network general

Question

Which type of ACK is used in 802.5?

Response:

	Cumulative ACK
	Independent ACK
	Piggybacking ACK
	None of these

Answer 1

piggybacking ack, because in token ring, frame contains a frame status byte which have two bits A(Address recognized) and C(frame copied) which are initially and 0 and 0 after sending data received by destination they are changed by 1 and 1  and  coming back to the sender with A =1 and C =1 which is piggybacking ack .

Ref: http://www.cs.montana.edu/~halla/csci466/lectures/lec10-2.7-token.html