IBM SY27-0345-06 manual Post

MTU .

Maximum

transmission

unit.

POST .

Power-on self-test.

N

PPP .

Point-to-Point

Protocol.

problem

determination

.

The

process

of

determining

NetBIOS .

Network

Basic

Input/Output

System. Anthe

source

of

a

problem;

for

example,

a

program

operating

system

interface

for

application

programs

ponent, machine failure, telecommunication facilities,

used

on

IBM

personal computers

that

are

attached

to

programs

or

equipment,

the

IBM

Token-Ring

Network. See

BIOSalso.

user or contractor-installed

environmental

failure

such

as

a

power loss,

or

user

network .

error.

(1) A

configuration

of

data processing

devices

and

software

connected

for

information

inter-

In

a

computer,

a

functional

unit

that

i

processor

.

change.

(2) A

group

of

nodes

and

the

links

intercon-

and executes instructions. A processor consist

necting

them.

prets

of

at

least

an

instruction

control

unit

and

an

arit

network

administrator

and

logic

unit. (T)

.

A

person

who manages

the

use

and

maintenance

of

a

network.

Q

O

queue .

A

list

constructed

and

maintained

so

that

t

Open

Systems

Interconnection

(OSI)

next

data

element

to be

retrieved

is

the

one

st

.

(1) The

inter-first.

(T)

connection of open systems in

accordance

with

stand-

ards of the International Organization for

R

Standardization

(ISO)

for

the

exchange

of

information.

(T)

(A) (2)

The use of standardized proce-

random

access

memory

(RAM)

.

(1) A

storage

device

dures to enable the interconnection of data processing

systems.

in

which

data

can

be

written

and read.

(2) A

stor

Note:

OSI

architecture

establishes

a

device into

which

data is

entered

and

from

which

framework

for

in

a

nonsequential

manner.

(3) Deprecat

coordinating

the

development

of

current

and

is

retrieved

future

term fordirect access storage. (T)device

standards for the interconnection of computer systems.

Network

functions

are

divided

into

seven

layers. Each

(ROM)

.

(1) A

storage

device

in

layer represents

a

group

of

related

data

read-only

memory

processing

and

normal

conditions,

can

only

be

re

communication

functions

that

can

be

carried

which

data,

under

out

in

a

standard

way

to

support

different

(T)

(2) Memory in which stored data cannot be mod

applications.

by

the

user except

under

special

conditions

fied

optical

wrap

.

Signal

transmission,

used

ring .

(1) Two

or

more

stations

in

which

information

primarily for

testing,

that

routes

the

signal

from

the

passed sequentially between active stations, each

optical

output

of

examining

or

copying

the

information,

a

device

directly

to

the

optical

input.

station

in

turn

finally

returning

it

to

the

originating ringstation.

(2) S

OSI .

Open

Systems

Interconnection.

network.

P

ring

network

.

(1) A

network

in

which

every

node

has

exactly two branches connected to

it

and

in

which

are

exactly

two

paths

between

any

two

nodes. (T)

(2)A network configuration in which devices are co

Point-to-Point Protocol (PPP) . A protocol that pro-

vides router-to-router

and

host-to-host

network

nected

by unidirectional transmission

links to

form

a

con-

path.

closed

nections over both synchronous and asynchronous

circuits.

ROM .

Read-only

memory. (A)

port .

(1) An

access

point

for data

entry

or

exit.

(2) A

connector

on

a device

to

which

cables

router

.

(1) A computer that determines the path of

for other

devices

made

f

such

as

display

stations

and

printers

are

network

traffic flow. The path selection is

attached.

Synonymous

with socket.

(3) The

representation

of

several paths based on information obtained from sp

a

protocols, algorithms that attempt to identify

physical

connection to

the

link

hardware. A

cific

port

is

sometimes

referred

to

as

an

adapter;

shortest or best path, and other criteria such a

however,

there

(2) An

can

be

more

than

one

port on

an

or protocol-specific destination addresses.

adapter. There

may

device

that connects two

LAN segments,

be one

or

more

ports

controlled

by

a

attaching

single

DLC

use similar or different architectures, at

process.

which

Glossary

X-5