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A) Does digital signature provide privacy

B) when questions are asked like RIP uses TCP or UDP, SMTP uses what etc etc....how do we know if it requires TCP or UDP...its smtn we should know or is there a way to find it or something

C) Is Back off algo used oly by CSMA?

D) Assume sliding window protocol with window size W , seq number starting from 1 and whn sender send packet with seq num K it send ack as K + 1..which is correct

1.between two ack sender never sends more than 1 packet

2.sender must retransmit packet for every duplicate ack it receives

3.any new(previously unsent) packet  with seq number greater than W is sent by sender iff  a new(previously unseen) ack arrives

E) An ARP request packet include MAC address field and IP address of the receiver contains all 0's -true or false

F) what is hamming distance and to detect d errors the hamming distance should be?
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