1.4-2 Maximum end-end throughput. Consider the scenario shown below, with 10 different servers (four shown) connected to 10 different clients over ten three-hop paths. The pairs share a common middle hop with a transmission capacity of R = 200 Mbps. Each link from a server has to the shared link has a transmission capacity of Rs = 25 Mbps. Each link from the shared middle link to a client has a transmission capacity of Rc = 50 Mbps. Server-1 Host-1 Server-2 Rs Rc Rc R Server-10 Rs Rc ... www Rc Host-10 Host-2 What is the maximum achievable end-end throughput (in Mbps, give an integer value) for each of ten client-to-server pairs, assuming that the middle link is fairly shared and all servers are trying to send at their maximum rate?

1.4-2 Maximum end-end throughput. Consider the scenario shown below, with 10 different servers (four shown) connected to 10 different clients over ten three-hop paths. The pairs share a common middle hop with a transmission capacity of R = 200 Mbps. Each link from a server has to the shared link has a transmission capacity of Rs = 25 Mbps. Each link from the shared middle link to a client has a transmission capacity of Rc = 50 Mbps. Server-1 Host-1 Server-2 Rs Rc Rc R Server-10 Rs Rc ... www Rc Host-10 Host-2 What is the maximum achievable end-end throughput (in Mbps, give an integer value) for each of ten client-to-server pairs, assuming that the middle link is fairly shared and all servers are trying to send at their maximum rate?

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Given what we know about transmission delay and the following: A web client and a web server separated by one intermediary router. • Each link carries data at 1Mbps with an MTU of 8192 bytes • Each link is 1000 km long with a propagation speed of 250000 km/s • Zero processing and queueing delays • Connection management packets (packets used for opening a connection, confirming a connection and acknowledging receipt of information) contain no data and all packets have 125 bytes of overhead on top of any data they may contain. • The web client makes an HTTP request to the server that is 250 bytes long. • The requested data is 4 kilobytes in size with 500 bytes of overhead for the HTTP status and headers What is the RTT to open the connection? а. b. How long would it take for a web client to complete the request? You can ignore any time needed to close the connection.
9. Consider the given scenario where Host A wants to send a file to host B. Calculate the end to end delay between Host A and Host B, when the propagation speed at each link is approximately 2x108 m/sec, and the processing and queuing delays at the router are 10 msec and 25 msec, respectively, when: (a) File size is 1500 bytes and only one packet is sent. 4 (b) File size is 6000 bytes and four packets are sent (1500 bytes in each packet). HOST A R1-200kbps D1=15km Router 1 R2=5Mbps D2=100km HOST B
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Consider the throughput example presented in the figure below. 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:derive a general expression for throughput for the Client Server pair 1, in terms of Rsi, ,Rciand R.
Please provide the justification on the answers. why you decide to use the formula you applying to part b.
Consider the throughput example presented in the figure below. 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. Furthermore, assume that all routers have infinite buffer capacity, meaning that packets are never dropped and are eventually forwarded by a router. What is the throughput for the Client Server pair 1? What is the throughput for Client Server pair 3?