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

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

Question 2: Name two common network protocols used on the internet and briefly describe their purpose.

Answer: HTTP (Hypertext Transfer Protocol) is used for transmitting web pages, and FTP (File Transfer Protocol) is used for transferring files between computers.

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

Answer: TCP (Transmission Control Protocol) ensures reliable data delivery with error checking and correction, while UDP (User Datagram Protocol) sends data without guaranteeing delivery, making it faster but less reliable.

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

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

Question 5: Draw a logic circuit that uses AND, OR, and NOT gates to represent a circuit where the output is true if either Input A is true and Input B is false, or Input C is true.

Answer: A correct sketch would include an AND gate taking Input A and the NOT of Input B, an OR gate combining this output with Input C, with the final output coming from the OR gate.

Question 6: Describe how the HTTP protocol is used when accessing a webpage.

Answer: When a user types a URL into a browser, the browser sends an HTTP request to the web server asking for the webpage. The server responds with the webpage data, which the browser then displays.

Question 7: Identify two advantages of using Wi-Fi over a wired Ethernet connection.

Answer: Wi-Fi provides wireless convenience, allowing devices to connect without cables, and it enables mobility, so users can move freely within the signal range.

Question 8: Sketch a simple diagram showing a client connecting to a server over a network using the TCP/IP protocol suite. Label the client, server, and network connection.

Answer: A correct sketch would depict two boxes labeled 'Client' and 'Server' connected by a line representing the network, with labels indicating 'TCP/IP protocol suite' on the connection.

Question 9: Explain the purpose of headers in data packets sent over a network.

Answer: Headers contain control information such as source and destination addresses, error-checking data, and protocol details, which help manage and route data correctly.

Question 10: Describe one security concern associated with wireless networks and how it can be mitigated.

Answer: A common concern is unauthorized access, which can be mitigated by using strong encryption (like WPA2) and setting a secure password for the Wi-Fi network.

Question 11: Identify and describe the function of a protocol that manages email transmission.

Answer: SMTP (Simple Mail Transfer Protocol) manages the sending of emails from client to email servers and between servers, ensuring emails are delivered correctly.