As in the figure below, receiver cannott see the sender side and the receiver behavior identical in both cases. This is known as the “SR Dilemma”. How can you avoid this dilemma? (Hint: related to the sizes of the sender window and the sequence number.)

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sender window (after receipt) receiver window (after receipt) 0123012 -pkto 0123012 pkti 0123012 pkt2 0123012 -pkto 0123012 -pkt1 0123012 pkt2 0123012 01230 12 0 123012 0123012 0 123012 0123012 123012pkt3 timeout retransmit pkto X 0123012 -pkto 0123012 pkto will accept packet with seg number 0 will accept packet with seq number 0 (a) no problem (b) oops! sender window (after receipt) receiver window (after receipt) 0123012 -pkto 0123012 pkti 0123012 pkt2 0123012 -pkto 0123012 -pkt1 0123012 pkt2 0123012 01230 12 0 123012 0123012 0 123012 0123012 123012pkt3 timeout retransmit pkto X 0123012 -pkto 0123012 pkto will accept packet with seg number 0 will accept packet with seq number 0 (a) no problem (b) oops!