Address Resolution Protocol (ARP)
ARP is used to translate an IP
address into MAC address.
If Computer1 wants to communicate with Computer2 on a LAN, when it comes to Layer2 Communication ( Data
Link Layer ), computers identify each other with MAC addresses.
When Comp1 gets the IP of Comp2:
Ø It looks at
its own cache to see if it has the MAC address
Ø If present,
it appends message with the address and sends it over. Else, it will broadcast
a message to all the systems in the network asking for a MAC address
Ø The ARP
Request is received by all the systems but only the computer with the target IP
responds to it
Ø Now, since
both Comp1 & Comp2 have IP and MAC, they can communicate
No comments:
Post a Comment