A station running TCP/IP needs to transfer a file to a host. The file contains 2,048 bytes. How many bytes, including all of the TCP/IP overhead, would be sent, assuming a payload size of 512 bytes and that both systems are running IPv4? (Also assume that the three-way handshake and window size negotiation have been completed and that no errors occur during transmission.)
a) What is the protocol overhead (stated as a percentage)?
b) Perform the same calculation, this time assuming that both clients are using IPv6.
Hosts A and B are communicating over a TCP connection, and Host B has already received from Host A all bytes up through (and including) byte 248. Suppose Host A then sends two back-to-back segments to Host B. The first and second segments contain 40 and 60 bytes of data, respectively. In the first segment, the sequence number is 249, the source port number is 503, and the destination port number is 80. Host B sends an acknowledgment (ACK) whenever it receives a segment from Host A.
- In the second segment sent from Host A to Host B, what are the sequence number, source port number, and destination port number?
- Assume that the first segment arrives before the second segment. In the acknowledgement of the first arriving segment, what are the acknowledgement sequence number, the source port number, and the destination port number?
- Assume that the second segment arrives before the first segment. In the acknowledgement of the first arriving segment what is the acknowledgement sequence number?