Understanding Computer Networks

What is a network?

• A network is a single computer that operates independently.

• A network is a system of interconnected computers or devices that can exchange data.

• A network is a type of software application.

• A network is a collection of unrelated devices.

Answer explanation

A network is defined as a system of interconnected computers or devices that can exchange data, making this choice the correct answer. The other options describe unrelated concepts.

Which of the following is a type of network topology? (a) Star (b) Circle (c) Square

• Hexagon

• Star

• Rectangle

• Triangle

Answer explanation

The correct answer is 'Star' as it is a recognized type of network topology. In contrast, 'Circle', 'Square', 'Hexagon', 'Rectangle', and 'Triangle' are not standard topologies in networking.

Fill in the blank: A __________ is a device that connects multiple computers in a network.

• switch

• hub

• modem

• router

Answer explanation

A hub is a basic networking device that connects multiple computers in a network, allowing them to communicate. Unlike switches and routers, a hub broadcasts data to all connected devices, making it a simple connection point.

What does LAN stand for?

• Large Area Network

• Local Area Network

• Local Access Node

• Longitudinal Area Network

Answer explanation

LAN stands for Local Area Network, which refers to a network that connects computers within a limited area, such as a home, school, or office. The other options do not accurately describe this type of network.

True or False: A WAN covers a small geographical area.

• False

• A WAN covers a city area

• True

• A WAN is a local network

Answer explanation

False is correct because a WAN (Wide Area Network) covers a large geographical area, often spanning cities, countries, or even continents, unlike a local network which covers a small area.

What is the main purpose of a router?

• The main purpose of a router is to connect multiple networks and route data between them.

• To amplify Wi-Fi signals in a home network.

• To store data for backup purposes.

• To provide antivirus protection for devices.

Answer explanation

The main purpose of a router is to connect multiple networks and route data between them, making it essential for communication between devices on different networks.

Fill in the blank: The __________ layer of the OSI model is responsible for data transmission.

• Data Link

• Network

• Transport

• Application

Answer explanation

The Data Link layer of the OSI model is responsible for data transmission between directly connected nodes. It ensures reliable transfer of data frames, making it the correct choice for this question.

Which protocol is used for sending emails?

• POP3

• SMTP

• HTTP

• IMAP

Answer explanation

The Simple Mail Transfer Protocol (SMTP) is the standard protocol used for sending emails. In contrast, POP3 and IMAP are used for retrieving emails, while HTTP is used for web communication.

What does IP stand for?

• Interconnected Path

• Internal Protocol

• Internet Protocol

• Internet Provider

Answer explanation

IP stands for Internet Protocol, which is a fundamental protocol used for communication over the internet. It defines how data is sent and received, making it the correct choice among the options provided.

Name one advantage of using a wireless network.

• Increased interference from other devices.

• Higher installation costs.

• Limited range and coverage.

• Increased mobility and flexibility.

Answer explanation

One advantage of using a wireless network is increased mobility and flexibility, allowing users to connect from various locations without being tethered to a physical connection.