Safety No frames on link initially, packet 0 is first packet accepted at A, it is the only packet assigned SN=o, and must be the packet released by B if B ever releases a packet Subsequently(using induction) if b has released packets up to and including n-1, then rn is updated to n when n-1 is released, and only n can be released next Eytan modianoSafety • No frames on link initially, packet 0 is first packet accepted at A, it is the only packet assigned SN=0, and must be the packet released by B if B ever releases a packet • Subsequently (using induction) if B has released packets up to and including n-1, then RN is updated to n when n-1 is released, and only n can be released next Eytan Modiano 9