Types of Network

1. LAN (Local Area Network):

It is privately-owned networks within a single building or campus of up to a few kilometres in size.

They are widely used to connect personal computers and workstations in company offices and factories to share resources (e.g., printers) and exchange information.

LANs are easy to design and troubleshoot.

In LAN, all the machines are connected to a single cable.

Different types of topologies such as Bus, Ring, Star and Tree are used.

The data transfer rates for LAN is up to 10 Gbits/s.

They transfer data at high speeds. High transmission rate are possible in LAN because of the short distance between various computer networks.

They exist in a limited geographical area.

Advantages ::

LAN transfers data at high speed.

LAN technology is generally less expensive.

2. MAN (Metropolitan Area Network):

MAN is a larger version of LAN which covers an area that is larger than the covered by LAN but smaller than the area covered by WAN.

A metropolitan area network or MAN covers a city. The best-known example of a MAN is the cable television network available in many cities.

MAN connects two or more LANs.

At first, the companies began jumping into the business, getting contracts from city governments to wire up an entire city.

The next step was television programming and even entire channels designed for cable only.

3. WAN (Wide Area Network):

WAN spans a large geographical area, often a country or region.

WAN links different metropolitan’s countries and national boundaries there by enabling easy communication.

It may be located entirely with in a state or a country or it may be interconnected around the world.

It contains a collection of machines intended for running user (i.e., application) programs. We will follow traditional usage and call these machines hosts.

The communication between different users of WAN is established using leased telephone lines or satellite links and similar channels.

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