Introduction to Computer Networks

What is a network?

• A group of two or more computers linked together

• A single computer working alone

• A printer connected to a computer

• A mobile phone without internet

Answer explanation

A network is defined as a group of two or more computers linked together, allowing them to communicate and share resources. The other options describe isolated devices or connections that do not constitute a network.

What is one of the topics covered in this lesson?

• The benefits of networking computers

• The disadvantages of using electricity

• The process of manufacturing computers

• The history of television

Answer explanation

The lesson covers the benefits of networking computers, which is essential for understanding how interconnected systems enhance communication and resource sharing, making it the correct choice.

Which of the following is an example of a network?

• Two computers connected by a cable

• A single computer with no connections

• A printer without a computer

• A mouse connected to a keyboard

Answer explanation

A network consists of multiple devices connected to share resources. Two computers connected by a cable exemplify this, as they can communicate and share data, unlike the other options which do not involve connections between devices.

Why might networks be classified by their size?

• To determine the type of cables needed

• To identify if computers are in a single building or across a country

• To decide the color scheme of the network

• To select the brand of computers used

Answer explanation

Networks are classified by size to determine their scope, such as whether computers are within a single building (local area network) or spread across a country (wide area network), which affects design and management.

What is the main purpose of a LAN?

• To share resources within a building

• To connect to the internet

• To send emails worldwide

• To host public websites

Answer explanation

The main purpose of a LAN (Local Area Network) is to share resources, such as files and printers, within a building. This allows devices to communicate and collaborate efficiently in a localized environment.

Which device can be connected to a smartphone in a PAN to share a mobile broadband connection?

• Computer

• Television

• Refrigerator

• Microwave

Answer explanation

A computer can connect to a smartphone via a Personal Area Network (PAN) to share a mobile broadband connection, allowing internet access. Other devices like televisions, refrigerators, and microwaves typically do not support this functionality.

Which statement best explains the main advantage of a PAN for keeping information up-to-date?

• It allows information to be synced across multiple personal devices.

• It increases the storage capacity of devices.

• It provides free internet access.

• It blocks spam emails.

Answer explanation

The main advantage of a Personal Area Network (PAN) is that it allows information to be synced across multiple personal devices, ensuring that data is consistently updated and accessible wherever needed.

Which of these is NOT listed as a use of networks in the material?

• Entertainment

• Communication

• Sharing

• Transportation

Answer explanation

Transportation is not listed as a use of networks. The other options—Entertainment, Communication, and Sharing—are commonly recognized uses of networks.

What does the diagram most likely represent?

• Two people playing sports

• Two people communicating over a network

• Two people reading books

• Two people cooking together

Answer explanation

The diagram likely shows two people communicating over a network, as indicated by their interaction and the context of connectivity, which aligns with the correct answer choice.

Which of the following best describes a policy document in the context of sharing on a network?

• A document that needs to be shared with all staff

• A document for personal use only

• A document for entertainment

• A document for printing photos

Answer explanation

A policy document is intended to guide and inform all staff members about important protocols or rules, making 'A document that needs to be shared with all staff' the best description in a network sharing context.