NETWORK TOPOLOGY-TYPES OF NETWORK TOPOLOGIES

WHAT IS NETWORK TOPOLOGY?

—  Network Topology is the pattern used to arrange nodes or devices of the network.

—  It defines the path used by devices for communication

TYPES OF NETWORK TOPOLOGIES

WIRED TOPOLOGY

—  In wired topology devices are connected with the help of wires.

—  Types of wired topologies are:

Ø  Bus Topology         

Ø  Ring Topology               

Ø  Star Topology

Ø  Mesh Topology

BUS TOPOLOGY

—  In bus Topology all devices are connected by a single cable with the help of special connectors called BNC connectors or T connectors.

ADVANTAGES OF BUS TOPOLOGY

—  Since it uses only a single cable for the connection it is very simple and cheap

—  Failure of computer doesn’t affect the communication network

—  Easy to install

—  Addition of a new device is easy.

DISADVANTAGES OF BUS TOPOLOGY

—  Since it uses only a single cable for the connection it is very simple and cheap.

—  Failure of Backbone cable will lead to whole network failure because this single cable is the only connection between devices in the communication network.

STAR TOPOLOGY

—  In this all nodes or devices are attached with a centrally located device known as HUB.

—  All data is transferred from one node to another via central device

ADVANTAGE OF STAR TOPOLOGY

—  If one device or computer fails the remaining portion of the network is unaffected.

—  Easy to maintain

—  Mo transmission delays.

—  If one device or computer fails the remaining portion of the network is unaffected.

—  Easy to maintain

—  Mo transmission delays.

DISADVANTAGE OF STAR TOPOLOGY

·         System depends on the central node and if it fails then the whole system goes down.

RING TOPOLOGY

—  In the ring topology all the computers are connected in a circular loop.

—  There is no central device in it.

ADVANTAGE OF RING TOPOLOGY

• ·         There is no need for a central device.

DISADVANTAGE OF RING TOPOLOGY

—  The breakdown of any one of the link can result in failure of the whole network

MESH TOPOLOGY

—  In Mesh topology, each computer or device is connected to all other computer or devices in a network by dedicated link between all.

—  For ‘n’ nodes you will need (n*(n-1))/2 wires.

ADVANTAGE OF MESH TOPOLOGY

—  As there are the individual link between the devices for communication so one link breakdown will not affect the system.

—  Communication is fast between two nodes

DISADVANTAGE OF MESH TOPOLOGY

—  The use of too many redundant cables makes the mesh topology expensive. For ‘n’ nodes you will need (n*(n-1))/2 wires.

WIRELESS TOPOLOGY

—  In wireless topology devices are connected without the help of wires.

—  Types of wireless topologies are:

Ø  Infrastructure Topology         

Ø  Ad-hoc Topology               

Ø  Wireless Mesh Topology      

Ø  Mesh Topology

INFRASTRUCTURE TOPOLOGY

—  Can Have multiple Wireless Access Point

—  Wireless access point act as a link between wired star topology and wireless devices like laptops and phones.

ADHOC TOPOLOGY

—  Ad-hoc is the simplest wireless topology.

—  All devices in the ad-hoc are connected without wire peer-to-peer without the use of central connection.

—  It does not rely on cables, routers or a wireless access point.

WIRELESS MESH TOPOLOGY

—  Wireless Mesh is similar to wired Mesh

—  In Wireless Mesh Each Wireless Access Point communicates with each other