Phy Topologies

Physical Topologies Paras Verma 060341063

What is Physical It is the Physical layout of devices on the network. The Topology

way that the devices are connected to the network through the actual cables, the physical structure of the network is called the Physical topology. These are the types of Physical Topologies:  Bus Topology  Ring Topology  Star Topology  Mesh Topology  Cellular Topology

Bus Topology Topology in which all nodes, i.e. devices, are connected together by a single bus. Advantage:  Easy to implement  Good for temporary networks  Cheapest Topology  Requires less cables

Backbone

Drop Cables

Disadvantage:  Limited number of stations  Breakage of Backbone  Low security

A

Ring Topology Topology in which every node has exactly two branches connected to it.

E B D

Advantage: Disadvantage:  Quick Data Transfer  Data transmission through multiple node  Transmission is  Failure of any one node relatively simple cause healthy damage  Cable faults are easily  Difficult to install & identified reconfigure

C

Star Topology Topology in which peripheral nodes are connected to a central node which is called ‘Hub’. Advantage:  Easy to implement  Good for temporary networks  Failure of a Client  Centre of a Star helps finding fault  Easy to modify and adding new devices

Drop Cables

Disadvantage:  Failure of the central node  Cable Length  Number of stations

Mesh Topology Topology in which there are at least two nodes with two or more paths between them. Advantage: Disadvantage:  Extremely fault  Difficult to install tolerant & reliable  Difficult to True Mesh  Provides reconfigure as guaranteed number of devices increases capacity.  True Mesh is difficult to troubleshoot and isolate fault

Cellular Topology This Topology combines wireless pointto-point and multipoint strategies to divide a geographic area into cells. Advantage:  Easy to Install  Easy to add new device  Fault isolation is easy

Disadvantage:  If Hub fails all devices affected  Antenna placement

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