Transmission

Control

Protocol/Internet

Protocol

 

 

 

 

 

 

 

public

communication

facilities. (T)

(2) A

data

commu-

(TCP/IP) .

(1) A

set

of

 

protocols

that

allow

cooperatingnicationsnetwork

designed

to

serve an area of hun

computers to share resources across a heterogeneousdredsor

 

thousands of miles; for example, public a

network. (2) A set of communication protocols thatprivate packet-switching

networks,

and national

tele-

support peer-to-peer connectivity

 

functions

forphonebothnetworkslocal . Contrast

localwith

area

network

 

 

 

 

and

wide

area

networks.

 

 

 

 

 

 

 

 

 

(LAN)

 

and metropolitan

area

network. (MAN)

 

 

 

 

 

twisted

pair .

 

A

transmission

medium

 

that

consistsworkstationof

.

A

functional

unit

at which a user works

two insulated electrical conductors twisted togetherAworkstatiton often has

some

processing

 

 

 

 

 

reduce noise.

(T)

 

 

 

 

 

 

 

 

 

 

 

 

capability.

(T)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

wrap

test.

 

A

test

that

checks

attachment

 

or

control

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

unit circuitry without checking the mechanism itself

unshielded

twisted

pair

(UTP)

 

 

 

 

 

 

 

 

 

 

 

returning

the

output

of

the

mechanism

as

input;

for

 

.

Seetelephone

twisted example,

when

unrecoverable

communication

adapter

 

pair.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

or machine errors occur, a wrap test can transmit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

specific

character

pattern

to or through the mode

V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

loop

 

and

then

compare

the

character

pattern

recei

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with

 

the

 

pattern

transmitted.opticalSee

alsowrap.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

V.24 .

 

In

 

data

communications,

a

 

specification

of

the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CCITT

that

 

defines

the

list

 

of

 

definitions

for

interchange

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circuits

between

data

terminal

equipment

 

X

and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(DTE)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

data

circuit-terminating

equipment

 

(DCE).

 

 

X.21.

 

An International Telegraph and Telephone

 

 

V.25 .

 

In

 

data

communications,

a

 

 

 

 

 

Consultative

 

Committee

(CCITT)

recommendation

for

a

 

 

 

specification

of

the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

equ

ITU-TS

 

that

defines

the

automatic

answering

general-purpose interface between data terminal

 

equipment

data

circuit-terminating

equipment

for syn-

and

parallel

automatic

calling

equipment

on

 

ment

 

and

the

General

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

chronous operations on a public data network.

 

 

Switched Telephone Network, including procedures for

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

disabling

echo

controlled

devices

for

both

manually

and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

automatically

established

calls.

 

 

 

 

 

 

X.25 . An International Telegraph and Telephone

 

 

 

 

 

 

 

 

Consultative Committee (ITU-TS)

recommendation

for

 

V.35 .

 

In

 

data

communications,

a

 

 

 

 

 

the

 

interface

 

between

data

terminal

equipment

and

 

 

specification

of

the

 

 

 

data

networks. Seepacketalso

 

 

 

 

CCITT

that

 

defines

the

list

 

of

definitions

packet-switched

 

 

 

 

 

 

for

interchange

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circuits

between

data

terminal

equipment

 

switching.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(DTE)

and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

data

circuit-terminating

equipment

 

(DCE)

at

various

 

data

Services

(XNS)

 

.

 

A

Xerox

Network

 

 

 

rates.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Xerox

Network

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Services protocol. This term collectively describes

V.36 .

 

In

 

data

communications,

a

 

 

 

 

 

suite

of

 

internet

protocols

 

developed

by

the

Xero

 

 

specification

of

the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CCITT

that

 

defines

the

list

 

of

 

definitions

poration. Although similar to TCP/IP protocols, XNS

 

 

 

 

for

interchange

 

 

 

 

 

 

 

 

 

 

 

 

 

 

circuits

between

data

terminal

equipment

 

uses different packet formats and terminology. See

(DTE)

and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

data circuit-terminating equipment

 

(DCE)

at

 

also IPX.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

rates

of

48,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

56,

64,

or

72

kilobits

 

per

second.

 

 

 

 

XNS .

 

Xerox

Network

Services.

 

 

 

 

 

 

 

vital

product

data

(VPD) .

 

Product

identification

infor-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mation

that

describes

 

the

hardware

and

software

com-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Z

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ponents

in

the

product.

VPD

 

is

used to assist in asset

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and

inventory

control,

performing

problem

determizone- .

 

A

logical grouping of hosts within the AppleT

nation, identifying service levels, and ensuringinteprnetoper. A zone name

is

a

32

ASCII

character

str

hardware

and

software

compatibility

 

levels.

that

 

identifies

each

node.

 

 

 

 

 

 

 

 

W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WAN .

 

Wide

area

network.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

wide

area

network

(WAN)

 

.

 

(1) A

 

network

 

that

pro-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

vides communication services to a geographic area

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

larger than that served by a local area network or a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

metropolitan

area

network,

and

that

may

use

or

provide

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Glossary

X-7

 

 

 

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