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+2 votes
In bootp protocol client puts all 0 in source IP and broadcast the packet.Then relay agent encapsulate that in a unicast packet and send to boot p server.

How does boot p server know the Mac address of the client to which it is assigning the address ?
asked in Computer Networks by Veteran (15.1k points) 13 115 323 | 34 views

1 Answer

+3 votes
Best answer
The unicast packet forwarded by relay agent has source MAC addr
answered by Loyal (3.1k points) 3 6 50
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How will relay agent gets the source mac ?Source will create the packet as :-

Data | | 255.555.555 .

How will now relay agent gets the MAc address. Is it DLL layer which encapsulates this packet at source  put Mac or something else?
Packet is further encapsulated by DLL header and CRC trailer
and DLL header has source and destination MAC.
A Frame encapsulates packet and this frame is actually transmitted.
Remember OSI hierarchy

source will create--> Data | | 255.555.555  at NL, at DLL packet will look like,

IP_packet | MACsource | and transfered to relay agent...


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