hari

• Aug 2nd, 2005

 

D. ones complement of the sum in ones complement 
 
The checksum field is the 16 bit one's complement of the one's 
complement sum of all 16 bit words in the header and text.

sameergupta

 Profile Answers by sameergupta 

• Sep 28th, 2005

 

In TCP/IP header,checksum is done with the following steps

Firstly the data is divided into groups of bits depending on the size of data

Then these bits are added and then the 1's complement of their sum is taken and is attached with the orginal data to be send.

So the most accurate answer given above will be C

GaganK

• Jun 29th, 2007

 

Answer is C....
Its actually 1's complement of the sum of the data being divided in 2 equal halves