Traditional Culture Encyclopedia - Traditional virtues - What's the difference between the switch's forwarding table and the router's and host's ARP cache tables?
What's the difference between the switch's forwarding table and the router's and host's ARP cache tables?
The switch forwarding table, which has only two main elements
The mac address ----- interface, indicates that the switch is looking for the destination mac address of the current message and sending it to the corresponding interface.
The principle of formation is that when an interface receives a message, it records the source mac address, and then the interface that received the message.
The arp table, whether for hosts or routers, is a correspondence between mac and IP.
Communication is mainly used when the IP address, in order to be able to forward in layer 2, will look up the IP corresponding mac address.
The principle of formation: whenever an ip message is received, the source IP and source mac address will be recorded as a cache of arp, the same IP different mac will believe that the last received correspondence.
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