Dictionary: Datacommunications

TITLE

Table of Contents

1

1 out of n code

2

2 binary 1 quaternary (2B1Q)

3

3 in 4 encoding

4

4 binary, 3 ternary (4B/3T)

4 binary, 5 binary (4B75B)

4 ternary plus (4T+)

5

5 binary, 6 binary (5B/6B)

6

60 GHz frequency band

64B/66B encoding

7

7 bit code

733 format

7E frame format

8

8 binary, 10 binary (8B/10B)

8 binary, 6 ternary (8B/6T)

8 bit code

822 format

A

abnormal end (Abend)

abort

abrupt release

abstract service primitive (ASP)

abstract syntax

abstract syntax notation one (ASN.1)

acceptance test

access method

access point control protocol (APCP)

access rate (AR)

access request

acknowledgment (ACK)

acknowledgment flag (ACK)

acknowledgment number

active

active directory service (ADS)

adaptive coding and modulation (ACM)

adaptive delta modulation (ADM)

adaptive delta pulse code modulation (ADPCM)

adaptive differential delta pulse code modulation (ADDPCM)

adaptive Internet protocol (AIP)

adaptive multirate (AMR)

address (A)

address field (AF)

address resolution protocol (ARP)

addressing

administration management domain (ADMD)

advanced audio coding (AAC)

advanced data communication control procedure (ADCCP)

A-law method

algebraic code excited linear prediction (ACELP)

algorithm

allocation

alternate mark inversion (AMI)

american standard code for information interchange (ASCII)

amplification

amplitude modulation (AM)

amplitude modulation phase shift keying (AM-PSK)

amplitude shift keying (ASK)

analog intensity modulation (AIM)

angström

anisynchronous

AppleTalk

AppleTalk data stream protocol (ADSP)

AppleTalk echo protocol (AEP)

AppleTalk filing protocol (AFP)

AppleTalk filing protocol (ATFP)

AppleTalk remote access protocol (ARAP)

AppleTalk session protocol (ASP)

AppleTalk transaction protocol (ATP)

AppleTalk update-based routing protocol (AURP)

application binary interface (ABI)

application context (AC)

application control access protocol (ACAP)

application control service element (ACSE)

application entity (AE)

application layer (APL)

application process (AP)

application protocol data unit (APDU)

application service

application service element (ASE)

application service level agreement (ASLA)

application/communication (APPLI/COM)

arbitration

ARPA service

artefact

assigned number

association control service element (ACSE)

asymmetric phase shift keying (APSK)

asymmetrical encryption

asynchronous

asynchronous communication server (ACS)

asynchronous simultaneous voice and data (ASVD)

asynchronous time division (ATD)

asynchronous time division multiplexing (ATDM)

asynchronous traffic

attenuation (ATT)

audio codec (AC)

audio compression

audio interchange file format compressed (AIFC)

audio protocol

authority and format identifier (AFI)

auto login

automatic repeat request (ARQ)

autonomous system (AS)

auto-responding equipment (AAE)

auxiliary (AUX)

B

back channel

background intelligent transfer service (BITS)

backspace (BS)

balanced mode

bandwidth (BW)

bandwidth allocation control protocol (BACP)

bandwidth allocation protocol (BAP)

bandwidth efficiency

Base64 code (Base64)

baseband (BB)

basic encoding rules (BER)

baud (Bd)

BCD interchange code

bell (BEL)

best effort delivery

bidirectional

binary

binary 8 zero substitution (B8ZS)

binary code (BC)

binary coded decimal (BCD)

binary digit (Bit)

binary logarithmic arbitration method (BLAM)

binary offset carrier modulation (BOC)

binary phase shift keying (BPSK)

binary synchronous communication (BSC)

binary system

binary system

binding

bipolar method

biquinary code

bit error

bit error frequency rate

bit error rate (BER)

bit rate (BR)

bit rate adaption

bit stuffing

bit synchonisation (BS)

bit transparency

bit-oriented protocol (BOP)

bits per second (bps)

block check character (BCC)

block check sequence (BCS)

block cipher

block error rate (BLER)

block length

block numbering

block sum check

blocking signal (BLO)

bootstrap protocol (BootP)

border gateway multicast protocol (BGMP)

border gateway protocol (BGP)

bounce

breakout box

bridge protocol data unit (BPDU)

broadband

broadband transmission

broadband transmissions

broadcast (BC)

broadcast storm

burst

bus topology

business transaction protocol (BTP)

byte (B)

byte control protocol (BCP)

byte parallel

byte per second (Bps)

byte serial

C

cache array routing protocol (CARP)

call control procedure

cancel (CAN)

carrier to interference ratio (C/I)

carrier wave (CW)

carrierless amplitude-phase modulation (CAP)

cell

centronics parallel interface

channel

channel bundling

channel encoding

character

character rate

character stuffing

character synchronization

characters per second (cps)

check bit (CK)

checksum

chirp spread spectrum (CSS)

cipher

circuit switching (CS)

Cisco group management protocol (CGMP)

class of service (CoS)

clear to send (CTS)

client

client server architecture (C/S)

client server protocol

clock (CLK)

clocking

closed user group (CUG)

code

code conversion (CC)

code division multiplexing (CDM)

code element

code excited linear prediction (CELP)

code field

code rate

code transparency

code value

coded character set (CCS)

coded mark inversion (CMI)

coded orthogonal frequency division multiplex (COFDM)

coder-decoder (CODEC)

codeword

coding

coherence length

collision

commitment, concurrency and recovery (CCR)

commitment, concurrency and recovery service element (CCRSE)

common application service elements (CASE)

common mail calls (CMC)

common management information protocol (CMIP)

communication protocol

communication system

communications applications specification (CAS)

compatibility

compliance

compressed real time protocol (CRTP)

compression

compression control protocol (CCP)

compression rate

concatenate

conection termination

confirmation (CONF)

conformance testing (CT)

congestion control

connection

connection oriented (CO)

connection oriented network service (CONS)

connection type

connectionless (CL)

connectionless network protocol (CLNP)

connectionless network service (CLNS)

connectionless transport protocol (CLTP)

connectionless transport service (CLTS)

contention

contention mode

context based adaptive binary arithmetic coding (CABAC)

continuous phase frequency shift keying (CPFSK)

continuous variable slope delta modulation (CVSD)

control character (CC)

control flag field

control procedure

convergence protocol (CP)

converter

convolution code (CC)

cross check

cross gain modulation (XGM)

cryptography

cut through

cyclic redundancy checksum (CRC)

D

data block

data communication equipment (DCE)

data communications

data frame

data link (DL)

data link escape (DLE)

data link layer (DLL)

data offset (DAO)

data packet

data rate

data reduction

data set ready (DSR)

data stream

data terminal equipment (DTE)

data terminal ready (DTR)

data throughput

data transfer rate

data transmission (DT)

data transmission

datagram

datagram delivery protocol (DDP)

datagram length

datagram service

datagram transport protocol (DTP)

daytime protocol

decibel (dB)

decibel isotrop (dBi)

decibel mW (dBm)

decibel unloaded (dBu)

decibel W (dBW)

decimal system

decoder (DEC)

decryption

delay (DEL)

delete (DEL)

delimiter

delta modulation (DM)

demand priority protocol (DPP)

demultiplex (DMUX)

depacketizing

desktop communication protocol (DCOP)

destination address field (DAF)

destination port (DP)

device control (DC)

dialog

dibit

differential biphase coding (DBP)

differential group delay (DGD)

differential manchester coding

differential minimum shift keying (DMSK)

differential phase shift keying (DPSK)

differential pulse code modulation (DPCM)

differential quaternary phase shift keying (DQPSK)

differential service code point (DSCP)

differential signal

digit (DGT)

digital data communications message protocol (DDCMP)

digital private network signalling system (DPNSS)

digital signal (DS)

digram

direct call

directed broadcast address

directory (DIR)

directory access protocol (DAP)

directory operational binding management protocol (DOP)

directory service (DS)

directory system protocol (DSP)

discrete cosine transformation (DCT)

discrete Fourier transformation (DFT)

discrete multi tone (DMT)

distance vector multicast routing protocol (DVMRP)

distinguished encoding rule (DER)

distributed file system (DFS)

distributed sample scrambler (DSS)

DoD protocol

double-current technique

download

dropout (DO)

duplex (Dx)

dynamic adaptive multi-carrier quadrature amplitude modulation (DAM-QAM)

dynamic network address translation (DNAT)

dynamic routing

E

echo

echo cancellation (EC)

echo mail

echo protocol

echoplex

EDI standards

EGP type

electronic data interchange (EDI)

electronic data interchange for administration, commerce and transport (EDIFACT)

electronic mail (E-mail)

e-mail address

encapsulation

encoding

encryption

encryption method

end of file (EOF)

end of transmission (EOT)

end system (ES)

end system connection

end system to intermediate system protocol (ES-IS)

enhanced interior gateway routing protocol (EIGRP)

enquiry (ENQ)

envelope

epoch date

equivalent isotropically radiated power (EIRP)

equivalent radiated power (ERP)

erlang (Erl)

error control (EC)

error correcting code (ECC)

error detection code (EDC)

error free seconds (EFS)

error message

error protection method

error rate

error ratio

error second (ES)

error vector magnitude (EVM)

escape character (ESC)

EtherTalk link access protocol (ELAP)

EuroFile transfer (EFT)

event

excess 3 code

extended binary coded decimal (EBCD)

extended binary coded decimal interchange code (EBCDIC)

extended Internet protocol (EIP)

extended SMTP (ESMTP)

exterior gateway protocol (EGP)

exterior routing protocol (ERP)

external data representation (XDR)

extremely high frequency (EHF)

eye pattern

F

fast fourier transformation (FFT)

fast frequency shift keying (FFSK)

fibre channel protocol (FCP)

FidoNet

FidoNet address

field strength (F)

file

file transfer (FT)

file transfer protocol (FTP)

file transfer, access, and management (FTAM)

final flag (FIN)

finger protocol

flag (F)

flow control

flow label

for your information (FYI)

format effector (FE)

forward channel

forward error correction (FEC)

Foundry standby router protocol (FSRP)

Fourier transformation (FT)

fragment free technique

fragment offset

frame

frame check sequence (FCS)

frequency (f)

frequency band

frequency division multiplexing (FDM)

frequency economy

frequency hopping spread spectrum (FHSS)

frequency modulation (FM)

frequency range

frequency response

frequency shift keying (FSK)

G

gap

GARP multicast registration protocol (GMRP)

gateway protocol

gateway to gateway protocol (GGP)

gaussian frequency shift keying (GFSK)

gaussian minimum shift keying (GMSK)

general inter-ORB protocol (GIOP)

generalized multi protocol label switching (GMPLS)

generic attribute registration protocol (GARP)

giga bits per second (Gbps)

gigabyte (GB)

H

half duplex (HDx)

hamming code

hamming distance

handshake

handshaking

header (HDR)

header checksum (HCS)

hello protocol

hertz (Hz)

high density bipolar (HDB)

high frequency engineering

high performance computing and communications (HPCC)

holding time

hop limit

host monitor protocol (HMP)

hosting service provider (HSP)

hot potato

hot standby router protocol (HSRP)

Huffman encoding

hybrid encryption

hypertext caching protocol (HTCP)

hypertext transfer protocol (HTTP)

I

ICMP header

ICMP router discovery protocol (IRDP)

idempotent

identification

identification filed

image compression

immission

implication

incompatibility

inconsistency

increment

indication (IND)

industrial, scientific, and medical (ISM)

information

information security

infrared (IR)

initialization

instant messaging and presence protocol (IMPP)

inter symbol interference (ISI)

interdomain policy routing (IDPR)

interdomain routing protocol (IDRP)

interface (I/F)

interface data unit (IDU)

interface definition language (IDL)

interference (I)

interim interswitch signalling protocol (IISP)

interior gateway protocol (IGP)

interior gateway routing protocol (IGRP)

intermediate system to intermediate system protocol (IS-IS)

intermodulation (IM)

international alphabet 2 (IA2)

international alphabet 5 (IA5)

international telegraph alphabet (ITA)

Internet cache protocol (ICP)

Internet content adaption protocol (ICAP)

Internet control message protocol (ICMP)

Internet fibre channel protocol (iFCP)

Internet group management protocol (IGMP)

Internet inter-ORB protocol (IIOP)

Internet message access protocol (IMAP)

Internet message support protocol (IMSP)

Internet printing protocol (IPP)

Internet protocol (IP)

Internet protocol performance metric (IPPM)

Internet protocol version 4 (IPv4)

Internet protocol version 6 (IPv6)

internetwork datagram protocol (IDP)

internetworking

interprocess communication (IPC)

interrupt (INT)

inverse discrete cosine transform (IDCT)

inverse Fourier transformation (IFT)

IP flow management protocol (IFMP)

IP header

IP header length (IHL)

IP next generation (IPnG)

IrDA link access protocol (IrLAP)

IrDA link management protocol (IrLMP)

irrelevance

isarithmic

isochronous transmission

J

jitter

job transfer and manipulation (JTM)

joint photographics expert group (JPEG)

JPEG 2000

K

Karn's algorithm

Kermit

L

label

label distribution protocol (LDP)

label switching

LAN management protocol (LMP)

layer

layer 2 tunneling protocol (L2TP)

layer model

Lempel, Ziv (LZ)

Lempel, Ziv, Storer, Szymanski (LZSS)

Lempel, Ziv, Welsh (LZW)

level

library management protocol (LMP)

lightweight directory access protocol (LDAP)

lightweight phone control protocol (LPCP)

line

line printer daemon (LPD)

linear predictive coding (LPC)

link access procedure (LAP)

link access procedure balanced (LAP B)

link access procedure D (LAP D)

link access protocol Bm (LAP-Bm)

link access protocol for Dm channel (LAP-Dm)

link access protocol for modems (LAP M)

link access protocol SDH (LAPS)

link control protocol (LCP)

link management protocol (LMP)

link manager protocol (LMP)

link protocol

link service

link state protocol (LSP)

local area transport protocol (LAT)

local oscillator frequency (LOF)

logical channel

logical link (LL)

login

logout

long term prediction (LTP)

longitudinal parity check (LPC)

longitudinal redundancy check (LRC)

loopback

lossless data compression

lossy data compression

low density parity check (LDPC)

lower layer protocol (LLP)

M

mail server

Manchester encoding

manufacturing automation protocol (MAP)

manufacturing message specification (MMS)

Markov encoding

master slave operation

maximum segment size (MSS)

maximum transmission unit (MTU)

media device control protocol (MDCP)

media gateway control protocol (MEGACO)

media gateway control protocol (MGCP)

media management protocol (MMP)

media manager control interface protocol (MMCIP)

media manager interchange protocol (MMIP)

mediation

medium

mega bits per second (Mbps)

meshed topology

message (MSG)

message handling system (MHS)

message switching (MS)

meta directory

metro fibre channel protocol (mFCP)

micro interruption

microcom networking protocol (MNP)

microwave (MW)

migration

minimum shift keying (MSK)

mixed excitation linear predictive (MELP)

modified differential phase shift keying (MDPSK)

modified discrete cosine transformation (MDCT)

modulation

modulation code

more fragments (MF)

motion JPEG (MJPEG)

moving picture experts group (MPEG)

Mowgli data channel protocol (MDCP)

MPEG compression

MPEG-1

MPEG-2

MPEG-4

multi choice precoding (MCP)

multi dimensional multiple access (MDMA)

multi level transmission (MLT)

multi vendor integration protocol (MVIP)

multiband orthogonal frequency division mutlplexing (MB-OFDM)

multicarrier modulation (MCM)

multicast

multicast address dynamic client allocation protocol (MADCAP)

multilan address resolution protocol (MARP)

multilink point to point protocol (MPPP)

multiplex (MPX)

multiplexing

multipoint connection

N

Nagle algorithm

name binding protocol (NBP)

narrowband (NB)

negative acknowledgement (NAK)

neper (Np)

NetWare link services protocol (NLSP)

network architecture

network data management protocol (NDMP)

network element control protocol (NECP)

network file system

network file system (NFS)

network information services (NIS)

network layer

network layer security protocol (NLSP)

network news transfer protocol (NNTP)

network protocol (NP)

network service (NS)

network services protocol (NSP)

network time protocol (NTP)

network virtual terminal (NVT)

neutral current method

next generation telematics protocol (NGTP)

next header

next hop resolution protocol (NHRP)

nibble

node B adaption protocol (NBAP)

non return to zero (NRZ)

non return to zero inverted (NRZ-I)

null character (NUL)

O

object (O)

octal system

offline processing

offset quadrature phase shift keying (OQPSK)

on off keying (OOK)

online processing (OL)

open distributed processing (ODP)

open document architecture (ODA)

open settlement protocol (OSP)

open shortest path first (OSPF)

open systems interconnection (OSI)

options

originate mode

orthogonal

orthogonal frequency division multiplex (OFDM)

OSI protocol

OSI reference model

OSI transport protocol (OSI-TP)

out of band signalling

overhead (OH)

P

P protocols

packet data protocol (PDP)

packet loss

packet loss rate (PLR)

packet switching (PS)

packet switching exchange (PSE)

packetized ensemble protocol (PEP)

PAD characters

padding bit (PAD)

padding length (PL)

PAM5 method

PAM5x5 method

parallel sequence spread spectrum (PSSS)

parallel transmission

parity bit (PY)

parity check (PAR)

path vector protocol

pattern substitution

payload (Pl)

payload length

peer

peer to peer network (P2P)

phase

phase difference modulation (PDM)

phase modulation (PM)

phase shift

phase shift keying (PSK)

physical layer (PL)

ping pong

ping time

placeholder (?)

plesiochronous

point to multipoint (P2MP)

point to point connection (P2P)

point to point tunneling protocol (PPTP)

point-to-point protocol (PPP)

point-to-point radio system

polarization

policy based networking (PBN)

polling

polling mode

port

port number

post office protocol (POP)

power spectral density (PSD)

prefix

presentation layer (P)

pretty good privacy (PGP)

primitive

printer access protocol (PAP)

priority

priority bit (P)

priority field

procedure

product cipher

profile

propagation delay

protocol

protocol control information (PCI)

protocol data unit (PDU)

protocol independent multicast (PIM)

protocol stack

protocol type

pseudo ternary method

pseudocode

PSTN to Internet internetworking (PINT)

public key method

pulse amplitude modulation (PAM)

pulse code modulation (PCM)

pulse duration modulation (PDM)

pulse pause coding (PPC)

pulse width modulation (PWM)

push flag (PSH)

Q

Q classes

quad bit

quadrature amplitude modulation (QAM)

quadrature phase shift keying (QPSK)

quality of service (QoS)

quality of service parameter

quibinary code

R

radio data link access protocol (RD-LAP)

radio frequency interference (RFI)

radio link protocol (RLP)

radio technology

rapid spanning tree protocol (RSTP)

realtime control protocol (RTCP)

realtime streaming protocol (RTSP)

realtime transport protocol (RTP)

reassembly

receive data (RxD)

recovery

redundancy

reed solomon code (RS)

reflection

relative element address destinate (READ)

reliable datagram protocol (RDP)

remote

remote access service (RAS)

remote administration

remote data processing

remote database access (RDA)

remote desktop protocol (RDP)

remote execute (rexec)

remote job entry (RJE)

remote LAN access (RLA)

remote procedure call (RPC)

remote support maintenance

request (REQ)

request for comments (RFC)

request to send (RTS)

residual error rate (RER)

resource reservation protocol (RSVP)

resource reservation protocol traffic engineering (RSVP-TE)

response (RSP)

response time

return to zero code (RZ)

return to zero differential quadrature phase shift keying (RZ-DQPSK)

return to zero inverted (RZ-I)

reverse direction

ring topology

robust header compression (ROHC)

routing

routing information protocol (RIP)

routing protocol

routing table maintenance protocol (RTMP)

routing table protocol (RTP)

RTP header

run length encoding (RLE)

S

sampling rate

scaling

scheduled transfer protocol (STP)

scrambling

search frame

secure MIME (S/MIME)

secure realtime transport protocol (SRTP)

security

security architecture

security association (SA)

segmentation

semi duplex

sender policy framework (SPF)

sensitivity

sequence number (SEQ)

sequenced packet exchange protocol (SPX)

serial interface

serial line Internet protocol (SLIP)

server

server appliance

server based computing (SBC)

service access point (SAP)

service attribute

service data unit (SDU)

service element (SE)

service specific connection oriented protocol (SSCOP)

service user

services model

session

session announcement protocol (SAP)

session description protocol (SDP)

session initiation protocol (SIP)

session initiation protocol for telephones (SIP-T)

session layer

shannon theorem

shared wireless access protocol (SWAP)

shortest path first (SPF)

signal

signal ground (SG)

signal propagation speed

signalling

signalling (SIG)

signalling protocol

simple gateway control protocol (SGCP)

simple gateway monitoring protocol (SGMP)

simple mail transfer protocol (SMTP)

simple management protocol (SMP)

simple network management protocol (SNMP)

simple network management protocol v2 (SNMPv2)

simple network management protocol v3 (SNMPv3)

simple network time protocol (SNTP)

simple object access protocol (SOAP)

simple service discovery protocol (SSDP)

simplex (SX)

socket

socket secure server (SOCKS)

software motion picture (SMP)

soliton waves

source address field

source encoding

source port field (SP)

source routing (SR)

space division multiplexing (SDM)

space time block coding (STBC)

spanning tree protocol (STP)

spatial reuse protocol (SRP)

specific application service element (SASE)

speech compression

speed transparency

splitting

spread spectrum multiple access (SSMA)

star topology

start frame delimiter (SFD)

start of text (STX)

start stop mode

statistical time division multiplexing (STDM)

step

step speed

stop bit

store and forward (SF)

store and forward lockup

stream cipher

stream control transmission protocol (SCTP)

stuffing

subnetwork dependent convergence protocol (SNDCP)

subnetwork independent convergence protocol (SNICP)

subscriber operating class

switching technology

symmetrical encryption

sync bit

synchronization flag (SYN)

synchronized sample scrambler (SSS)

synchronous

synchronous time division multiplexing (STDM)

synchronous transmission

SyncML Initiative

T

TCP header

TCP rate shaping (TRS)

technical office protocol (TOP)

telephony routing information protocol (TRIP)

telnet

telocator data protocol (TDP)

temporal noise shaping (TNS)

terminal emulation

terrestrial

test TCP (TTCP)

text compression

time compressing multiplexing (TCM)

time division multiple access (TDMA)

time division multiplexing (TDM)

time out

time server protocol

time slot (TS)

time to live (TTL)

timeout

timer

topology

trailer

tranmission bandwidth

transfer syntax (TS)

transit system

transmission

transmission control protocol (TCP)

transmission control protocol/internet protocol (TCP/IP)

transmission medium

transmission mode

transmission rate

transmission speed

transmission system

transmission technology

transmission time

transmodulation

transparency

transparent mode

transport layer

transport protocol (TP)

transport protocol data unit (TPDU)

transport service (TS)

tree topology

trellis encoding (TC)

tribit

trivial file transfer protocol (TFTP)

trunking

turbo code

type of service (ToS)

U

unicast

unicode transformation format (UTF)

unidirectional

unisynchronous

universal computer protocol (UCP)

unix to unix copy program (UUCP)

upper layer protocol (ULP)

upper layers

upstream

urgent flag (URG)

urgent pointer

user agent (UA)

user data (UD)

user datagram protocol (UDP)

utilization level

V

validation

version field

vertical redundancy check (VRC)

video codec

video compression

virtual call

virtual channel (VC)

virtual circuit (VC)

virtual LAN (VLAN)

virtual private network (VPN)

virtual router redundancy protocol (VRRP)

virtual terminal (VT)

voice codec

W

wavelength

window size

winsock

wireless datagram protocol (WDP)

wireless session protocol (WSP)

wireless transaction protocol (WTP)

word coding

X

X protocol

X window

Xerox network system (XNS)

Xmodem

XON/XOFF protocol (XON/XOFF)

X-Window version 11 (X11)

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