what is the role of UDP checksum ?

January 5, 2010 at 22:11:42
Specs: Windows XP
am not new to this domain but i never did analysis on the theory !!!!! :(
I dont know whether this is the right place to ask this question !!!!
we studied that UDP is conection less unreliable, which cannot avoid duplicate packets, cannot order the packets....

Q.1) If data integrity is not guaranteed by UDP then what is the role of 'checksum' field in UDP header ?

Q.2) what does the connection mean whether in TCp or UDP is it that all packets will follow the same routers and switches ?

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January 6, 2010 at 06:46:42

There is no such thing as a UDP connection. It is a "connectionless" transport protocol, as the site above explains. Packets are sent & packets are received. There is no handshake, as in TCP. It also has an explanation of the checksum.

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