Question 1: Define a Local Area Network (LAN) and a Wide Area Network (WAN). Highlight the main differences between them.

Answer: A LAN is a network that connects computers within a small geographic area such as a building or campus. A WAN connects computers over a large geographic area, often using public networks like the internet. Main differences include size, speed, and ownership; LANs are smaller, faster, and privately owned, while WANs are larger, slower, and often publicly accessible.

Question 2: Explain two advantages of using a LAN in a school environment.

Answer: Advantages include fast data transfer speeds enabling quick sharing of resources like printers and files, and centralized management making it easier to update software and security across all devices.

Question 3: Describe a scenario where a WAN would be necessary instead of a LAN.

Answer: A WAN would be necessary when a company has offices in different cities or countries, needing to connect these locations to share data and resources over large distances.

Question 4: List three common technologies used to connect devices in a LAN.

Answer: Ethernet cables, Wi-Fi (wireless connection), and switches are common technologies used in LANs.

Question 5: You are designing a network for a small office. Draw a simple diagram showing a router connected to three computers and a printer. Label each device and connection clearly.

Answer: The diagram should include a central router with lines connecting to three computers and one printer. Each device should be labeled, and the connections should be clearly shown as wired or wireless links.

Question 6: Complete the following truth table for an AND gate with two inputs, A and B:

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

Question 7: Draw a logic circuit for an OR gate with two inputs, A and B. Label each input and the output.

Answer: The sketch should show the OR gate symbol with two lines entering labeled A and B, and one line leaving labeled Output.

Question 8: Describe how a WAN can connect different LANs across the world. Mention at least two technologies that enable this connection.

Answer: A WAN connects LANs over long distances using technologies such as satellite links, leased lines, or the internet infrastructure. These technologies enable data to travel across countries or continents, linking separate LANs into a wider network.

Question 9: Explain the role of a switch in a LAN network.

Answer: A switch connects multiple devices within a LAN and forwards data only to the device it is intended for, which improves network efficiency and reduces data collisions.

Question 10: Identify whether the following statement is true or false: 'A WAN is typically faster than a LAN.'

Answer: False. LANs are generally faster than WANs because they cover smaller areas and have higher data transfer speeds.

Question 11: Sketch a simple diagram showing how a wireless LAN (Wi-Fi) connects multiple devices in a cafe. Include the router, devices, and wireless signals.

Answer: The sketch should show a central router with waves emanating outward to connect to multiple devices, such as laptops and smartphones, without wires. Labels should clearly indicate wireless links.