Switch Table

985
Link-layer Switches
Link-layer Switches

As illustrated in Figure 1, modern Ethernet LANs use a star topology, with each node connecting to a central switch. Up until this point, we have been unclear about what a switch actually does and how it works. The role of the switch is to receive incoming link-layer frames and

Tags star topology, buffers, switch table, forwarding table
431
Self-Learning
Self-Learning

A switch has the amazing property (particularly for the already-overworked network administrator) that its table is built automatically, dynamically, and autonomously - without any interference from a network administrator or from a configuration protocol. In other words, switches are self-learning. This capability is accomplished as follows:

Tags network administrator, self-learning, switch table
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