocol Label Switching

MPLS TE

Multiprotocol Label Switching Traffic Engineering

MPLS-TP

MPLS Transport Profile

MPoFR

Multilink PPP Over Frame Relay

MPP

Mesh Portal Point

MPU

Main Processing Unit

MQC

Modular QoS Command

MQC

Modular QoS Configuration

MR

Mobile Radio

MR

Merge Request

MRM

Mesh Routing Management

MRP

Multiple Registration Protocol

MRPDU

MRP Protocol Data Unit

MRRA

Merge Request Resource Allocation

MRU

Maximum Receive Unit

MS

Manual Switch

MSCHAP

Microsoft Challenge Handshake Authentication Protocol

MSDP

Multicast Source Discovery Protocol

MSDU

MAC Service Data Unit

MSK

Multicast Session Key

MSOH

Multiplex Section Overhead

MSS

Maximum Segment Size

MST

Multiple Spanning Tree

MSTI

Multiple Spanning Tree Instance

MSTP

Multiple Spanning Tree Protocol

MT

Multicast Tunnel

MTR

Multi-Topology Routing

MTU

Maximum Transmission Unit

MTU-s

Multi-Tenant Unit switch

MU

Mobile Unit

MVRP

Multiple VLAN Registration Protocol

MWI

Message Waiting Indication

N

Return

NA

Neighbor Advertisement

NAPT

Network Address Port Translation

NAPT-PT

Network Address Port Translation-Protocol Translation

NAS

Network Access Server

NAT

Network Address Translation

NAT-PT

Network Address Translation-Protocol Translation

NBMA

Non-Broadcast Multi-Access

NBT

NetBIOS over TCP/IP

NCP

Network Control Protocol

ND

Neighbor Discovery

NDA

NetStream Data Analyzer

NDE

NetStream Data Exporter

NDP

Neighbor Discovery Protocol

NET

Network Entity Title

NetBIOS

Network Basic Input/Output System

NETCONF

Network Configuration Protocol

NFAS

non–FAS

NHLFE

Next Hop Label Forwarding Entry

NI

National ISDN

NIB

Nexthop Information Base

NIC

Network Interface Card

NII

Network International Identifier

NIST

National Institute of Standard and Technology

NIT

Not Initial Terminal

NLB

Network Load Balancing

NLBS

Network Load Balancing Services

NLPID

Network Layer Protocol Identifier

NLRI

Network Layer Reachability Information

NM

Network Management

NMFAS

Non-Multiframe FAS

NMS

Network Management System

NMS

Network Management Server

NMS

Network Management Station

NNI

Network-to-Network Interface

NPDU

Network Protocol Data Unit

NPE

Network Provider Edge

NPV

N_Port Virtualization

NQA

Network Quality Analyzer

nrt-VBR

non-real-time Variable Bit Rate

NRZ

NonReturn to zero

NRZI

NonReturn to Zero Inverted

NS

Neighbor Solicitation

NSAP

Network Service Access Point

NSC

NetStream Collector

N-SEL

NSAP Selector

NSF

Non-Standard Facilities

NSR

Nonstop Routing

NSSA

Not-So-Stubby Area

NTDP

Neighbor Topology Discover Protocol

NTE

Named Telephone Event

NTL

Need to Know

NTP

Network Time Protocol

NTT

Nippon Telegraph and Telephone Corporation

O

Return

O Flag

Other Stateful Configuration Flag

OAA

Open Application Architecture

OAM CC

OAM Continuity Check

OAMPDU

Operation, Administration and Maintenance Protocol Data Unit

OAMPDU

OAM Protocol Data Units

OAP

Open Application Platform

OC

Optical Carrier

OC

Ordinary Clock

ODF

Optical Distribution Frame

OID

Object Identifier

OOB

Out-of-Band

OOF

Out of Frame

ORF

Outbound Route Filtering

OSI

Open System Interconnection

OSPF

Open Shortest Path First

OU

Organization Unit

OUI

Organizationally Unique Identifier

P

Return

P device

Provider Device

P2MP

Point-to-MultiPoint

P2P

PW to PW

P2P

Peer-to-Peer

P2P

Point-to-Point

P2PTC

Peer-to-Peer Transparent Clock

PAD

Packet Assembly/Disassembly

PADT

PPPoE Active Discovery Terminate

PAGP

Port Aggregation Protocol

PAM

Pulse Amplitude Modulation

PAM

Port to Application Map

PAP

Password Authentication Protocol

PAT

Port Address Translation

PBAR

Port Based Application Recognition

PBB

Provider Backbone Bridge

PBBN

Provider Backbone Bridge Network

PBN

Provider Bridge Network

PBO

Power Backoff

PBR

Policy-based Routing

PBX

Private Branch Exchange

PCB

Protocol Control Block

PCM

Pulse Code Modulation

PCR

Peak Cell Rate

PD

Prefix Delegation

PD

Powered Device

PDH

Plesiochronous Digital Hierarchy

PDP

Policy Decision Point

PDU

Protocol Data Unit

PE

Provider Edge

PE-agg

PE Aggregation

PEAP

Protected EAP

PEAP

Protected Extensible Authentication Protocol

PEAP-GTC

Protected Extensible Authentication Protocol-Microsoft Generic Token Card

PEAP-MSCHAPv2

Protected Extensible Authentication Protocol-Microsoft Challenge Handshake Authentication Protocol v2

PEM

Privacy Enhanced Mail

PEM

Power Entry Module

PEP

Policy Enforcement Point

PFC

Priority-based Flow Control

PFC

Protocol-Field-Compression

PFS

Perfect Forward Secrecy

PHB

Per-hop Behavior

PHP

Penultimate Hop Popping

PI

Power Interface

PIC

Prefix Independent Convergence

PIM

Protocol Independent Multicast

PIM-DM

Protocol Independent Multicast-Dense Mode

PIM-SM

Protocol Independent Multicast-Sparse Mode

PIM-SSM

Protocol Independent Multicast Source-Specific Multicast

PIN

Personal Identification Number

PIR

Peak Information Rate

PKCS

Public Key Cryptography Standards

PKI

Public Key Infrastructure

PLAR

Private Line Auto Ring-down

PLMN

Public Land Mobile Network

PLR

Point of Local Repair

PMK

Pairwise Master Key

PMTU

Path MTU

PN

Packet Number

PoE

Power over Ethernet

POH

Path Overhead

POP3

Post Office Protocol, version 3

POS

Point of Sale

POST

Power-On Self-Test

POTS

Plain Old Telephone Service

PPP

Point-to-Point Protocol

PPPoA

PPP Over ATM

PPPoE

Point-to-Point Protocol over Ethernet

PPPoEoA

PPPoE Over ATM

PPPoFR

PPP Over Frame Relay

PPR

Periodical Performance Report

PPTP

Point-to-Point Tunneling Protocol

PPVID

Port and Protocol VLAN ID

PQ

Priority Queuing

PQL

Priority Queue List

PRBS

Pseudo Random Bit Sequence

PRF

Pseudo-Random Function

PRI

Primary Rate Interface

PRL

Preferred Roaming List

PS

Protection Switching

PSB

Path State Block

PSC

Protection State Coordination

PSD

Power Spectral Density

PSE

Power Sourcing Equipment

PSK

Pre-Shared Key

PSN

Packet Switched Network

PSNP

Partial SNP

PSNP

Partial Sequence Number PDU

PSST

Principal Switch Selection Timer

PSTN

Public Switched Telephone Network

PTK

Pairwise Transient Key

PTP

Precision Time Protocol

PTY

Pseudo-Terminals

PUK

PIN Unlocking Key

PVC

Permanent Virtual Circuit

PVC PQ

PVC Priority Queuing

PVID

Port Vlan ID

PVP

Permanent Virtual Path

PVST

Per VLAN Spanning Tree

PW

Pseudowire

PW-ACH

PW Associated Channel Header

PWE3

Pseudo Wire Emulation Edge-to-Edge

PXE

Preboot eXecution Environment

Q

Return

QoS

Quality of Service

QPPB

QoS Policy Propagation Through the Border Gateway Protocol

R

Return

RA

Router Alert

RA

Registration Authority

RA

Router Advertisement

RADIUS

Remote Authentication Dial-In User Service

RAGG

Route-Aggregation

RAI

Remote Alarm Indication

RALM

RADIUS Authenticated Login Using MAC-address

RAS

Registration, Admission, and Status

RB

Routing Bridge

RBAC

Role Based Access Control

RCA

Release Change Authorization

RD

Route Distinguisher

RD

Routing Domain

RDI

Remote Defect Indication

RDM

Russian Dolls Model

Recommendation

Enhanced Transmission Selection Recommendation Configuration

RED

Random Early Detection

RF Ping

Radio Frequency Ping

RFID

Radio Frequency Identification

RIB

Routing Information Base

RIB

Route Information Base

RIP

Routing Information Protocol

RIP-2

Routing Information Protocol version 2

RIPng

RIP next generation

RLSN

Remote Link Status Notification

RMON

Remote Network Monitoring

ROA

Recognized Operating Agency

RP

Rendezvous Point

RPA

Rendezvous Point Address

RPF

Reverse Path Forwarding

RPL

Rendezvous Point Link

RPR

Resilient Packet Ring

RP-Set

Rendezvous Point Set

RPT

Rendezvous Point Tree

RR

Router Renumber

RR

Receiver Ready

RR

Route Reflector

RR

Reflective Relay

RRI

Reverse Route Injection

RRM

WLAN Radio Resource Management

RRPP

Rapid Ring Protection Protocol

RRPPDU

Rapid Ring Protection Protocol Data Unit

RS

Router Solicitation

RSB

Reservation State Block

RS-DCC

Resource-Shared DCC

RSH

Remote Shell

RSN

Robust Security Network

RSNA

Robust Security Network Association

RSOH

Regenerator Section Overhead

RSSI

Received Signal Strength Indication

RSTP

Rapid Spanning Tree Protocol

RSVP

Resource Reservation Protocol

RTC

Remote Terminal Connection

RTCP

Real-time Transport Control Protocol

RTE

Route Table Entry

RTM

Real-Time Event Manager

RTP

Real-time Transport Protocol

RTPQ

Real-time Transport Protocol Priority Queuing

RTS

Request to Send

RTSP

Real Time Streaming Protocol

RTT

Round-trip Time

RTT

Round Trip Time

rt-VBR

Real-time Variable Bit Rate

RU

Rack Unit

S

Return

S/MIME

Secure/Multipurpose Internet Mail Extensions

SA

Source Active

SA

Suppress-Advertisement

SA

Security Association

SABM

Set Asynchronous Balanced Mode

SAFI

Subsequent Address Family Identifier

SAII

Source Attachment Individual Identifier

SAN

Storage Area Networks

SAP

Service Advertising Protocol

SAR-PDU

Segmentation and Reassembly Protocol Data Unit

SATOP

Structure-Agnostic TDM over Packet

SAVI

Source Address Validation

SB

Service Bridge

SBM

Subnetwork Bandwidth Management

SCCP

Skinny Client Control Protocol

SCEP

Simple Certificate Enrollment Protocol

SCFF

Single Choke Fairness Frame

SCR

Sustainable Cell Rate

SD

Signal Degrade

SDH

Synchronous Digital Hierarchy

SDLC

Synchronous Data Link Control

SDMF

Single Data Message Format

SDP

Session Description Protocol

SDSL

Symmetric Digital Subscriber Line

SDU

Service Data Unit

SE

Shared-Explicit

SEF

Severely Errored Frame

SF

Signal Fail

SF

Super Frame

SFC

Stage Fabric Configuration Update

sFlow

Sampled Flow

SFM

Source-Filtered Multicast

SFP

Small Form-factor Pluggable

SFP+

SFP Plus

SFTP

Secure FTP

SHA

Secure Hash Algorithm

SIP

Session Initiation Protocol

SIPS

SIP secure

SIP-T

SIP for Telephones

SLA

Service Level Agreement

SLAAC

Stateless Address Autoconfiguration

SLC

Service Logic Control

SLIC

Subscriber Line Interface Circuit

SLIP

Serial Line Internet Protocol

SMB

Standby Main Board

SMTP

Simple Mail Transfer Protocol

SN

Serial Number

SNA

System Network Architecture

SNAP

Subnetwork Access Protocol

SNAT

Source Network Address Translation

SNMP

Simple Network Management Protocol

SNP

Sequence Number PDUs

SNPA

Subnetwork Point of Attachment

SNR

Signal-to-Noise Ratio

SNTP

Simple NTP

SNTP

Simple Network Transfer Protocol

SOH

Section Overhead

SONET

Synchronous Optical Network

SoO

Site of Origin

SP

Strict Priority

SP

Service Provider

SPCS

Stored Program Control Switching System

SPE

Superstratum PE or Service Provider-end PE

SPF

Shortest Path First

SPI

Security Parameter Index

SPID

Service Profile Identification

SPT

Shortest Path Tree

SQL

Structured Query Language

SR/TLB

Source-route Translational Bridging

SRB

Source-Route Bridging

Srefresh

Summary Refresh

SRPU

Switching and Routing Processing Unit

srTCM

single rate TCM

SRTP

Secure Real-time Transport Protocol

SSA

SIP Stack Adapt

SSH

Secure Shell

SSID

Service Set Identifier

SSL

Secure Sockets Layer

SSM

Synchronization Status Marker

SSM

Source-Specific Multicast

SSP

Switch-to-Switch Protocol

ST

Shared Tree

STAC-LZS

STAC Lempel-Ziv Standard

Stelnet

Secure Telnet

STP

Spanning Tree Protocol

STR

Switch Trace Route

SVC

Static Virtual Circuit

SVC

Switched Virtual Circuit

SVP

SpectraLink Voice Priority

Syslog

System Log

T

Return

TA

Terminal Adapter

TACACS

Terminal Access Controller Access Control System

TACL

Temporary Access Control List

TAI

International Atomic Time

TAII

Target Attachment Individual Identifier

TC

Topology Checksum

TC

Traffic Class

TC

Transparent Clock

TCI

Tag Control Information

Tcl

Tool Command Language

TCN BPDU

Topology Change Notification BPDU

TDM

Time Division Multiplexing

TE

Traffic Engineering

TEC

Thermoelectric Cooler

TEDB

TE DataBase

TFC

Traffic Flow Confidentiality

TFTP

Trivial File Transfer Protocol

TKIP

Temporal Key Integrity Protocol

TLP

Transport Layer Protocol

TLS

Transport Layer Security

TLS

Transparent LAN Service

TLV

Type/Length/Value

ToS

Type of Service

TP

Topology Protection

TP

Traffic Policing

TPC

Transmit Power Control

TPDU

Transport Protocol Data Unit

TPID

Tag Protocol Identifier

TPMR

Two-Port MAC Relay

TRILL

TRansparent Interconnection of Lots of Links

TRIP

Triggered RIP

trTCM

two-rate TCM

TS

Time Slot

TS

Traffic Shaping

TST

Test

TTL

Time to Live

TTLS

Tunneled Transport Layer Security

TTY

True Type Terminal

TU

Time Unit

TU

Tributary Unit

TUG

Tributary Unit Group

TXOPLimit

Transmission Opportunity Limit

U

Return

U/L

Universal/Local

UA

Unnumbered Acknowledge

UA

User Agent

UAC

User Agent Client

U-APSD

Unscheduled Automatic Power-Save Delivery

UAS

User Agent Server

UBR

Unspecified Bit Rate

UDLD

Uni-directional Link Direction

UDP

User Datagram Protocol

UFC

Update Fabric Configuration

UIM

User Identity Module

UNI

User Network Interface

UPE

Underlayer PE

UPE

Underlayer PE or User-end PE

UPE

User facing-Provider Edge

URL

Uniform Resource Locator

uRPF

Unicast Reverse Path Forwarding

USB

Universal Serial Bus

USK

Unicast Session Key

USM

User-Based Security Model

UTC

Coordinated Universal Time

UTM

Unified Threat Management

V

Return

VA

Virtual Access

VAD

Voice Activity Detection

VAM

VPN Address Management

VBD

Voice Band Data

VC

Virtual Container

VC

Virtual Circuit

VCC

Virtual Circuit Connection

VCCV

Virtual Circuit Connectivity Verification

VCI

Virtual Channel Identifier

VCN

Virtual Circuit Number

VCPM

Voice Co-processing Module

VCT

Virtual Cable Test

VCX

Voice Core Exchange

VD

Virtual Device

VDP

VSI Discovery and Configuration Protocol

VDSL

Very High-rate Digital Subscriber Line

VE

Virtual Ethernet

VE-Bridge

Virtual Ethernet Bridge

VF Owner

Virtual Forwarder Owner

VFC

Virtual Fiber Channel

VJ TCP/IP

V. Jacobson Compressing TCP/IP

VLAN

Virtual Local Area Network

VMM

Virtual Machine Management

VN

Version Number

VNC

Virtual Network Computing

VoD

Video on Demand

VoFR

Voice Over Frame Relay

VoIP

Voice over IP

VP

Virtual Path

VPC

Virtual Path Connection

VPDN

Virtual Private Dial-up Network

VPI

Virtual Path Identifier

VPLS

Virtual Private LAN Service

VPM

Voice Processing Module

VPN

Virtual Private Network

VRF

Virtual Routing and Forwarding

VRRP

Virtual Router Redundancy Protocol

VSAN

Virtual Storage Area Network

VSI

Virtual Switch Instance

VSI

Virtual Station Interface

VSIP

Virtual Service IP

VT

Virtual Template

VTP

VLAN Trunking Protocol

VTY

Virtual Type Terminal

W

Return

WAI

WLAN Authentication Infrastructure

WAN

Wide Area Network

WAPI

WLAN Authentication and Privacy Infrastructure

WDS

Wireless Distribution System

WEP

Wired Equivalent Privacy

WFQ

Weighted Fair Queuing

WIDS

Wireless Intrusion Detection System

WiNet

Wisdom Network

WINS

Windows Internet Naming Service

WIPS

Wireless Intrusion Prevention System

WLAN

Wireless Local Area Network

WMM

Wi-Fi Multimedia

WPA

Wi-Fi Protected Access

WPAD

Web Proxy Auto-Discovery

WPI

WLAN Privacy Infrastructure

WRED

Weighted Random Early Detection

WRR

Weighted Round Robin

WWN

World Wide Name

X

Return

X2T

X.25 to TCP Switch

XFP

10-Gigabit Small Form-factor Pluggable

XML

Extensible Markup Language

XOT

X.25 Over TCP

XSD

XML Schema Document

XSD

XML Schema Definition

Z

Return

ZBR

Zone Border Router