Problem 1 (8/20): SubnettingProblem 2 (6/20): CIDRProblem 3 (8/20): DELAYSEECS122 – Communication Networks – Spring 2000Department of EECS – University of California at BerkeleyHomework Assignment 2Problem 1 (8/20): SubnettingFor the network below, indicate the routing tables that routers R1 and R2 and the configuration addresses that devices A and K must have. A B C D E F G R1 R2 1 2 3 J K L 1 2 3 Internet The network uses subnetting and the devices have the following addresses:A: 128.32.15.31/24; F: 128.32.19.12/26; K: 128.32.112.11/24R1(1): 128.32.15.33/24; R1(2): 128.32.112.8/26R2(3): 128.32.112.71/24If you use WORD, answer the questions on this form and mail it as an email attachment to wlr@eecs with the subject 122S01H2.If you use the pdf reader, answer the questions as a text email and send as indicated above. We need your anwers by February 12 at noon.Student Name: SID: emailProblem 2 (6/20): CIDRWe consider a simple network configuration problem. The networks N1-N4 have thefollowing sizes: N1: 3, N2: 20, N3: 10, N4: 50. Our network protocol uses 8-bitaddresses. Select CIDR prefixes for these networks and specify the routing tables atrouters R1 and R2. R1 R2 1 2 3 1 2 3 N4 N3 N1 N2Problem 3 (8/20): DELAYSIn the network below we assume that all the links are used at 80% of their capacity. Weadopt the rule of thumb we discussed in class that estimates the average queuing delay ateach buffer to be approximately 4 transmission times. The 1Mbps links are over copperand are 2km long. The 10Mbps links are over fiber and are 40 km long. The 10kbpslinks are over free space and are 5km long. Many network links are not shown. Thepackets are 500 bytes long, on average.Calculate the average delay from A to D and from B to C. A D B C 10kbps 10kbps 10Mbps 1Mbps 10Mbps 10Mbps 1Mbps
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