04-06-2012, 01:25 PM
STAR TOPOLOGY
[attachment=24140]
WHAT IS TOPOLOGY
Topology is the nothing but the geometric representation of the relationship of all the links connecting the device (nodes).
Two or more device connecting a link two or more link form a topology.
The relationship on the basis are follows:-
PEER to PEER
PRIMARY – SECONDARY
PEER to PEER is relationship where the devices share the link equally.
In PRIMARY – SECONDARY relationship, one devices control and other devices have to transmit through it.
STAR LANs
In the star type LANs, the unshilded twisted pair is using as the transmission medium.
This is because the unshielded twisted pair is a telephone wire which is avilable each and every office building.
Each station connected to HUB and with the help of two links one for transmitting and the other for reception of the data.
Tipically the length of each link is 100m. If the twisted pair is used and the length may increase up to 500m. If the optical fiber is used as transmission medium.
EXTENDED STAR
A type of network topology in which a network that is based upon the physical star topology has one or more repeaters between the central node (the 'hub' of the star).
and the peripheral or 'spoke' nodes, the repeaters being used to extend the maximum transmission distance of the point-to-point links between the central node and the peripheral nodes beyond that which is supported by the transmitter power of the central node or beyond that which is supported by the standard upon which the physical layer of the physical star network is based.
DISTRIBUTED STAR
A type of network topology that is composed of individual networks that are based upon the physical star topology connected in a linear fashion – i.e., 'daisy-chained' – with no central or top level connection point (e.g., two or more 'stacked' hubs, along with their associated star connected nodes or 'spokes').
network topology that is set up in a circular fashion in which data travels around the ring in one direction and each device on the right acts as a repeater to keep the signal strong as it travels. Each device incorporates a receiver for the incoming signal and a transmitter to send the data on to the next device in the ring. The network is dependent on the ability of the signal to travel around the ring.
ADDVATAGES.
It is eassy to modified and add new computer in a star net work without disturbing the rest of the network.
The center of the star is called as HUB the best place to find network fault.
Single computer failures do not necessarily bring down the whole star network.
Different type of cable can used in the same network with a hub that can accumoded multiple cable types.
[attachment=24140]
WHAT IS TOPOLOGY
Topology is the nothing but the geometric representation of the relationship of all the links connecting the device (nodes).
Two or more device connecting a link two or more link form a topology.
The relationship on the basis are follows:-
PEER to PEER
PRIMARY – SECONDARY
PEER to PEER is relationship where the devices share the link equally.
In PRIMARY – SECONDARY relationship, one devices control and other devices have to transmit through it.
STAR LANs
In the star type LANs, the unshilded twisted pair is using as the transmission medium.
This is because the unshielded twisted pair is a telephone wire which is avilable each and every office building.
Each station connected to HUB and with the help of two links one for transmitting and the other for reception of the data.
Tipically the length of each link is 100m. If the twisted pair is used and the length may increase up to 500m. If the optical fiber is used as transmission medium.
EXTENDED STAR
A type of network topology in which a network that is based upon the physical star topology has one or more repeaters between the central node (the 'hub' of the star).
and the peripheral or 'spoke' nodes, the repeaters being used to extend the maximum transmission distance of the point-to-point links between the central node and the peripheral nodes beyond that which is supported by the transmitter power of the central node or beyond that which is supported by the standard upon which the physical layer of the physical star network is based.
DISTRIBUTED STAR
A type of network topology that is composed of individual networks that are based upon the physical star topology connected in a linear fashion – i.e., 'daisy-chained' – with no central or top level connection point (e.g., two or more 'stacked' hubs, along with their associated star connected nodes or 'spokes').
network topology that is set up in a circular fashion in which data travels around the ring in one direction and each device on the right acts as a repeater to keep the signal strong as it travels. Each device incorporates a receiver for the incoming signal and a transmitter to send the data on to the next device in the ring. The network is dependent on the ability of the signal to travel around the ring.
ADDVATAGES.
It is eassy to modified and add new computer in a star net work without disturbing the rest of the network.
The center of the star is called as HUB the best place to find network fault.
Single computer failures do not necessarily bring down the whole star network.
Different type of cable can used in the same network with a hub that can accumoded multiple cable types.