Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation delay between the two nodes is 325 bit times. Suppose CSMA/CD and Ethernet packets are used for this broadcast channel. Suppose node A begins transmitting a frame and, before it finishes, node B begins transmitting a frame. Can A finish transmitting before it detects that B has transmitted? Why or why not? If the answer is yes, then A incorrectly believes that its frame was successfully transmitted without a collision. Hint: Suppose at time t=0 bits, A begins transmitting a frame. In the worst case, A transmits a minimum-sized frame of 512+64 bit times. So A would finish transmitting the frame at t=512+64 bit times. Thus, the answer is no, if B's signal reaches A before bit time t=512+64 bits. In the worst case, when does B's signal reach A?
Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation delay between the two nodes is 325 bit times. Suppose CSMA/CD and Ethernet packets are used for this broadcast channel. Suppose node A begins transmitting a frame and, before it finishes, node B begins transmitting a frame. Can A finish transmitting before it detects that B has transmitted? Why or why not? If the answer is yes, then A incorrectly believes that its frame was successfully transmitted without a collision. Hint: Suppose at time t=0 bits, A begins transmitting a frame. In the worst case, A transmits a minimum-sized frame of 512+64 bit times. So A would finish transmitting the frame at t=512+64 bit times. Thus, the answer is no, if B's signal reaches A before bit time t=512+64 bits. In the worst case, when does B's signal reach A?
Operations Research : Applications and Algorithms
4th Edition
ISBN:9780534380588
Author:Wayne L. Winston
Publisher:Wayne L. Winston
Chapter20: Queuing Theory
Section20.10: Exponential Queues In Series And Open Queuing Networks
Problem 8P
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![Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation
delay between the two nodes is 325 bit times. Suppose CSMA/CD and Ethernet packets are
used for this broadcast channel. Suppose node A begins transmitting a frame and, before it
finishes, node B begins transmitting a frame. Can A finish transmitting before it detects that B
has transmitted? Why or why not? If the answer is yes, then A incorrectly believes that its frame
was successfully transmitted without a collision. Hint: Suppose at time t=0 bits, A begins
transmitting a frame. In the worst case, transmits a minimum-sized frame of 512+64 bit times.
So A would finish transmitting the frame at t=512+64 bit times. Thus, the answer is no, if B's
signal reaches A before bit time t=512+64 bits. In the worst case, when does B's signal reach A?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F60240453-9a7a-4a56-b8e8-7c0b5ab6d02b%2F9d7e1f40-8aaa-4dfd-98fe-d00a25d40a54%2Fcttz3wb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation
delay between the two nodes is 325 bit times. Suppose CSMA/CD and Ethernet packets are
used for this broadcast channel. Suppose node A begins transmitting a frame and, before it
finishes, node B begins transmitting a frame. Can A finish transmitting before it detects that B
has transmitted? Why or why not? If the answer is yes, then A incorrectly believes that its frame
was successfully transmitted without a collision. Hint: Suppose at time t=0 bits, A begins
transmitting a frame. In the worst case, transmits a minimum-sized frame of 512+64 bit times.
So A would finish transmitting the frame at t=512+64 bit times. Thus, the answer is no, if B's
signal reaches A before bit time t=512+64 bits. In the worst case, when does B's signal reach A?
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