q topology is a schematic representation of the
arrangement of a network, including Its nodes and connecting lines.
OR
The physical way the computers or nodes connect with each
other is called topology.
Bus topology
´ In the bus network topology, every workstation is
connected to a main cable called the bus.
´ For this purpose, coordination is required to decide which
computer has to use the line at what time.
´ In bus topology each computer is directly attached to
one another through the main cable or bus.
´ The network needs fewer wires than a star, however entire
network is disabled when a cable cut occurs.
Ring Topology:
´ In the ring network topology, the workstations are
connected in a closed loop configuration.
´ Adjacent pairs of workstations are directly connected.
´ Other pairs of workstations are indirectly connected, the data
passing through one or more intermediate nodes
´ The ring topology are logically ring but physically it may not
be resemble like ring.
´ It is easy to coordinate access to other computers however
entire network is disabled if a cable cut occurs.
Mesh Topology:
´ The mesh network topology employs either of two
schemes, called full mesh and partial mesh.
´ In the full mesh topology, each workstation is connected
directly to each of the others.
´ In the partial mesh topology, some workstations are
connected to all the others, and some are connected only to those other nodes
with which they exchange the most data.
Tree Topology
´ The tree network topology uses two or more star
networks connected together.
´ The central computers of the star networks are connected to a
main bus.
´ Thus, a tree network is a bus network of star networks.
Star topology:
´ In the star network topology, there is a central hub
or server to which all the workstations are directly connected.
´ Every workstation is indirectly connected to every other through
the central hub
´ the network are not like a star shape it may be irregular but
there connection just look like a star, that is the reason this topology is
called star topology or star network.
´ In term of cost of wire it take more wire than bus topology but
only one computer is affected when a cable cut occurs
