LAN (Local Area Network)

LAN (Local Area Network) 


 Lan or Local Area Network is usually used for a network connection between the computer 1 to several computers or from multiple computers to multiple computers. usefulness is in addition to the connection could be to transfer data from one computer to another computer.

     
Usually in pengkoneksian lan using Belden cable or coaxial. interface that serves as a connection medium. in general most people use Belden cable with a connector that is commonly known by the term UTP. UTP cable is very very easy in setnya and easier to use.

     
Some network interfaces that exist within the network topology. why Lan require network topology? it is meant to map the location or place the computer 1 with the others, the following flow network cable. for easy maintenance / repair track.

    
Generally there are 3 kinds of topology are commonly used: 1.Cross 2.Star 3.Mesh 4.Bus 5.Ring 1.Cross

    
That is a network system that uses the server as a regulator of its network. so that data security can be maintained. because all users of its network has been set by the admin (user server computer users.) so that other users can only use the network according to their needs. The following below is an example of cross topology:



deficiencies in the system topology is a cross cable when the server is dead, then other users can not access the network. so that the use of cross topology usually have the admin user. that is representative of the administrator in the network settings if the computer administrators have a problem. This cross topology can also use the hub if the long route users to the server more than 100 meters. because the connection strength is only 100 meters UTP cable. 

2. Star

       
Star topology is generally a simple lan network. due to the interface connector is only centered on the hub. Existing hub in star topology is usually only serves as a connector interface of a network into multiple networks without requiring a server computer as a regulator. weaknesses in the security system is a weak star. in the absence of the administrator as a regulator of tissue.

 

3.Mesh

      
In the mesh topology, usually called the "pure peer to peer". because the only link between computers without using a hub. and this topology is rarely used. due to the complex and also very weak securities owned.  

4. Bus

     
Bus network topology is the connection interface has only 1 network as a connection. without incorporating the other connections. This bus topology is usually used to transit data with backbone. 
 

5. Ring


       
Ring is the topology resembles a network that forms a ring. as well as star topology and bus topology. ring topology does not have an administrator as a regulator of its network. only PC to PC connection is not regular. so that the securities in the ring topology is very weak.