Sequence Number Upper Bound (2)

• A sends packets with sequence numbers in interval [s, s+n)

• Last octet in packet from A R maximum octet A is allowed to send

• Thus: s+n-1 R max {ack+win-1} of packets sent by B and seen by A

• But if a packet sent by B is seen by A it must have been seen by F too, and thus:

Notes: