IBM SY27-0345-06 manual Utp

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