ITEC90 (EBOOK)

Question 1

the internet model consists of layers

Answer 1

seven

Question 2

the process to process delivery of the entire message is the responsibility of

Answer 2

transport layer

Question 3

tyhe layer closest to transport medium

Answer 3

physical

Question 4

Mail services are available to the network user through the ………………….layer.

Answer 4

application

Question 5

as the data packet moves headers are

Answer 5

added

Question 6

as the data packet moveslower headers are

Answer 6

removed

Question 7

the layer lies between the network layer and the application layer

Answer 7

transport

Question 8

the layer lies between the network layer and the application layer

Answer 8

transport

Question 9

Layer 2 lies between the physical layer and the _______ layer.

Answer 9

network

Question 10

layer changes bits into electromagnetic signals

Answer 10

Physical layer

Question 11

he physical layer is concerned with the movement of over the physical medium.

Answer 11

Bits

Question 12

Which layer functions as liaison between user support layers and network support layers ?

Answer 12

transport layer

Question 13

What is the main function of transport layer?

Answer 13

process to process delivery

Question 14

Which of the Following Is an Application Layer Service?

Answer 14

(a) File transfer(b) Remote login(c) Mail service(d)

Question 15

A _______ is the physical path over which a message travels.

Answer 15

MEDIUM

Question 16

the information to be communicated in a data communications system is the

Answer 16

MESSAGE

Question 17

Frequency of failure and network recovery time after a failure is measures of the ____________ of a network.

Answer 17

RELIABILITY

Question 18

Checking an unauthorized user in a network is a ……………issue.

Answer 18

SECURITY

Question 19

Which topology requires a central controller or hub.

Answer 19

STAR

Question 20

which topology requires a multipoint connection

Answer 20

BUS

Question 21

communication between a computer and a keyboard involves

Answer 21

SIMPLEX

Question 22

In a network with 25 computers, which topology would require most extensive calling

Answer 22

Mesh

Question 23

a television broadcast is an example of ____ transmission error

Answer 23

SIMPLEX

Question 24

connection provides a dedicated link between two devices

Answer 24

Point-to-Point

Question 25

In a ......................... connection more than two devices can share a single link.

Answer 25

MULTIPOINT

Question 26

In .......................... transmission the channel capacity is shared by both communication devices at all times.

Answer 26

FULL DUPLEX

Question 27

A cable break in which topology stops all transmission

Answer 27

BUS

Question 28

Which organisation has authority over interstate and international commerce in the communication field.

Answer 28

FCC