2024 ASS Q4

Question 1

cribe the steps taken by the client and DHCP server in order to obtain an IP address. [8 marks]

Answer 1

DISCOVER. The client discovers the DHCP server allowing or waiting for a response.

OFFER. The servers responds offering a request.

REQUEST. The server gives the client the IP address.

ACKNOWLEDGEMENT. The client acknowledges the server.

Question 2

Explain the purpose of a port number in networking. [2 marks]

Answer 2

A port number is used to identify the application and TCP/IP services or protocols.

Question 3

State three (3) well-known port number together with their associated network service. [3 marks]

Answer 3

port 53 . network service = Domain name system

port 80. name service = HTTP(hypertext transfer protocol.)

port 443. HTTPS

Question 4

Describe the four layers of the TCP/IP Model. [8 Marks]

Answer 4

Application. used for exchange of signals and data e.g SMTP

Transport. carries and delivers data to its destination.

Internet. it addresses information

Network access. services are used for connetion to the network

Question 5

For each of the layers in the TCP/IP model provide example of a
protocol/service.

Answer 5

APPLICATION. HTTP / SIMPLE MAIL TRANSFER PROTOCOL.

TRANSPORT. TCP(TRANSMISSION CONTROL PROTOCOL) /UDP (USER DATA PROTOCOL.

INTERNET. INTERNET PROTOCOL(ip)

NETWORK ACCESS. LAN , WAN