INTRODUCTION OF LAN, MAN AND WAN

ASHIMA KALRA

COMPUTER NETWORK Local Area Network (LAN) Metropolitan Area Network(MAN) Wide Area Network (WAN)

INDEX…

Computer Network

Computer network, often simply referred to as a network, is a collection of hardware components and computers interconnected by communication channels that allow sharing of resources and information.

System of computers, print devices, and computer software linked by communications cabling or radio waves

Network Communication

BACK

Network Types Defined

Local area networks Metropolitan area networks Wide area networks

BACK

Local Area Network (LAN)

Local area network (LAN) is a network that connects computers and devices in a limited geographical area such as home, school, computer laboratory, office building, or closely positioned group of buildings.

Series of interconnected computers, printing devices, and other computer equipment that share hardware and software resources

BACK

Example of a LAN

BACK

Features

Limited geographic limits Limited number of users Reliability and stability Flexibility Expendable Security and administration

BACK

Advantages

In expensive transmission media In expensive devices to interface the media Easy physical connection of devices to the media High data transmission rates High degree of inter-connection between devices

BACK

Disadvantages

Local area networking software requires memory space in each of the computers used on the network

Adds another level of complexity to the computer operation Security system must be implemented Financial cost of networking is high in comparison with

many other alternatives

BACK

Metropolitan Area Network(MAN)

Metropolitan area network (MAN) is a large computer network that usually spans a city or a large campus.

Links multiple LANs in a large city or metropolitan region

BACK

Example of a MAN

BACK

Wide Area Network (WAN)

Wide area network (WAN) is a computer network that covers a large geographic area such as a city, country using a communications channel that combines many types of media such as telephone lines, cables, and air waves. A WAN often uses transmission facilities provided by common carriers, such as telephone companies.

Far-reaching system of networks that usually extends over 30 miles and often reaches across states and countries

BACK

BACK

Example of a WAN

Features

Data Transmission speed is low. Data Transmission cost is very high. Data transmission error can occur. More complexity. Less reliable. The communication medium used can be satellites links

due to longer distances involved.

BACK

Thanks