Under the assumption of no packets loss, how long will it take TCP to send an object that is 20KB over a link with a RTT of 400 milliseconds, a MSS of 2KB, and a rate of 10KB/second when: a. TCP is in slow start, CongWin = 1 and Threshold = 10: b. TCP is in congestion avoidance, CongWin = 5 and Threshold = 5

Under the assumption of no packets loss, how long will it take TCP to send an object that is 20KB over a link with a RTT of 400 milliseconds, a MSS of 2KB, and a rate of 10KB/second when: a. TCP is in slow start, CongWin = 1 and Threshold = 10: b. TCP is in congestion avoidance, CongWin = 5 and Threshold = 5

Operations Research : Applications and Algorithms

4th Edition

ISBN:9780534380588

Author:Wayne L. Winston

Publisher:Wayne L. Winston

Chapter20: Queuing Theory

Section20.4: The M/m/1/gd/∞/∞ Queuing System And The Queuing Formula L = Λw

Problem 7P

See similar textbooks

Similar questions

Consider the scenario below where 4 TCP senders are connected to 4 receivers. The servers transmit to the receiving hosts at the fastest rate possible (i.e., at the rate at which the bottleneck link between a server and its destination is operating at 100% utilization, and is fairly shared among the connections passing through that link). R =1 Gbps and Rc is 300 Mbps and Rs is 400 Mbps. And that all four senders have data to send, What is the minimum value of Re that will ensure that the connections to Host-1 and Host-2 are not bottlenecked at links with capacity Rc or Re?
Question 3 Consider a satellite channel running TCP/IP as shown in the figure below. Due to the long round trip time (RTT) and high bit error rate (BER) the conventional TCP congestion mechanism doesn’t work well in a satellite transmission system. 3.1 Assume traditional TCP/IP is used and that the congestion window of the TCP sender is 10k bytes, and it is in congestion avoidance (CA) state with the threshold variable equal to 8k bytes. Now, the sender receives 3 duplicated acknowledgements (ACKs). As a result, explain the effect on the congestion window size and the threshold.
Maximum end-end throughput (e). Consider the scenario below where 4 TCP senders are connected to 4 receivers. Servers 1 - 3 transmit to the receiving hosts at the fastest rate possible (i.e., at the rate at which the bottleneck link between a server and its destination is operating at 100% utilization, and is fairly shared among the connections passing through that link). Server 4 has nothing to send, so its sending rate is zero. Suppose that R = 1 Gbps, Rc is 300 Mbps and Rs is 400 Mbps. What is the TCP throughput achieved on each of the 3 sctive-sending connections? A. 4R B. Rc C. R/4…
This elementary problem begins to explore propagation delay andtransmission delay, two central concepts in data networking. Consider two hosts, Aand B, connected by a single link of rate R bps. Suppose that the two hosts areseparated by m meters, and suppose the propagation speed along the link is smeters/sec. Host A is to send a packet of size L bits to Host B.a. Express the propagation delay, ????? , in terms of m and s.b. Determine the transmission time of the packet, ?????? , in terms of L and R.c. Ignoring processing and queuing delays, obtain an expression for the end to-enddelay
A TCP PDU of length 40,513 octets (including the TCP header) is to be transmitted over a physical link between two nodes at 1,064,218,818 bps using 802.3 with an MTU of 826 octets. Assume a LLC-PDU has an overhead of 4 octets and that the IP-PDU has no options. i) How many bits are sent over the connection from the source to destination assuming only full frames are sent? ii) What is the effective data rate from the TCP-PDU point of view (to nearest integer)? iii) If the propagation time between the two nodes is 5 microseconds what is the line efficiency to 3 decimal places assuming stop and wait is used between the two nodes?
Why does the maximum packet lifetime have to be large enough to ensure that not only the packet but also its acknowledgments have disappeared? Give one potential disadvantage when Nagle's algorithm is used on a badly congested network. Give two examples of cases where TCP sends data-less packets on an established connection (which is not being torn down).
Assume that a bottleneck connection with a rate of R bps carries two TCP connections. In both cases, there is a big file that must be downloaded (in the same direction over the bottleneck link). The files are all transmitted at the same time How much data will TCP be able to transmit each connection?
This elementary problem begins to explore propagation delay andtransmission delay, two central concepts in data networking. Consider two hosts, Aand B, connected by a single link of rate R bps. Suppose that the two hosts areseparated by m meters, and suppose the propagation speed along the link is smeters/sec. Host A is to send a packet of size L bits to Host B. d. Suppose Host A begins to transmit the packet at time t=0 . At time t= ?????? ,where is the last bit of the packet? e. Suppose ????? is greater than ?????? . At time t= ??????, where is the first bit of the packet?f. Suppose ????? is less than ??????. At time t= ?????? , where is the first bit of thepacket?
Q) Consider a single TCP connection using a 10 Gbps link which does not buffer any data. Assume the TCP sender has a huge file to send to the receiver and the receiver’s receive buffer is much larger than the congestion window. We make the following simplifying assumptions:→ Each TCP segment size is 1500 bytes→ The RTT of the connection is 100 ms→ The TCP connection is always in congestion avoidance (ignore slow start) Calculate the loss rate of L using the given image as a formula to achieve 10 Gbps throughput, please specify all the calculations in detail.
1.4.12.2 End-to-end Delay. Consider again the network shown above. The links again have transmission rates of R1 = R2 = 100 Mbps (i.e., 100 x 106 bits per second), and each packet is 1 Mbit (106 bits) in size. Assume that the propagation delay is 1 msec per link. What is the end-to-end delay of a packet from when it first begins transmission at the sender, until it is received in full by the server at the end of the rightmost link. Assume store-and forward packet transmission. You can assume the queueing delay is zero. Answer choices: A. 2 x 106 msec b. 2.01 msec C. 1.1 msec D. 2.02 msec 1.4.12.3 Maximum Throughput. Consider again the network shown above. The links again have transmission rates of R1 = R2 = 100 Mbps Assume that the link R2 is fairly shared (as we've seen is done via TCP) between the two sessions. What is the maximum end-to-end throughput achieve by each session, assuming both sessions are sending at the maximum rate possible? Answer choices:…
2. Question; 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, and suppose the propagation speed along the link is s meters/sec. Host A is to send a packet of size L bits to Host B. Express the propagation delay, ????? , in terms of m and s. Determine the transmission time of the packet, ?????? , in terms of L and R. Ignoring processing and queuing delays, obtain an expression for the end-to-end delay. Suppose , ? = 2?10^8 ?/?, ? = 5 ????? and ? = 100???? Find the distance m so that ????? equals ??????.
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 1,200 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?