course: Data communication and communication Networks Q: Compare the different TCP variants (Tahoe, Reno, New Reno, and SACK) for congestion control and congestion avoidance mechanisms highlighting advantages and disadvantages. You are also required to discuss the fairness of their congestion control mechanisms using Raj Jain’s Fairness Index.

course: Data communication and communication Networks Q: Compare the different TCP variants (Tahoe, Reno, New Reno, and SACK) for congestion control and congestion avoidance mechanisms highlighting advantages and disadvantages. You are also required to discuss the fairness of their congestion control mechanisms using Raj Jain’s Fairness Index.

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

See similar textbooks

Similar questions

6.4-3 Network- and Link-layer addressing: an end-to-end-scenario (1c). Consider the network shown below. The IP and MAC addresses are shown for hosts A, B, C and D, as well as for the router's interfaces. Consider an IP datagram being sent from node B to node D. Match the source/destination network- or link-layer address at the location (5)by choosing a value from the pulldown list. [Note: You can find more examples of problems similar to this here.]
A 1-km-long, 10-Mbps CSMA/CD LAN (i.e., Classic Ethernet)has a propagation speed of 200 m/μsec (i.e., how fast the radio signal moves on the link). Thereare no repeaters in this system. Data frames are 512 bits long, including 480 bits of payload (i.e.,effective data) and 32 bits of overhead (e.g., header, checksum, and other overhead fields). Everydata frame should be confirmed by a 64-bit ACK frame. We assume the sender needs to use onecontention slot to seize the channel before transmitting the data frame, and the receiver needsto use one contention slot to seize the channel before transmitting the ACK frame. Answer thefollowing questions: a. What is the minimum length of a contention slot in μsec? b. What is the effective data rate for the sender to send one data frame? Assume that there areno collisions. Show the calculation c. What would be the impact on the total delay and the effective data rate if we used a longerdata payload size in the data frame? Given one application…
give proper solution for both (A) and (B) give proper explaination subject networking (a) The purpose of the OSI model is to show how to facilitate communication between different systems without requiring changes to the logic of the underlying hardware and software? In contrast to TCP/IP model this model is not practically implemented and TCP is practical. Why? Answer with valid reasons. (b) Nowadays, the “store-and-forward network” technique is not using in general communications, why? Also describe it’s working.
Figure has been attached A) List down the functionality of each layer of a OSI model.( Do not write book type documents.only list the responsible functions. For instance: Data link layer: 1. Framing, 2. Error control,3…… etc.)B) According to the given figure, assume that, PC0 wants to send a message to PC4. If the distancebetween the two points is 22,000 km, 3.2-kbyte message sends in 2.4 x 100000000 mls speedthrough cable and the transmission link has 1.5 Gbps Bandwidth. When the message arrives atRouters ,a) Router0 already has 4 packets to process in the queue and each will need 2ms.b) Router1 has no packets in the queue, but if it had then would require 3ms to process.c) Router2 already has 5 packets to process in the queue and each will need 1ms.Calculate the total time to send the message from PC0 to PC4
compare connectionless (UDP) and connection-oriented(TCP) communication for distributed computing. Use human interactions to differentiate between the two types of communications. In your response, include real world scenario where one is advantageous over the other
Computer Science a. Explain with illustrations the hidden terminal and the exposed terminal problems in wireless networks, using four nodes A, B, C, and D. b. How can RTS/CTS help with removal of hidden terminal problem and exposed terminal problems? c. Does RTS/CTS message ensure that data frames from different nodes never collide? d. Suppose that the wireless links are vey noisy and different nodes communicate with each other via TCP segments, so that TCP segments may be lost/dropped due to bit errors. Discuss whether TCP could be a good protocol used in this scenario. To ensure mobility in wireless IP networks the Mobile IP scheme uses the concepts of Home Agent and Foreign Agent. Explain briefly with illustration how this works. By virtue of the redirections, the connection process is slow. Suggest a mechanism to improve this.
Consider the throughput example. Now suppose that there are 4 client-server pairs. Denote Rs1, Rs2, Rs3,Rs4 ,Rc1 ,Rc2 ,Rc3, Rc4 and R for the rates of the server links, client links, and network link. Assume all other links have abundant capacity and that there is no other traffic in the network besides the traffic generated by the 4 client-server pairs. Question: Assume that for i = {1,2,3,4}, Rsi = Rci = R , assume that all routers have infinite buffercapacity, meaning that packets are never dropped and are eventually forwarded by a router. Whatis the throughput for the Client Server pair 1? What is the throughput for Client Server pair 3?
Internet service providers are constantly moving traffic from one site to another. This requires them to keep a certain standard. Explain the usability of this standard and why is it used so often. Explain the role of an Asynchronous Transfer Mode in guaranteeing quality of service in certain transmissions. Suppose that the network’s bandwidth is unstable, and it is always fluctuating. Explain how queueing and its different mechanisms help solve this problem.
Answer the questions below with reference to Data Link Layer (max 250 words): i) A local Area Network (LAN) Medium Access Control (MAC) protocol aims to achieve fair and efficient access to a LAN transmission medium. Characterise the distinction between authorisation based (“taking turns”) and contention based (random access) MAC layer protocols and discuss the suitability of each protocol in light traffic and heavy traffic networks in terms of fairness and efficiency of access. ii) In CSMA/CD, after the fifth collision, what is the probability that a node chooses k=4. The result k=4 corresponds to a delay of how many seconds on a 10Mbps Ethernet?
In packet switching, the Datagram approach is considered a faster solution to increase decrease the traffic delay, yet, unreliable and prone to a high volume of data loss in comparison to the Virtual - circuit approach. Explain the mechanisms of both approaches in a way to justify the above statement. Support your with graphical demonstrations. answer
q no 5: In the above network diagram, IP and MAC addresses are given for network nodes. Suppose Host1 (Shahid) sends a datagram to Host2 (Khalid). What IP and MAC addresses (source and destination) will be written in IP and Data link layer headers respectively, for the following intermediate points from Host1 to Host2? Host1 to Router1 (R1) Router1 to Router2 (R2) Router2 to Host2
Not sure how to approach this exercise on classful IP addressing