Networks

NETWORK’s

There are three types of networks.

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’s a collection of computers, usually personal computers , that share hardware, software and data. In simple tems LAN’s holds the personal computers through the media and so each personal computer can shate the resourse of the other. As the name implies, LAN’s cover short distances, such as with in campus, builiding, or office.

LAN’s Components :

            Lan’s don’t use telephone lines for sharing the resources, it’s used the speacial components:

  v  To share the computer systems we need some resources . that’s why in LAN’s networks the Network cables are used to connect all computers. Somtimes coaxle cable may be used. The difference between network cable and coaxle cable is the speed. Coaxle cable have more speed than network cable. Moreover computers can be connected with wireless connection but it’s slower than the both (network cable & coaxle cable).

  v  A network card oftern called as NIC card.  It’s the card used in the wiring to connect the computers. In desktop computers it fit’s in the slot expension in the cpu.  NIC used to determines the speed , message, sending and receiving of the data transmission.

   v  Bridge , it is used to connect the similar networks using same protocol.

  v Gateway, it is used to connect with the computers on the other networks. It’s the collection of hardware/software that let’s the computer to communicate with other computers on dissimilar networks. One of the main task of the gateway is protocol conversion.

  v  Base Station : a Wireless access point often called base station is used to connects to a wired area networks provides wireless transmit / receive capabilities over a radius of several hundered feet. Even through non-metal walls, computers can connect with wireless NIC’s to the network through these access points. 

Metropolitan Area Networks (MAN):

A metropolitan area network, or MAN (plural: MANs, not MEN) is basically a bigger version of a LAN and normally uses similar technology. It might cover a group of nearby corporate offices or a city and might be either private or public. A MAN can support both data and voice, and might even be related to the local cable television network. A MAN just has one or two cables and does not contain switching elements, which shunt packets over one of several potential output lines.

Wide Area Network (WAN)

A WAN is a data communications network that covers a relatively broad geographic area (i.e. one city to another and one country to another country) and that often uses transmission facilities provided by common carriers, such as telephone companies.