What is network topology ?

What is network topology ?
                                                          A  network can be arranged in 
        in different ways . The physical layout or arrangement
        of connected devices in a network is called network topology.
        It is the shape of network .
        Different network topologies are as follows.
         1.    Bus topology 
         2.    ring topology
         3.    mesh topology 
         4.    star topology 
         5.    tree topology 
         
   Bus topology .
                            bus topology is the simplest type
of network.
    In bus topology all computers or network nodes are connected
   to a common communication medium.

Star topology .
 All computer in star topology are connected with a central device called a hub . Star topology is mostly used in client -server .network
   
  Ring topology 
                         IN ring topology , each computer is connected to the next computer   with the last one connected to the first.
Tree topology
  
Tree topology
                     A tree topology combines the charecteristics of bus 
       and star topology .it consists of different groups of computer 
       attached in star topology .

Mesh topology 

                       IN a mesh topology every device in the network
            is physically connected to every other device in the network.