Arp (Address Resolution Protocol)

 

1. ARP FIND MAC ADDRESS OF HOST FROM ITS KNOWN IP ADDRESS.

2. IT IS LAYER TWO PROTOCOL.

 3. ARP REQUEST IS A BROADCAST BUT ARP RESPONSE IS A UNICAST.

 4. THE ARP CONCEPT USED ONLY IN IPV4 ENVIRONMENT.

 5. ARP IS A NEVER GENERATED FOR THE DEVICE OF OTHER NETWORK.

6. THE ARP PROTOCOL CONVERTS THE MAC ADDRESS INTO AN IP ADDRESS.

7. THE ARP PROTOCOL CONVERTS THE MAC ADDRESS INTO AN IP ADDRESS  BUT A SWITCH COMMUNICATES BAESED ON MAC ADDRESS.

BUT IS BACKEND IS  IP ADDRESS FOR COMMUNICATION BUT WE PING ITS THE MAC-ADDRESS RESOLVED INTO IP ADDRESS.

8. THE ARP PROTOCOL IS COMMONLY USED TO FIND OUT THE MAC ADDRESS OF DEVICES.

TYPES OF ARP

1. ARP

2. PROXY ARP

3.  REVERSE ARP

4. GRATITUOS ARP

______________

PACKET FORMATE OF ARP

____________________

IF YOU HAVE TO COMMUNICATE ANYWHERE IN THE WORLD OR SEND A DATA PACKET OR TRANSMIT A DATA PACKET,THEN YOU MUST KNOW THESE THINGS IN THIS DATA PACKET. IF YOU DO NOT KNOW THESE THINGS, YOU IT WILL NOT BE ABLE TO SEND DATA PACKETS.

_____________________

ACCORDING TO THIS TOPOLOGY, IF A PC1 WERE TO FIND OUT THE MAC ADDRESS OF A PC2, IT WOULD SEND AN ARP REQUEST IN ONE OF THE FOLLOWING WAYS.

ACCORDING TO THIS TOPOLOGY, WHEN PC 1 WILL GENERATE AN ARP REQUEST TO THE SWITCH TO FIND OUT THE MAC ADDRESS OF PC 2, SOMETHING LIKE.

Arp Technology Formate

According My Topolgy Formate

FFF MEANS BROADCAST THE REQUEST MEANS SEND REQUEST TO ALL PC'S.

THE ARP REQUEST IS BROADCAST AND WHEN IT IS BROADCAST, THE ONE FOR WHOM IT IS BROADCAST, .WHOSE IP ADDRESS IS GIVEN IN THE DESTINATION, THAT RECIEVE THE PACKET. THEY WILL GET UP AND GENERATE A PACKET AGAIN.