Draw a space-time diagram similar to Figure 3.22 of textbook for the following problem: Sender is sending 10 packets to receiver. Stop after 7 packets are accepted by receiver. Protocol Used: Go-Back-N Sliding Window size = 6 Timeout interval =1RTT Assume transmission time of a packet = 1/4 RTT Assume Packet 1 is lost, then ACK 2 is lost, and then ACK 6 is lost Note: The sender starts a timer when base = nextseqnum, i.e. at beginning of your example. Then when an ACK is received, if base is not nextseqnum, the timer is started.
Draw a space-time diagram similar to Figure 3.22 of textbook for the following problem: Sender is sending 10 packets to receiver. Stop after 7 packets are accepted by receiver. Protocol Used: Go-Back-N Sliding Window size = 6 Timeout interval =1RTT Assume transmission time of a packet = 1/4 RTT Assume Packet 1 is lost, then ACK 2 is lost, and then ACK 6 is lost Note: The sender starts a timer when base = nextseqnum, i.e. at beginning of your example. Then when an ACK is received, if base is not nextseqnum, the timer is started.
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Draw a space-time diagram similar to Figure 3.22 of textbook for the following problem: Sender is sending 10 packets to receiver. Stop after 7 packets are accepted by receiver.
Protocol Used: Go-Back-N
Sliding Window size = 6
Timeout interval =1RTT
Assume transmission time of a packet = 1/4 RTT
Assume Packet 1 is lost, then ACK 2 is lost, and then ACK 6 is lost
Note: The sender starts a timer when base = nextseqnum, i.e. at beginning of your example. Then when an ACK is received, if base is not nextseqnum, the timer is started.
Transcribed Image Text:Sender
Receiver
send pkt0
rcv pkt0
send pktl
send ACKO
rcv pktl
send pkt2
send ACK1
X
(loss)
send pkt3
(wait)
rcv pkt3, discard
send ACK1
rcv ACKO
send pkt4
rcv ACK1
send pkt5
rcv pkt4, discard
send ACK1
pkt2 timeout
send pkt2
rcv pkt5, discard
send pkt3
send ACK1
send pkt4
send pkt5
rcv pkt2, deliver
send ACK2
rcv pkt3, deliver
send ACK3
Figure 3.22 • Go-Back-N in operation
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