Introduction to Networks

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Questions and Answers

What is a network?

A network is a collection of computers that are connected through a communication channel to share data, hardware, and software.

List one reason why networks are needed.

To share peripherals devices.

A wide area network (WAN) covers a small physical area, usually less than 1 km.

False

A central computer in a Clients-server LAN is known as a ______.

server Signup and view all the answers

Which of the following is NOT a type of LAN?

Wide Area Network Signup and view all the answers

What is defined as a local area network (LAN)?

A network providing inter-communication of data devices within a small area. Signup and view all the answers

What does NIU stand for?

Network Interface Unit Signup and view all the answers

What connects all the NIUs in a LAN?

Hub Signup and view all the answers

Which of the following are reasons for having networks? (Select all that apply)

For better communication Signup and view all the answers

What is a network?

A network is a collection of computers that are connected through a communication channel to share data, hardware, and software. Signup and view all the answers

A Local Area Network (LAN) is limited to a physical area of roughly 1 km radius.

True Signup and view all the answers

What is the purpose of the Network Interface Unit (NIU)?

The NIU delivers messages safely between computers on a network. Signup and view all the answers

What is the definition of a Wide Area Network (WAN)?

A WAN is a communication network that covers large geographic areas, roughly 100 sq.km. Signup and view all the answers

Which of the following options are types of LAN? (Select all that apply)

Clients-server LAN Signup and view all the answers

What does a Clients-server LAN imply?

Clients share the services of a centralized server. Signup and view all the answers

A Peer to Peer LAN relies on a central server to share resources.

False Signup and view all the answers

Study Notes

Introduction to Networks

A network is a group of computers connected by a communication channel to share data, hardware, and software.
Examples of communication channels include cables, fiber optics, and wireless connections.
Sharing resources, exchanging files, and facilitating electronic communication are key benefits of networks.
The Information Technology Act of 2000 in India defines a computer network as an interconnection of computers, computer systems, or communication devices through various media like satellites, microwaves, cables, and wireless connections.

Reasons for Networks

Sharing peripheral devices like printers and scanners.
Sharing programs and data among users.
Enhancing communication among individuals.
Improving information security.
Accessing shared databases.

Types of Networks

Basic Type Networks:
- Local Area Network (LAN): A network connecting computers and devices within a small area like an office, classroom, or building.
- Wide Area Network (WAN): A network covering a large geographic area, extending beyond a single building or campus.
Interconnected Networks:
- Intranet: A private network within an organization.
- Extranet: A network connecting an organization's internal network with its external partners like suppliers and customers.
- Internet: A global network connecting millions of computers and devices worldwide.

Local Area Network (LAN)

A LAN connects computers and devices within a limited physical area, typically with a radius of about 1 kilometer.
It facilitates communication within a single office, building, or site.
Common media used in LANs include twisted pair wire, coaxial cable, and wireless radio.
Each computer in a LAN has a Network Interface Unit (NIU) that handles data transmission.
A central server within a LAN manages network operations, resources, and access.
Modern computers are designed to easily connect to a LAN without needing additional equipment.
Types of LANs:
- Client-Server LAN: Clients (individual computers) access services provided by a central server.
- Peer-to-Peer LAN: Computers share resources and data directly with each other without relying on a central server.

Wide Area Network (WAN)

A WAN extends over large geographic regions, connecting computers over long distances, such as cities or countries.
It connects offices, departments, or locations spread across a wide area for organizations with geographically dispersed operations.
WANs utilize diverse communication technologies, including telephone lines, microwave links, satellites, and fiber-optic cables.

Network Basics

A network is a collection of interconnected computers, telephones, or other communication devices that share data and applications.
A network is created when two or more computers are linked together, allowing them to share resources, exchange files, and communicate electronically.
Networks can be interconnected using cables, telephone lines, radio waves, satellites, or infrared light beams.

The Benefits of Networks

Networks allow for the sharing of peripheral devices, such as printers and scanners.
Networks make it possible to share programs and data across multiple computers.
Networks enhance communication by connecting individuals and organizations.
Networks provide security for information by facilitating data storage backups and access control.
Networks provide access to databases, enabling information sharing and collaboration.

Local Area Networks (LANs)

Local area networks (LANs) connect computers and other devices within a small geographical area, such as an office, classroom, or building.
LANs can be used by organizations to provide telecommunications network capabilities to their users.
LANs use a range of communication media, including twisted pair wire, coaxial cable, and wireless radio.
Each computer connected to a LAN has a network interface unit (NIU) which acts as a communication point.
Most LANs use a network server, a powerful computer that controls network operations, telecommunications, and resource sharing.
Current computer designs make it easy to connect to a network without additional hardware.

Types of LANs

Client-server LAN: Users share resources provided by a central computer called a server.
Peer-to-peer LAN: Computers share resources directly with each other without relying on a central server.

Wide Area Networks (WANs)

Wide area networks (WANs) cover large geographical areas, connecting computers across cities and even continents.
WANs are commonly used by organizations with multiple offices or locations.

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Description

This quiz explores the fundamental concepts of networks, including their definitions, benefits, and types. Learn about local area networks (LANs), communication channels, and the importance of resource sharing and security. Test your understanding of how networks enhance communication and information sharing.