Computer Networks - Test Interview Viva Voce

Q1. Define Network with example. Give importance of computer network.

COMPUTER NETWORK
A computer network is a set of two or more computers connected together to share information and other resources. The computers in a network can share:

Data, information and Files
Resources (printers, Cd-Rom Drives, DVD- Rom Drives, CD- Writers, hard disk, modems)
Programs / software

EXAMPLES OF COMPUTER NETWORK

Computer network can be used in an organization's office. Different employees and managers in the office and organization can share common information.
Internet, is also an example of a computer network. Internet is a network of millions of computers connected through phone lines. People can share information, files and talk with one another through internet.
Internet cafe also uses computer network for internet sharing on all computers.
A Computer laboratory in a school or college may use local area network for sharing data and other reources like printers, Cd-Rom drives or hard disks etc.

ADVANTAGES OF COMPUTER NETWORKS

Following are some important advantages of computer networks:

Information Sharing
Data and information can be shared by many users.

Hardware Sharing
Hardware Resources like printer, scanner, CD-ROM drive and hard disk can also be shared.
Money Saving
We can save a lot of money by using the same software and hardware in a network.
Easy and Fast Communication
We can send and receive emails and share files with other people in the company or in any part of the world through network or internet.

Q2. Explain different types of computer networks: (LAN,WAN,MAN).

Main types of computer networks are: 1. LAN - Local-Area Network 2. WAN - Wide-Area Network 3. MAN - Metropolitan-Area Network

LAN (Local Area Network)

LAN stands for Local Area Network. It covers a small area. Most LANs are used to connect computers in a single building or group of buildings. Examples: Following are two examples of LAN: • LAN is used in a computer lab to connect computers. The students can share software, files and data in the lab. • In Internet cafe, many computers can be connected through LAN. These computers can share single connection of Internet.

2)WAN (Wide Area Network)

WAN stands for wide area network. It covers a large area. WAN connects computers in different cities, countries and continents. Computers in WAN are often connected through telephone lines. The largest WAN is the Internet. Examples of WAN • In air ticketing system like PIA, many offices can be joined together using WAN. A person can get a ticket from any office in the country. • A bank with many branches in different cities can connect its branches through WAN. The customer can use his account from any branch.

3)MAN (Metropolitan-Area Network)

A metropolitan area network (MAN) is a network that covers an area of the size of a city. Example: Mobile phones systems often use MAN.

Q3. Differentiate between LAN and WAN.

The differences between LAN and WAN is as follows:

*LAN*		*WAN*
1.	LAN is used to connect computers at one place.		WAN is used to connect computers anywhere in the world.
2.	LAN covers limited area.		WAN can cover more area.
3.	Data transfer speed is very fast in LAN.		Data transfer speed is slow in WAN.

Explain Main Difference Between System Software and Application Software

Topic: Explain Main Difference Between System Software and Application Software Differentiate between system software and application software Before , explaining the main differences between application software and system software, let us know the definitions of Application software and System software with examples. What is System Software: System software is a set of programs to control all components of computer and to manage overall operations of computer system. Differences between System software and application software System software is used as a base to install and run all application software. Examples of system software include: Operating Systems, like Microsoft Windows, DOS, Unix and Linux Device Drivers like Device driver software of a Printer (found on CD normally provided with the printer) Utility Programs like AVAST anti virus, Disk Scanners and File Viewers etc. What is Application Software? Users can use Appli

Define Data and Information With Examples

DATA Data is the collection of raw facts and figures. Actually data is unprocessed, that is why data is called collection of raw facts and figures. Define Data and Information with Examples We collect data from different resources. After collection, data is entered into computer for processing. Data may be collection of words, numbers, pictures, or sounds etc. Examples of Data 1) Student Data on Admission Forms When students get admission in a college. They fill admission form. This form contains raw facts (data of student) like name, father’s name, address of student, obtained marks, photo graph etc. 2) Data of Citizens During census, data of all citizens is collected. The staff will go house to house and collect data about citizens like number of persons living in a home, either they are literate or illiterate, number of children, data of each child, cast, religion, Computerized national Identity Card number, address, how many rooms and other facilities in the

Advantages and Disadvantages of Ring Network Topology

Topic: Advantages and Disadvantages of Ring Network Topology alongwith detailed working of Ring topology What Do You Mean by Ring Topology? In Ring topology, each computer is connected to the next computer such that last computer is connected to the first. Every computer is connected to next computer in the ring. Each computer retransmits what it receives from the previous computer. Suppose, computer A needs to send data to computer D. Now the computer A sends data to computer B. As computer B is not the destination computer, so it will retransmit data to computer C. Finally, Computer C will transfer data to computer D, the destination computer. When a node sends a message, the message is processed by each computer in the ring. If a computer is not the destination node, it will pass the message to the next node, until the message arrives at its destination. Advantages of Ring Network Topology 1. It is relatively less expensive than a star topology network. 2. In a Rin

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