Networking - Computer Science

Question 1

What does LAN stand for?

Answer 1

Local Area Network

Question 2

What does WAN stand for?

Answer 2

Wide Area Network

Question 3

Name three factors that affect the performance of networks.

Answer 3

• Bandwidth
• Latency
• Number of devices connected

Question 4

Give two examples of network frameworks

Answer 4

• Client-server
• Peer-to-peer

Question 5

List four hardware components needed to connect stand-alone computers into a Local Area Network.

Answer 5

• Wireless access points
• Routers
• Switches
• NIC (Network Interface Controller/Card)

Question 6

What does DNS stand for?

Answer 6

Domain Name System

Question 7

What is the purpose of hosting in the context of the Internet?

Answer 7

To store and serve websites and applications

Question 8

What is the Cloud?

Answer 8

A worldwide collection of computer networks providing storage and services over the Internet

Question 9

Give two examples of network topologies

Answer 9

• Star
• Mesh

Question 10

What is a wired mode of connection?

Answer 10

Ethernet

Question 11

What are three wireless modes of connection?

Answer 11

• Wi-Fi
• Bluetooth
• Sattelite

Question 12

What is encryption?

Answer 12

A method of securing data by converting it into a coded format

Question 13

What does IP stand for in networking?

Answer 13

Internet Protocol

Question 14

What does MAC stand for in networking?

Answer 14

Media Access Control

Question 15

Name three common protocols.

Answer 15

• TCP/IP
• HTTP
• FTP
• HTTPS
• POP
• IMAP
• SMTP

Question 16

What does TCP stand for?

Answer 16

Transmission Control Protocol

Question 17

What does HTTP stand for?

Answer 17

Hyper Text Transfer Protocol

Question 18

What does HTTPS stand for?

Answer 18

Hyper Text Transfer Protocol Secure

Question 19

What does FTP stand for?

Answer 19

File Transfer Protocol

Question 20

What does POP stand for?

Answer 20

Post Office Protocol

Question 21

What does IMAP stand for?

Answer 21

Internet Message Access Protocol

Question 22

What does SMTP stand for?

Answer 22

Simple Mail Transfer Protocol

Question 23

Define the TCP/ IP protocol stack.

Answer 23

• Consists of four layers that enable internet communication.
• This is a modular design with each layer being responsible for a small part of the communication process.
• Each layer is a self-contained area of network functionality

Question 24

What is malware?

Answer 24

Malicious software designed to harm or exploit any programmable device

Question 25

What is social engineering in the context of cybersecurity?

Answer 25

Manipulating individuals to divulge confidential information

Question 26

What is phishing?

Answer 26

A form of social engineering aimed at acquiring sensitive information

Question 27

What is a brute-force attack?

Answer 27

An attempt to crack a password or encryption key by trying all possible combinations

Question 28

What is a denial of service attack?

Answer 28

An attack intended to make a machine or network resource unavailable to its intended users

Question 29

What does SQL injection refer to?

Answer 29

A code injection technique that exploits security vulnerabilities in an application's software

Question 30

Name three common prevention methods in cybersecurity.

Answer 30

* Penetration testing * Anti-malware software * Firewalls

Question 31

What is penetration testing?

Answer 31

A simulated cyber attack against a computer system to check for vulnerabilities

Question 32

What role do user access levels play in network security?

Answer 32

They restrict access to resources based on user permissions

Question 33

What is the purpose of using passwords in cybersecurity?

Answer 33

To authenticate users and protect access to systems and data

Question 34

What is physical security in the context of cybersecurity?

Answer 34

Measures taken to protect physical assets from unauthorized access or damage

Question 35

What is the purpose of the application layer in the TCP/ IP protocol stack and what protocols/ hardware operate here?

Answer 35

* Applications such as email clients and web browsers create data to send in this layer * SMTP , FTP and HTTP operate in this layer

Question 36

What is the purpose of the transport layer in the TCP/ IP protocol stack and what protocols/ hardware operate here?

Answer 36

* The transport layer creates the connection between two computers, or ‘hosts’ * Data is then divided up into packets and given a packet number * Packets are reassembled by the recipient’s Transport layer * Lost packets are resent *TCP operates here

Question 37

What is the purpose of the internet layer in the TCP/ IP protocol stack and what protocols/ hardware operate here?

Answer 37

* The Internet layer is responsible for routing packets * Source and destination addresses are written on to the packets ready for transmission * IP operates here

Question 38

What is the purpose of the link layer in the TCP/ IP protocol stack and what protocols/ hardware operate here?

Answer 38

* Enables the transfer of packets between nodes on a network. * Enables the transfer of packets between different networks. * Ethernet & Wi-Fi operate on this layer.