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1.1 | LAN Switching |
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1.1.4 | LAN switching overview |
LAN switches are considered multiport
bridges with smaller collision domains because of microsegmentation. Switches achieve this high-speed
transfer by reading the destination layer 2 MAC address of the packet
much like a bridge does. Ethernet switching increases the bandwidth available on a network. It does this by creating dedicated network segments (point to point connections) and connecting those segments in a virtual network within the switch. This virtual network circuit exists only when two nodes need to communicate. This is why it is called a virtual circuit - it exists only when needed and is established within the switch. Even though the LAN switch creates dedicated, collision-free domains, all hosts connected to the switch are still in the same broadcast domain. Therefore all other nodes connected through the LAN switch will still see a broadcast from one node.
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