Networking devices

[ASPZIA]

Ther are two typeas of the networking devices
1.inter-network devices-used to conect devices/nodes with in a network..
2.intra -network devices-used to conect two or more networks

inter-network

a.Repeaters- used to regenerate the signal....i.e bring the signal to the orignal transmitted form..the shape of signal may get disturbed due to difffernt factors such as noise so repeaters are used to bring them back into orignal form ...note that the repeateres just repeat the signal and dont amplify it.......works in the physical layer

b.bridge -it is used within a network to reduce the traffic over the network.....e.g if 50 devices sare conected ti the right of the bridge and 50 to the left then if a device on the left side wants to send the data to a device on the same left side then the bridge stops the data to travel on the right side thus reducing the traffic.....works in thedata link layer that is one layer above the physical layer so has the power of the repeater as well....

c.switch/hub---both are used within a network....all the nodes are conected to the switch or a hub and comunicate through that.......the difference is that switch sends the data to a specific device while a hub broadcasts the data....e.g if there are 4 devices in the network A,B,C,D...noe if A wants to send data to C and network is using the switch ,the switch after recieving the data form A only sends it to C and not to B and D.....if the network is using the HUB , it after recieving the data from A sends it to all devices i.e B,C,D....now C accepts the data while B & D reject it


INTRA -NETWORK

ROUTER/Gateways....used to join to or moer seperate networks.......detail is given in another post by one of the members