1

H3C network technology acronyms

# 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 Attachment Circuit

AC Access Category

AC Access Controller

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

2

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 Application Specific Packet Filter

ASPF Advanced Stateful Packet Filter

AT AppleTalk

ATD Attribute Discovery

ATM Asynchronous Transfer Mode

ATM Auto Teller Machine

AU Administration Unit

AUG Administrative Unit Group

AUG Administration Unit Group

AU-PTR Administration Unit Pointer

AVF Active Virtual Forwarder

AVF Appointed VLAN-x 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 Bandwidth Constraint

BC Boundary Clock

BCB Backbone Core Bridge

BDI Backward Defect Indication

3

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

4

CBS Committed Burst Size

C-BSR Candidate-BSR

CBT Core-Based Tree

CBWFQ Class Based Weighted Fair Queuing

CC Call Control

CC Control Channel

CC Continuity Check

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 Calling Line Identification

CLI Command Line Interface

CLNP Connection-Less Network Protocol

CLP Cell Loss Priority

CLV Code-Length-Value

5

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 SNP

CSNP Complete Sequence Number PDU

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

6

DCBX Data Center Bridging Exchange Protocol

DCC Dial Control Center

DCD Data Carrier Detection

DCE Data Circuit-terminating Equipment

DCE Data Center Ethernet

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 Direct Inward Dialing

DID Device ID

DiffServ Differentiated Service

DIS Designated IS

DLCI Data Link Connection Identifier

DLDP Device Link Detection Protocol

DLSw Data Link Switching

DM Delay Measurement

DM Diagnostic and Monitoring

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

7

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

8

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

ECT Equal Cost Tree

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

9

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

10

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

11

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 BGP

IBGP Internal Border Gateway Protocol

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

12

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

13

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 Logical Link Control

LLC Lower Layer Compatibility

LLC Link Local Signaling

LLC2 Logical Link Control Type 2

LLDP Link Layer Discovery Protocol

14

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 Label Range

LR Line Rate

LSA Link State Acknowledgment

LSA Link State Advertisement

LSAck Link State Acknowledgment

LSDB Link State DataBase

LSP Label Switched Path

LSP Link State Packet

LSP Link State PDU

LSPDU Link State Protocol Data Unit

LSR Label Switching Router

LSR Link State Record

LSR Link State Request

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

15

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 Maintenance Domain

MD Multicast 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 Merge Point

MP Maintenance Point

16

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 Configuration

MQC Modular QoS Command

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

17

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

18

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

19

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

20

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

21

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

22

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

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

23

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 Suppress-Advertisement

SA Source Active

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

24

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 Super Frame

SF Signal Fail

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

25

SP Service Provider

SP Strict Priority

SPBM Shortest Path Bridging MAC Mode

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 Source-Specific Multicast

SSM Synchronization Status Marker

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 Switched Virtual Circuit

SVC Static 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

26

TC Topology Checksum

TC Transparent Clock

TC Traffic Class

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

27

U/L Universal/Local

UA User Agent

UA Unnumbered Acknowledge

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 or User-end PE

UPE User facing-Provider Edge

UPE Underlayer PE

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

28

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 Station Interface

VSI Virtual Switch Instance

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

29

WINS Windows Internet Naming Service

WIPS Wireless Intrusion Prevention System

WLAN Wireless Local Area Network

WLAN RRM WLAN Radio Resource Management

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