What is Network?
In general, the term network can refer to any interconnected group or system. More specifically, a network is any method of sharing information between two systems. A network lets you effortlessly transfers files, pictures, music and information – without using a disk or burning a CD.
Classification of Networks on the basis of Size of Network
1. LAN (LOCAL AREA NETWORK): –
A local area network is group of computers and network communication devices within limited geographic area, such as office building. Current LAN’s are most likely to be based on Ethernet technology. For Ex. Library will have a wired or wireless LAN for Users to interconnect local devices.
2. MAN (METROPOLITAN AREA NETWORK): –
A Metropolitan Area Network is a network that connects two or more Local Area Networks or Campus Area Network together but does not exceed beyond the boundaries of immediate town, city or metropolitan area. Multiple routers, switches, hubs are connected to create a MAN.
3. WAN (WIDE AREA NETWORK): –
A WAN is a data communications network that covers a relatively broad geographic area and that often uses transmission facilities provided by common carriers, such as telephone companies. They are generally connected with each other using routers.
characteristics of WAN :-
- Multiple interconnected LANs.
- Generally sophisticated to implement than LANs.
- More Sophisticated to implement more than LANs.
- Exist in as unlimited geographic area.
- Less error resistance due to transmission travel distances.
4. PAN (PERSONAL AREA NETWORK): –
A personal area network is a computer network used for communication among computer devices close to one person. Some example of devices may be used in a PAN are printers, fax machines, telephone etc. The reach of PAN is typically withing 20-30 feets.
EXAMPLE OF NETWORKS LOOKS BEHIND