EBK COMPUTER NETWORKING
7th Edition
ISBN: 8220102955479
Author: Ross
Publisher: PEARSON
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Question
Chapter 6, Problem R4RQ
Program Plan Intro
Propagation delay:
It is nothing but the amount of time taken by the signal to travel from sender to receiver.
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Students have asked these similar questions
Consider two systems P and Q connected via a
router R with the bandwidth of 2 Gbps. The
length of the packet is 1000 bytes. The
propagation delay between P and Q is 200
microseconds. The distance between the P and
R is 10 km while the distance between R and Q
is 5 km. The propagation speed in meter per
second if each link is having the same
10³ km/s?
propagation speed is
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?
Consider a network connecting
two systems
located 4000 kilometers apart. The bandwidth of
the network is 500 x Mbps. The propagation
speed of the media is 4 × 106 meters per
second. It is needed to design a Go-Back-N
sliding window protocol for this network. The
average packet size is 107 bits. The network is to
be used to its full capacity. Assume that
processing delays at nodes are negligible. What
is the minimum size in bits of the sequence
number field?
Chapter 6 Solutions
EBK COMPUTER NETWORKING
Ch. 6 - Consider the transportation analogy in Section...Ch. 6 - If all the links in the Internet were to provide...Ch. 6 - Prob. R3RQCh. 6 - Prob. R4RQCh. 6 - Prob. R5RQCh. 6 - Prob. R6RQCh. 6 - Prob. R7RQCh. 6 - Prob. R8RQCh. 6 - Prob. R9RQCh. 6 - Prob. R10RQ
Ch. 6 - Prob. R11RQCh. 6 - Prob. R12RQCh. 6 - Prob. R13RQCh. 6 - Prob. R14RQCh. 6 - Prob. R15RQCh. 6 - Prob. R16RQCh. 6 - Suppose the information content of a packet is the...Ch. 6 - Suppose the information portion of a packet (D in...Ch. 6 - Prob. P4PCh. 6 - Prob. P5PCh. 6 - Prob. P6PCh. 6 - Prob. P7PCh. 6 - Prob. P8PCh. 6 - Prob. P9PCh. 6 - Prob. P10PCh. 6 - Prob. P11PCh. 6 - Prob. P12PCh. 6 - Prob. P13PCh. 6 - Prob. P14PCh. 6 - Prob. P15PCh. 6 - Prob. P16PCh. 6 - Prob. P17PCh. 6 - Prob. P18PCh. 6 - Prob. P19PCh. 6 - Prob. P20PCh. 6 - Prob. P21PCh. 6 - Prob. P22PCh. 6 - Prob. P23PCh. 6 - Prob. P24PCh. 6 - Prob. P25PCh. 6 - Prob. P26PCh. 6 - Prob. P27PCh. 6 - Prob. P32PCh. 6 - Prob. P33P
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Similar questions
- 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?arrow_forwardSuppose a system has 50 MB data to send on a network and transmit the data in burst at 8 Mbps, the maximum transmission rate across routers in the network is 6 Mbps, if system uses leaky bucket algorithm, the capacity (in MB) that bucket must hold so that no data is discarded is?.arrow_forwardEquation 1.1 gives a formula for the end-to-end delay of sending one packet of length L over N links of transmission rate R. Generalize this formula for sending P such packets back-to-back over the N links. Explainarrow_forward
- Suppose that Bob sends N back-to-back packets (numbered 1 to N) to Alice over two links (shown below) with the link between Bob's computer and the router having a transmission rate of R bits/sec (bps), and the link between the router and Alice's computer having a transmission rate of 2R bps. Bob Alice R bps 2R bps Router Find a formula, in terms of N, L and R, that characterizes the end-to-end delay of sending the N packets to Alice (i.e., the time needed for the last bit of the Nth packet to arrive at Alice since Bob starts transmitting the first bit of the first packet). Consider only the transmission delay that occurs in sending packets in your analysis. Show your work in detail. Also, using your formula, N = 800 packets, L find the end-to-end delay when 400 bits, and R = 100 bps.arrow_forwardSuppose one packet is transmitted from a source to a destination via a path of N links each with a rate of R. Then, the end to end transmission delay is NL/R. What is the transmission delay time for P packets if the source and destination are connected via M routers?arrow_forwardConsider 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 arearrow_forward
- 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 NICarrow_forwardConsider a broadcast channel with N nodes and a transmission rate of R bps. Suppose the broadcast channel uses polling (with an additional polling node) for multiple access. Suppose the amount of time from when a node completes transmission until the subsequent node is permitted to transmit (that is, the polling delay) is ?poll. Suppose that within a polling round, a given node is allowed to transmit at most Q bits. What is the maximum throughput of the broadcast channel?arrow_forwardA link has a transmission speed of 1010 bits/sec. It uses data packets of size 2000 bytes each. The efficiency of the stop-and-wait protocol in this setup is exactly 30%. Determine the value of the one-way propagation delay in milliseconds. Assume that the acknowledgement has negligibletransmission delay, and its propagation delay is the same as the data propagation delay. Consider the same transmission speed and packet size for Go back-N protocol with window size 8 and find the channel utilization.arrow_forward
- Consider the Go-Back-N (GBN) and Selective Repeat (SR) protocols with a sender window size of 4 and a sequence number range of 1024. For each of these protocols, describe what happens for the following cases: The first packet in the sender window size is lost before reaching the destination. All transmitted packets reached the destination except the third one. Only the first and last packets in the sender window size reached the destination. Only the ACKs of the first and last packets, in the sender window size, reached the destination.arrow_forwardA sender with window size (W=3) is connected to a selective repeat receiver by a link with bandwidth =106 bytes/second and propagation delay of 0.25 msec. The receiver sends Positive ACK for correctly received packets. For each packet sent, the sender sets a timer with time out value of 5 msec. On receiving an ack for a packet, the timer for that packet is cancelled. If the timer expires, that packet is retransmitted immediately. Assume that the sender sends packets 1, 2, and 3 (at t=0, packet size =1000 Bytes) and packet 2 is lost. NO other packet is lost. Under this scheme , at what time in msec would all the packets been received at the receiver.arrow_forwardA sender with window size (W=3) is connected to a go back N receiver by a link with bandwidth =106 bytes/second and propagation delay of 0.25 msec. The receiver sends Positive ACK for correctly received in order packets. For each packet sent, the sender sets a timer with time out value of 5 msec. On receiving an ack for that packet, the timer is cancelled. If the timer expires, that packet is retransmitted immediately. Assume that the sender sends packets 1, 2, and 3 (at t=0, packet size =1000 Bytes) and packet 2 is lost. NO other packet is lost. Under this scheme , at what time (in msec) would all the packets been received at the receiver.arrow_forward
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