Answer Posted / ramganesh1982
The previous answers are sufficient enough for this
question especially Answer 1 ,but a more precise and
detailed answer [if needed] is added here
ARP is used to map a destination IP address to its MAC
address.An ARP request when added to a IP datagram has the
following fields to it [Note that a ARP request packet is
added to the IP datagram in the DATA Field]...
1) Hardware Type [Ethernet/Token Ring .. Details]
2) Protocol Type [IP/IPX ..details]
3) Operation field
[ARP Req,ARP reply,Proxy ARF Req,Proxy ARP Reply]
4) H/w Length
5) Protocol Length
6) Source IP
7) Source MAC addr
8) Destination IP
9) Destination MAC addr
Here the main focus will be on the fields 6-9 ..
6) Source IP [needs no explanation]
7) Source MAC addr [needs no explanation]
8) Destination IP [needs no explanation]
9) Destination MAC addr [This will be 0000:0000:0000]
So,how do we say a ARP request is broadcasted ?
Yes,it is broadcasted ... The reason is that,the
Destination MAC address at Layer 2 will be FFFF:FFFF:FFFF
whereas the Destination MAC on a ARP Packet will be 0000:
0000:0000 which is encapsulated as a payload in a datagram.
On receving this ARP request the Destination will fill its
own MAC address in place of all 0's and send it back to the
source as ARP reply.
| Is This Answer Correct ? | 15 Yes | 3 No |
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