*types of computer network:

                                                     *types of computer network:

   1.based on transmission technology
           
        2.beoadcast network
        3.based on geographical span
         4. based on relationship
          5.based on network topology

             

   
                                     1.types of computer network based on transmission technology:-

                                           

             * point to point
             
             * multipoint            

                          (these are also a types of computer network based on connection)

                                  2. types of computer network based on boardcast network:-

               * one to many boardcast network 

                           

                                  3.types of computer network based on geographical span:-

             * Local Area Network (LAN)
             * Metropolitan Area Network (MAN)
              * Wide Area Network (WAN)

                                   4.types of computer network based on relationship:-

                         *Peer-to-Peer Networks
                          *  Client/Server Networks
                          * Hybrid Networks

                                 5. .types of computer network based on network topology:-

                               * Topology:-

 way in which end points or stations of a network are linked together. : geometric representation of relationship of all links and linking devices

\(nodes) to each other.

                                 *Network Topology:-

Description of physical/logical connections of computers in a network indicating which pairs of computers are able to communicate and through which

 way is called network topology.

   

                                    * Network Topology or LAN Topology:

 

 1. Bus

2.  Ring

 3. Star

 4. Extended Star

  5.Tree

 6. Mesh

 7. Hybrid

                                              1. bus topology:-

         * Advantages:

1. Easy to understand, install and use for small networks

2. Cabling cost is less

 3.Easy to expand

 4.Failure of node does not affect network

              *Disadvantages:

         1. If channel fails, entire network fails

2.   Heavy network slows down network as only one computer can transmit data at a time.

                                               2. ring topology

 *  Advantages:

1. No computer can monopolies network because every computer is given equal access in network

 2.Easy to install and reconfigure

*Disadvantages:

1. Failure of computer in ring affect whole network

 2.Communication delay is directly proportional to number of nodes in network

                                                    3.star topology

   * Advantages:

1. Minimal line cost, n nodes require (n-1) lines

2. Failure of any node does not affect remaining portion of network

 3.If any of node is added in network, it does not affect communication delay

* Disadvantages:

 1.If central node fails, whole network fails

2. Distributed processing capability is limited

                                                 4.tree topology

  *Advantages:

 More computers and devices can be attached to single hub and therefore increase distance of signal can travel between devices/computers

*Disadvantages:

1. Cabling cost is more

 2.If central hub fails, system break down

 3.If levels increases, it may lead to complex networks

                                               5.mesh topology

*Advantages:

 1.Fast Communication

2. Distributed Control

 3.Fault can be diagnosed easily

 5.Reliable as failure of node does not affect other nodes

6.Security and Privacy as there is direct link between nodes

*Disadvantages:

 1.Cabling cost is more. In n nodes network, each node requires (n-1) links resulting in total of n(n-1)/2

 2.Installation is difficult

 3.Addition of new node in network raises cost multiple times depending on total existing nodes in network

                                          6.hybrid topology 

        it is mixture of two or more topology