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what is ip payload? (example in scanned lecture notes attached)

Posted on 2009-05-12
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what is ip payload? Is it this;
http://en.wikipedia.org/wiki/IP_Payload_Compression_Protocol 

how come it is not included under the "Decapsulation again" slide?
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Question by:jtiernan2008
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marsilies earned 250 total points
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From
http://www.tcpipguide.com/free/t_IPDatagramGeneralFormat.htm

The IPv4 datagram is conceptually divided into two pieces: the header and the payload. The header contains addressing and control fields, while the payload carries the actual data to be sent over the internetwork.
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by:jtiernan2008
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thanks for your reply

ok... but why is there no payload in the "Decapsulation again" slide?
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by:tliotta
tliotta earned 250 total points
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jtiernan2008:

> ...why is there no payload in the "Decapsulation again" slide?

That seems to be because of what's not fully visible at the bottom of the slide -- "Gratuitous ARP Functionality".

See here, for example:

http://wiki.wireshark.org/Gratuitous_ARP

Without a description of the purpose of the slide, and an explanation how it fits into a series of slides, there can be a lot of guesses.

But a 'gratuitous ARP' packet doesn't exactly have a "payload" in the same sense as more widely understood datagrams. That is, there is no 'payload' for that diagram. None exists.

Tom
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