Computer Networks
What are the states from which a TCP host may send new data received from its application? FIN_WAIT_1 CLOSE_WAIT SYN_SENT ESTABLISHED QUESTION 15 A TCP receiver has a receive buffer of size 6400 bytes. The first 800 bytes, indexed 1 through 800, were received without loss. The application at the receiver consumed all 800 bytes. A new segment containing bytes indexed 1001 through 1200 was received. What is the receive window value indicated by the receiver in its ACK to the sender? QUESTION 16 Hosts A and B have a TCP connection with neither side having any unacknowledged data. Cumulative ACKs are used. Now, host A sends five TCP segments back to back to host B.The first segment has sequence number 150, the second segment 180, the thrid 220, the fourth 240, and the fifth 260. Host B receives the first, third, fourth, and fifth segments but not the second segment. If B sends an ACK in response to each segment received, what are the values of the ACKs received by A? and Consider a telnet session with a user on host A and a telnet server on host B. The last segment exchanged was from A to B with sequence number=50 and ACK number=90. Assume that there are no packet losses and neither side has any unacknowledged data. Now, suppose the user types a letter, which results in three segments exchanged between A and B. The second segment is from host to host with sequence number and ACK number QUESTION 19 Hosts A and B have a TCP connection with neither side having any unacknowledged data. Now, host A sends two TCP segments back to back to host B. Host B sends an acknowledgement (ACK) for each segment. Host A receives the second ACK, but not the first one. How many packets does host A retransmit? QUESTION 20 A Wireshark trace of TCP traffic between hosts A and B indicated the following segments. Host A sent a segment with SYN flag set to B at time 0 seconds. Host A retransmitted the SYN segment at 1 second, 3 seconds, and 7 seconds. What are the retransmit timeout (RTO) values at host A after sending the first retransmission at time 1 second and after the second retransmission? seconds and seconds. What are the states from which a TCP host may send new data received from its application? FIN_WAIT_1 CLOSE_WAIT SYN_SENT ESTABLISHED QUESTION 15 A TCP receiver has a receive buffer of size 6400 bytes. The first 800 bytes, indexed 1 through 800, were received without loss. The application at the receiver consumed all 800 bytes. A new segment containing bytes indexed 1001 through 1200 was received. What is the receive window value indicated by the receiver in its ACK to the sender? QUESTION 16 Hosts A and B have a TCP connection with neither side having any unacknowledged data. Cumulative ACKs are used. Now, host A sends five TCP segments back to back to host B.The first segment has sequence number 150, the second segment 180, the thrid 220, the fourth 240, and the fifth 260. Host B receives the first, third, fourth, and fifth segments but not the second segment. If B sends an ACK in response to each segment received, what are the values of the ACKs received by A? and Consider a telnet session with a user on host A and a telnet server on host B. The last segment exchanged was from A to B with sequence number=50 and ACK number=90. Assume that there are no packet losses and neither side has any unacknowledged data. Now, suppose the user types a letter, which results in three segments exchanged between A and B. The second segment is from host to host with sequence number and ACK number QUESTION 19 Hosts A and B have a TCP connection with neither side having any unacknowledged data. Now, host A sends two TCP segments back to back to host B. Host B sends an acknowledgement (ACK) for each segment. Host A receives the second ACK, but not the first one. How many packets does host A retransmit? QUESTION 20 A Wireshark trace of TCP traffic between hosts A and B indicated the following segments. Host A sent a segment with SYN flag set to B at time 0 seconds. Host A retransmitted the SYN segment at 1 second, 3 seconds, and 7 seconds. What are the retransmit timeout (RTO) values at host A after sending the first retransmission at time 1 second and after the second retransmission? seconds and seconds
