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What is the efficiency of the system

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Reference no: EM132435063

Question 1:

A 120-byte message is sent through a private internet using the TCP/IP protocol suite (IPv4). If the protocol adds a 15-byte header at each layer (assume headers are added only at layers 5, 4, 3, and 2), what is the efficiency of the system (the ratio of the number of useful bytes to the number of total bytes)?

Question 2:

Host A and B are communicating over a TCP connection, and Host B has already received from A all bytes up through byte 104. Suppose that Host A then sends two segments to Host B back-to-back. The first and second segments contain 30 and 60 bytes of data, respectively. In the first segment, the sequence number is 105, the source port number is 500, and the destination port number is 80. Host B sends an acknowledgement whenever it receives a segment from Host A.

1 In the second segment sent from Host A to B, what are the sequence number, source port number, and destination port number?

2 If the first segment arrives before the second segment, in the acknowledgement of the first arriving segment, what is the acknowledgment number, the source port number, and the destination port number?

3 If the second segment arrives before the first segment, in the acknowledgement of the first arriving segment, what is the acknowledgment number?

Reference no: EM132435063

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