Computing Packet Transmission Delay. Suppose a packet is L = 1200 KB long (one byte = 8 bits), and link transmits at R = 100 Mbps. What is the transmission delay for this packet?
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- Computing Packet Transmission Delay. Suppose a packet is L = 3000 bytes long (one byte = 8 bits), and link transmits at R = 2 Mbps. What is the transmission delay for this packet? L: packet length (in bits) R: link transmission rates (Mbps) Queue of packets waiting for output link .000012 secs .0000015 secs 666,666 secs .0015 secs .012 secs Sorry, your answer isn't correct.Consider two hosts, A and B that are connected by a transmissions link of2.1 Mbps. Assume that packets are of length 2.0 Kb (Kilobits) and the length of the link is 100Km. a. What is the propagation delay from A to B, that is the amount of time from when the first bit of the packet is transmitted at A, until it is received at B? b. What is the transmission time of the packet at A (the time from when the first bit of the packet is sent into the wire and the time at which the last bit is sent into the wire). c. Suppose now that that length of the link is doubled. What is the propagation delay from A to B now and what is the transmission time? d. Now suppose that node C is connected to node B also by a 2 Mbps, 100 Km link. How long does it take from when the first bit is transmitted by A to when the last bit is received at C, assuming B operates in a store-and -forward manner?A packet switch receives a packet and determines the outbound link to which the packet should be forwarded. When the packet arrives, one other packet is halfway done being transmitted on this outbound link and four other packets are waiting to be transmitted. Packets are transmitted in order of arrival. Suppose all packets are 1,500 bytes and the link rate is 2 Mbps. What is the queuing delay for the packet? More generally, what is the queuing delay when all packets have length L, the transmission rate is R, x bits of the currently-being-transmitted packet have been transmitted, and n packets are already in the queue?
- a. Suppose N packets arrive simultaneously to a link at which no packets are currently being transmitted or queued. Each packet is of length L and the link has transmission rate R. What is the average queuing delay for the N packets? b. Now suppose that N such packets arrive to the link every LN/R seconds. What is the average queuing delay of a packet?Given a M/M/1 queue, which has packets arriving at a rate 2 packets/sec, an output link rate R bps, and an average packet size of 1500 bytes, write down: the expression for T, the average delay for a packet (i.e., from arrival till completing transmission at the output). b. the expression for the output utilization c. the expression for average number of packets in the queue d. the expression for average number of packets in the output NICConsider sending real-time data from Host A to Host B over a packet-switched network. Host A takes an 8-bit measurement every millisecond, and Host A collects these into 64-byte packets. There is one link between Hosts A and B; its transmission rate is 5 Mbps, its propagation delay is 2 × 108 meters/sec, and its length is 3 km. As soon as Host A gathers a packet, it sends the packet to Host B. How much time elapses from the time that Host A begins to take the first measurement in a packet until the entire packet reaches Host B?
- Consider a short, 10-meter link, over which a sender can transmit at a rate of 150 bits/sec in both directions. Suppose that packets containing data are 100,000 bits long, and packets containing only control (e.g., ACK or handshaking) are 200 bits long. Assume that N parallel connections each get 1/N of the link bandwidth. Now consider the HTTP protocol, and suppose that each downloaded object is 100 Kbits long, and that the initial downloaded object contains 10 referenced objects from the same sender. Would parallel downloads via parallel instances of non-persistent HTTP make sense in this case? Now consider persistent HTTP. Do you expect significant gains over the non-persistent case? Justify and explain your answerSuppose that a router receives simultaneously 3 packets (pkt1, pkt2, and pkt3) with length L1 = 1 Kbit, L2 = 8 Kbit, and L3 = 4 Kbit, respectively. The three packets are to be forwarded through the same link with transmission rate R = 4 Mbps. Packets are to be forwarded in the following order: pk1, pkt2, pkt3. R 1. What is the queueing delay of pkt1? 2. What is the queueing delay of pkt2? 3. What is the queueing delay of pkt3? 4. What is the average queueing delay at router R?Assume a small communication network, consisting of two user stations and a base station (BS). The users are recording and transmitting data collected by sensors and are transmitting the data frames using frequency band BW, (uplink). BS only collects data and acknowledges them. It uses a different band BWBs (downlink) for transmissions. The uplink and downlink channels are assumed perfect; no packets are lost due to bit errors. An Aloha protocol is used to access the medium by the BS and users. The users generate traffic following Poisson distribution, with frame generation rate lu. The time duration of data frames is Tf whereas the duration of acknowledgements is TAck: Determine the probability that the frame generated by a user will be lost.
- Consider two hosts S and R connected directly by a link. A link has a transmission speed of 107 bits/sec. It uses data packets of size 400 bytes. Data needed to transmitted is 400 bytes. Length of the link is 600 km and the propagation speed are 3 × 108 meter per second. T is the transmission delay and P is the propagation delay. The propagation delay in millisecond and transmission delay in microsecond respectively areCOMPUTING THE ONE-HOP TRANSMISSION DELAY Consider the figure below, in which a single router is transmitting packets, each of length L bits, over a single link with transmission rate R Mbps to another router at the other end of the link. Queue of packets waiting for output link Suppose that the packet length is L= 16000 bits, and that the link transmission rate along the link to router on the right is R = 1000 Mbps. L: packet length (in bits) R: link transmission rates (Mbps) Round your answer to two decimals after leading zeros QUESTION 1 OF 2 What is the transmission delay? AnswerIn the figure below a router is transferring packets, each of length L= 5 000 bits over a link with a transmission Rate R= 1 Mbps to another router at the other end of the link. The speed prorogation of the light signal on the link is 3x108 m/s. The length of the link is 1 Km. L: packet length (in bits) R: link transmission rates (Mbps) Queue of packets waiting for output link 1-Calculate the total transmission delay. 2- How many packets can be transmitted in one second.