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Definitions
Directory
Dictionary > Initials > Switch
Switch
Definition
Equipment network allowing the data-processing interconnection of equipment in local area network by optimizing the Band-width
Description
Contrary to the hub which is only one equipment network of level 1 (physical layer) of OSI model, the switch intervenes on level 2 (data link layer) of OSI model. This fundamental difference makes it possible the switch to transmit the traffic network only between the ports implied in the communication. For that, the switch embarks powerful algorithms of training enabling him to maintain and enrich a table by the equipment connected (via their MAC addresses) on each one of its ports. Consequently, when equipment connected on port 4 of a switch sends a screen bound for equipment connected on the port 14 of this same switch, only these 2 ports are inter-connected, all the other ports being preserved of this traffic network. But the arrival of the switches especially allowed the decoupling of the physical and logical structures of the networks (hitherto realized by expensive departmental routers), by integrating nativement the concept of virtual networks (VLAN). This possibility of dynamic redefinition of the logic design of a network thus makes it possible to adapt simply and quickly the segmentation of the traffic to the evolutions of the network.
Author
Anwar Hossain
Author Email
anwtele@yahoo.com
References
Switch Software Download Page