Question 1: Define the term 'protocol' in the context of computer networks.

Answer: A protocol is a set of rules that govern how data is transmitted and received across a computer network.

Question 2: List three common network protocols and briefly describe their functions.

Answer: 1. HTTP: Used for transferring web pages. 2. FTP: Used for transferring files between computers. 3. TCP/IP: Provides reliable communication and routing across networks.

Question 3: Explain the main difference between TCP and UDP protocols.

Answer: TCP is connection-oriented, ensuring data is received correctly and in order, while UDP is connectionless, transmitting data without guarantee of delivery, making it faster but less reliable.

Question 4: Complete the following truth table for the AND logic gate:

Answer: A | B | Output ---|---|-------- 0 | 0 | 0 0 | 1 | 0 1 | 0 | 0 1 | 1 | 1

Question 5: Describe a scenario where a Wi-Fi network would be preferred over a wired Ethernet network.

Answer: A Wi-Fi network is preferred in situations where mobility is needed, such as in a classroom or a conference room, allowing devices to connect without physical cables.

Question 6: Draw a simple diagram of a client-server model for a network. Use labels to identify the client and server components.

Answer: A correct sketch should show a central server connected via lines to multiple clients. Labels should identify the server and clients clearly.

Question 7: What is the purpose of the IP address in a network?

Answer: An IP address uniquely identifies each device on a network, enabling data to be sent to the correct destination.

Question 8: Sketch a basic flowchart illustrating the process of a web browser retrieving a web page from a server. Include at least three steps.

Answer: The flowchart should include steps such as: 1. Browser sends HTTP request, 2. Server processes request and sends back data, 3. Browser renders the web page.

Question 9: Identify two advantages and two disadvantages of using wireless networks.

Answer: Advantages: 1. Mobility and convenience, 2. Easy to set up. Disadvantages: 1. Less secure than wired networks, 2. Can be affected by interference and signal range issues.

Question 10: Explain what a 'firewall' does in network security.

Answer: A firewall monitors and filters incoming and outgoing network traffic to prevent unauthorized access and protect the network from threats.

Question 11: Draw a simple diagram of an Ethernet cable connecting a computer to a switch. Label the components.

Answer: A correct sketch should show a computer connected by a line (cable) to a rectangular box labeled 'Switch'. Labels should clearly identify each component.