ITF Infrastructure 1 — Questions and Answers
Question 1: Which of the following devices is responsible for connecting multiple computers within a local area network (LAN)?
- Router
- Switch (Correct answer)
- Modem
- Printer
Correct answer: Switch
A network switch is a device that connects multiple computers and other network devices within a local area network (LAN). It learns the MAC addresses of connected devices and forwards data packets only to the specific destination port, rather than broadcasting them to all ports. This makes network communication more efficient and secure compared to older hubs.
Question 2: What does the term "cloud computing" refer to?
- Storing data on physical hard drives
- The process of moving software development to the internet
- Using the internet to access and store data on remote servers (Correct answer)
- The software installed directly on a user's computer
Correct answer: Using the internet to access and store data on remote servers
Cloud computing refers to the delivery of on-demand computing services—including servers, storage, databases, and software—over the Internet. Instead of owning and maintaining physical hardware, users can access and store their data on remote servers managed by a cloud provider. This offers flexibility, scalability, and cost-efficiency by paying only for the resources used.
Question 3: What is the primary purpose of a modem in a home network?
- To connect devices wirelessly
- To route data between networks
- To convert digital signals to analog and vice versa for internet access (Correct answer)
- To increase network speed
Correct answer: To convert digital signals to analog and vice versa for internet access
A modem (modulator-demodulator) is essential for connecting a home network to an Internet Service Provider (ISP). It converts the digital signals from your computer or router into analog signals that can be transmitted over telephone lines, cable lines, or fiber optics, and vice versa. This modulation and demodulation process enables your home network to communicate with the internet.
Question 4: Which of the following is a key function of an operating system?
- To store files permanently
- To provide a user interface for interaction with the computer (Correct answer)
- To execute programs automatically without user input
- To control the internet connection speed
Correct answer: To provide a user interface for interaction with the computer
An operating system (OS) is the fundamental software that manages computer hardware and software resources. One of its key functions is to provide a user interface (UI), whether graphical or command-line, allowing users to interact with the computer, launch applications, manage files, and configure settings. Without an OS, a computer would be unable to perform any useful tasks or respond to user input.
Question 5: What is the primary purpose of a network router?
- To connect devices within a local area network (LAN)
- To manage the flow of data between different networks, including the internet (Correct answer)
- To store backup copies of data
- To provide wireless internet access
Correct answer: To manage the flow of data between different networks, including the internet
A network router acts as a traffic controller, connecting multiple networks (like your home LAN and the internet) and directing data packets between them. It uses IP addresses to determine the best path for data to travel, ensuring that information reaches its correct destination across interconnected networks. This is distinct from a switch, which connects devices *within* a single LAN.
ITF Infrastructure 1
Which of the following devices is responsible for connecting multiple computers within a local area network (LAN)?