There are several reasons for switches being included in network designs, but we will only select three for this article. First, a switch breaks one network into many small networks which assists in eliminating the distance and repeater limitations that abound in all Ethernet networks. As each Ethernet packet is sent from segment to segment the signal is regenerated and therefore can transverse longer distances. Second, this same segmentation isolates traffic and reduces collisions relieving network congestion. Unlike the
in which the hub creates an entire collision domain, network switches limit collisions to a single segment. Last of all, network switches inspect each packet. Some say this is a negative behavior of a switch because the switch has to use processing power and time to inspect the packet, but in reality packet inspection is an incredible benefit to the network. This inspection allows network switches to isolate broadcast storms by creating VLANs.
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