ARP (Address Resolution Protocol)

 

ARP (Address Resolution Protocol) Table

The problem encountered while performing local routing may be summarized as follows:

1. How does host A know whether host B is in the same subnet?

2.      How does host A obtain the MAC address of host B?

3.      How does host A know that it can send the packet to router R so that the packet can reach host C that is in other subnet?

4.      How do hosts determine which router to use if two or more routers are connected to the same LAN?