Given the 3 frames how is the acknowledgment receipt of 2700 calculated? Transmission Control Protocol, Src Port: http (80), Dst Port: 52545 (52545), Seq: 1, Ack: 973, Len: 1460 Transmission Control Protocol, Src Port: http (80), Dst Port: 52545 (52545), Seq: 1461, Ack: 973, Len: 1239 Transmission Control Protocol, Src Port: 52545 (52545 ), Dst Port: http(80), Seq: 973, Ack: 2700, Len: 0 asked 14 Mar '12, 07:42  dingdong123 edited 14 Mar '12, 07:43 |
One Answer:
Simple: Sequence No from the second packet plus its length: 1461 + 1239 = 2700. answered 14 Mar '12, 07:48  Jasper ♦♦ |
thanks. Also what is the explanation for the 3rd frames length being 0?
Also simple: its only purpose is to acknowledge the first two frames, but the node has no own content to transmit. In that case the TCP payload length is zero - a quite common thing to observe.