关键词 > COMP3331/9331
COMP 3331/9331 Computer Networks and Applications Transport Layer (2) - Questions
发布时间:2023-07-04
Hello, dear friend, you can consult us at any time if you have any questions, add WeChat: daixieit
COMP 3331/9331 Computer Networks and Applications
Transport Layer (2) - Questions
Q1) Given the following scenario, populate the TCP header fields that follow for the Sequence Number, Acknowledgement Number, and Flags.
Q2) TCP waits until it has received three duplicate ACKs before performing a fast retransmit. Why do you think the TCP designers chose not to perform a fast retransmit after the first duplicate ACK for a segment is received?
Q3) Consider transferring an enormous file of L bytes from Host A to Host B. Assume an MSS of 536 bytes and ISN is 1.
a. What is the maximum value of L such that TCP sequence numbers are not exhausted?
b. For the L you obtained in part (a), find how long it takes to transmit the file. Assume that a total of 66 bytes of transport, network and data link layer headers are added to each segment before it is sent out on a 155Mbps link. Ignore flow control and congestion control so that A can pump out packets continuously in a back-to-back manner