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Network Server

NETWORK SWITCH

A network switch (or just switch) is a networking device that performs clear bridging (connection of multiple network segments with forwarding based on MAC addresses) at up to the speed of the equipment. Common hardware includes switches, which can connect at 10, 100, or 1000 megabits per second, at half or full duplex. Half duplex means that the machine can only send or receive any given time, whereas full duplex can send and receive at the same time. The use of specially designed expansion also makes it possible to have large numbers of connections utilizing different mediums of networking, including Ethernet, Fibre Channel, ATM, 802.11, to name frequently used technologies.

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A switch can connect Ethernet, token ring, Fibre Channel or other types of packet switched network segments together to form an internet work.
 

If a network has only switches and no hubs then the collision domains are either reduced to a single connection or, if both ends support full duplex, eliminated altogether. The principle of a fast hardware forwarding device with many ports can be complete to higher layers giving the multilayer switch.

A multi port repeater is the simplest multi-port machine in use. However, its technology has been considered obsolete since a hub is a "dumb device", as it resends every datagram it receives to every port except the initial incoming.

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