Sequence Number Lower Bound (1)

• This involves some mathematical juggling

• Host A will only send data for which it did not receive an ACK

• Thus s S maximum {ack} of packets sent by B and seen by A.

• Upperbound implies: max {s+n} packets sent by A and seen by F R max {ack} of packets sent by B and seen by A + max {win} of packets sent by B and seen by A

Notes: