1.3.3 Networks

Question 1

What is a protocol?

Answer 1

A set of rules that govern the transmission of data over a network

Question 2

TCP/IP Stack

Answer 2

Application layer
Transport Layer
Internet Layer
Network or data Link Layer

Question 3

What is the application layer?

Answer 3

It governs how data moves in and out of applications

Question 4

What is the Transport Layer?

Answer 4

This is concerned with the establishment and termination of connections between networks entities via routers

-It is responsible for providing a reliable flow of data across the network

Question 5

What is the internet Layer?

Answer 5

Concerned with providing the links across different network types

Question 6

What is the Network Layer?

Answer 6

Passes data to the physical network E.G. copper wire or wireless radio waves

Question 7

What is a Domain Name System?

Answer 7

It matches domain names to the IP addresses using domain name servers

Question 8

Example of Domain name system

Answer 8

EG:the domain name www.example.com is translated too

93. 184.216.119
    - The URL is easier to remember

Question 9

What is a LAN(Local Area Network)?

Answer 9

• The network exists in a small geograhic area

- A room, building or a campus

Question 10

What is a WAN(Wide Area Network)?

Answer 10

-They cover a large geographical area

Question 11

What is Circuit Switching?

Answer 11

-The establishment of a physical connection between two communicating entities

• It provides an exclusive dedicated channel
• This channel remains open for the duration of the communication session

Question 12

What is Packet Switching?

Answer 12

• Divides a message into data units called packets
• Packets are sent across a network by whichever routes are available or most efficient
• Used for modern computer networks