PP Presentation
- protocol fails if both xmit at same time, half the frames contain dups.
A sends(0,1,A0)
A gets(0,1,B0)
A sends(0,0,A0)
A gets(0,0,B0)
A sends(1,0,A1)
A gets(1,0,B1)
A sends(1,1,A1)
(seq,ack,pack#)
B sends(0,1,B0)
B gets(0,1,A0)
B sends(0,0,B0)
B gets(0,0,A0)
B sends(1,0,B1)
B gets(1,0,A1)
B sends(1,1,B1)
B gets(1,1,A1)
B sends (0,1,B2)