Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation delay between the two nodes is 245 bit times. Suppose A and B send Ethernet frames at the same time, the frames collide, and then A and B choose different values of K in the CSMA/CD algorithm. Assuming no other nodes are active, can the retransmissions from A and B collide? For our purposes, it suffices to work out the following example. Suppose A and B begin transmission at t = 0 bit times. They both detect collisions at t = 245 bit times. Suppose KA = 0 and KB = 1. At what time does B schedule its retransmission? At what time does A begin transmission? (Note: The nodes must wait for an idle channel after returning to Step 2—see protocol.) At what time does A’s signal reach B? Does B refrain from transmitting at its scheduled time?
Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation...
5. (10 points) Multiple Access Protocols Suppose nodes A and B are on the same 10 Mbps Ethernet segment and the propagation delay between the two nodes is 225 bit times. Suppose A and B send frames at the same time, the frames collide, and then A and B choose their own values of K in the CSMA/CD algorithm. Assuming active, no other nodes are can retransmissions from A and B collide. For our purposes, it suffices to work out...
Assume that two nodes A and B are on the same segment of 10Mbps Ethernet. The propagation delay between the two nodes is 200 bits time( time to transmit 200 bits of data) .At time t=0, A begins transmitting a frame of 800 bits. Before A finishes , B begins to transmit . Can A surely detect a collision before finishing transmitting ? Hint: consider worst case for a possible collision when B can start transmitting. b) in the above...
Q6. Total: 7 marks] Nodes A and B are accessing a shared medium with propagation delay of 300 bit times between them (i.e., propagation delay equals to the amount of time to transmit 300 bits onto the link). A and B each have a frame of 1,000 bits (including all headers and preambles) to send to each other. a) (3 marks] In the worst case, how many bits would A have sent out when it detects collision? Briefly show how...
7. (4 pointa) Cossider two nodes A and B consected vis an Etheret bo of 48Mbps Suppone that the two nodes are the oaly sodes, and that the propsantion delay betwern temi 240 Suppose that both nodes each bas a frame to send, and st tve t After coll ision, node A chooses KA 0 and node B chocees Kp 1. Rl th, i the CSMA/CD 0 they bot algorithm, right after detecting a collislon, a node mrst seud a...
help with computer network questions 1. What is the difference between circuit switching and packet switching? 2. What are the different layers in today’s Internet? Why do we create layers? 3. Suppose there is a 10 Mbps microwave link between a geostationary satellite and its base station on Earth. Every minute the satellite takes a digital photo and sends it to the base station. Assume a propagation speed of 2.4 * 10^8 meters/sec. a. What is the propagation delay of...
Suppose that Router A and Router B are connected via a 10 Kbps link, and that the two routers are 20 meters apart. Suppose that Router A is transmitting a packet, and that there are 7 additional packets in the queue of the router, when a new packet arrives at Router A. Suppose that 500 bits of the currently-being-transmitted packet has been transmitted by Router A. Also, assume the following a. Every packet consists of 1000 bits. b. Propagation speed...
Please answer me as soon as possible Quiz Question 1 (1 point) Saved What metric is used to measure bandwidth? Question 1 options: a. msec b. bit/sec c. bytes d. number of packets/sec Question 2 (1 point) Saved Ethernet is one of access network technologies. Question 2 options: True False Question 3 (1 point) Saved Consider two hosts, A and B, connected by a single link of rate R bps. Suppose that the two hosts are separated by m meters,...