Computer Networks

Question 1

What is a computer network?

Answer 1

A computer network is a collection of computers and devices connected together to share resources and information.

Question 2

True or False: A LAN (Local Area Network) covers a large geographical area.

Answer 2

False

Question 3

Fill in the blank: A ________ is a device that forwards data packets between computer networks.

Answer 3

router

Question 4

What does the term ‘bandwidth’ refer to in a network?

Answer 4

Bandwidth refers to the maximum rate of data transfer across a network.

Question 5

Which of the following is a common protocol used for web traffic? A) FTP B) HTTP C) SMTP

Answer 5

B) HTTP

Question 6

What is a WAN (Wide Area Network)?

Answer 6

A WAN is a telecommunications network that extends over a large geographical area.

Question 7

What is the primary function of a firewall?

Answer 7

The primary function of a firewall is to monitor and control incoming and outgoing network traffic based on predetermined security rules.

Question 8

Define the term ‘IP address’.

Answer 8

An IP address is a unique identifier assigned to each device on a network that uses the Internet Protocol for communication.

Question 9

True or False: Ethernet is a protocol used for wireless networking.

Answer 9

False

Question 10

What is the purpose of a network topology?

Answer 10

A network topology defines the arrangement of different elements (links, nodes, etc.) in a computer network.

Question 11

Fill in the blank: A ________ network topology connects all devices to a central hub.

Answer 11

star

Question 12

Which device is used to connect multiple devices in a LAN?

Answer 12

Switch

Question 13

True or False: The Internet is an example of a WAN.

Answer 13

True

Question 14

What is the main advantage of using fiber optic cables over copper cables?

Answer 14

Fiber optic cables have a higher bandwidth and can transmit data over longer distances without loss.

Question 15

Which technology uses radio waves for communication?

Answer 15

Wireless networking

Question 16

True or False: TCP is a connection-oriented protocol.

Answer 16

True

Question 17

State 2 advantages of a computer network

Answer 17

•File sharing
•Hardware Sharing
•Communication
•Centralised Updates and Security

Question 18

State 2 disadvantages of computer networks

Answer 18

•Cost
•Spread of malware
•Hacking
•Management

Question 19

LAN definition + an example

Answer 19

Network confined to one site
School or in homes

Question 20

Wan definition + example

Answer 20

Spread across a country or the world
Internet

Question 21

PAN definition + example

Answer 21

Very small area , Bluetooth

Question 22

What is a wired network +example

Answer 22

Physically wired, used in an office block

Question 23

Wireless network definition+ example

Answer 23

A network that uses radio waves to carry signals. Mostly used at home

Question 24

Two advantages of wired networks compared to wireless.

Answer 24

•Faster transmission speed
•wider range
•more secure

Question 25

Two advantages of a wireless network compared to wired

Answer 25

•Cheaper •Installation simpler

Question 26

What is a network topology

Answer 26

The arrangement of which all nodes of a network are connected together

Question 27

Give 2 advantages of star topology’s

Answer 27

•each node is seperate •new nodes can simply be added be connecting them to the switch •higher performance

Question 28

2 disadvantages of star togpology

Answer 28

•whole network fails if switch goes down •wired star topology’s are expensive

Question 29

2 advantages of a bus topology

Answer 29

•easy to connect new nodes •less cabling, making it cheaper

Question 30

2 disadvantages of bus networks

Answer 30

•whole network fails if one cable breaks •terminators must be installed at each end of the backbone •increased chances of data colliding

Question 31

What is a network protocal

Answer 31

A set of rules that governs the transmission of data

Question 32

On which layer do HTTP, HTTPS, SMTP, IMAP, FTP protocols operate on

Answer 32

Application

Question 33

On which layer do the TCP and UDP protocols operate on

Answer 33

transport

Question 34

What layer does the IP protocol operate

Answer 34

Internet

Question 35

What do the TCP/IP protocols do?

Answer 35

Enable communication across the Internet

Question 36

What do the HTTP and HTTPS protocols do?

Answer 36

Governs communication between a web server and a client. HTTPS is encrypted

Question 37

What does FTP do

Answer 37

Governs the transmission of files across a network and the internet

Question 38

What does UDP do

Answer 38

Messages are sent in packets. Often faster and used in gaming

Question 39

What does SMTP do?

Answer 39

Governs the sending of emails over a network to a mail server

Question 40

What does IMAP do?

Answer 40

Governs retrieving emails from email servers

Question 41

What is the application layer

Answer 41

Applications such as emails and web browsers

Question 42

Transport layer def

Answer 42

Breaks down the message into small packets to communicate

Question 43

What does the internet layer do📦

Answer 43

Adds the senders and recipients ip address

Question 44

Link layer definition

Answer 44

NIC and operating system drivers at this layer

Question 45

What is network layering

Answer 45

Where each component handles a different part of communication

Question 46

What is authentication and give an example

Answer 46

Process of confirming a users access, pin, passwords etc

Question 47

What is encryption and give an example

Answer 47

Where plaintext is changed into cipher text. Eg hi could be KL

Question 48

What is a firewall

Answer 48

Something that blocks unexpected connections coming in or out a network

Question 49

Are firewalls software, hardware or both

Answer 49

Both

Question 50

What is MAC address filtering

Answer 50

Each piece of hardware has a unique mac address

Question 51

What is a white list

Answer 51

Where only those MAC addresses are aloud

Question 52

What is a black list

Answer 52

A list where all mac addresses are banned