IBCS: Networks

What is a computer network?

• A collection of computing devices that are connected to communicate and share resources.

• A single computer used for processing data.

• A device used only for printing documents.

• A software programme for editing images.

Answer explanation

A computer network is defined as a collection of computing devices that are connected to communicate and share resources, making this the correct choice. The other options describe unrelated concepts.

Which of the following is NOT a method by which computers in a network can be connected?

• Using physical wires

• Using radio waves

• Using infrared signals

• Using only printers

Answer explanation

The correct choice is 'Using only printers' because printers are output devices and do not facilitate network connections. In contrast, physical wires, radio waves, and infrared signals are valid methods for connecting computers in a network.

What is the main purpose of a Local Area Network (LAN)?

• To connect network devices over a relatively short distance

• To connect computers across the world

• To store large amounts of data

• To provide wireless internet to mobile phones only

Answer explanation

The main purpose of a Local Area Network (LAN) is to connect network devices over a relatively short distance, allowing for efficient communication and resource sharing among connected devices.

The type of network that allows computers to behave as if they are connected to the same topology, even if they are physically located in different segments is called (a)  

• LAN

• WAN

• MAN

• VPN

Answer explanation

A Virtual Local Area Network (VLAN) allows devices on different physical networks to communicate as if they are on the same local network, effectively creating a unified network topology despite physical separation.

What is a key feature of a Storage Area Network (SAN)?

• It is designed to handle large data transfers and supports data storage, retrieval, and replication.

• It connects devices over a short distance only.

• It is used only for sending emails.

• It is a type of wireless network for mobile devices.

Answer explanation

A key feature of a Storage Area Network (SAN) is its ability to handle large data transfers, making it suitable for data storage, retrieval, and replication, unlike the other options which are incorrect.

Why is bandwidth important in computer networks?

• It determines the speed at which data is moved from one place to another.

• It increases the number of computers in a network.

• It reduces the need for network security.

• It only affects wireless networks.

Answer explanation

Bandwidth is crucial because it determines the speed at which data is transferred across a network. Higher bandwidth allows for faster data movement, enhancing overall network performance.

Which of the following best describes a Wide Area Network (WAN)?

• A geographically-dispersed collection of two or more LANs.

• A network limited to a single building.

• A network used only for printers.

• A network that does not use any physical connections.

Answer explanation

A Wide Area Network (WAN) connects multiple Local Area Networks (LANs) over large distances, making the first option the best description. The other choices describe networks with limited scope or functionality.

How does a VLAN provide flexibility in network management?

• By allowing computers to be removed from the VLAN and located elsewhere without physically rewiring the system.

• By increasing the physical size of the network.

• By only using wireless connections.

• By limiting the number of devices that can connect.

Answer explanation

A VLAN allows devices to be logically grouped regardless of their physical location, enabling easy reconfiguration without rewiring. This flexibility simplifies network management and enhances scalability.

Which of the following is an example of a tangible resource shared over a network?

• A printer

• An email

• A web page

• A software update

Answer explanation

A printer is a tangible resource that can be physically touched and is shared over a network, allowing multiple users to print documents. In contrast, email, web pages, and software updates are intangible digital resources.

What is the role of a gateway in a WAN?

• To serve as a point for handling all communication going through a LAN and other networks.

• To store all the data in the network.

• To print documents for the network.

• To provide wireless access to the internet.

Answer explanation

A gateway in a WAN serves as a crucial point for managing communication between a Local Area Network (LAN) and other networks, facilitating data transfer and connectivity.