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University of Waterloo ECE 358 lcblcblcb
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ECE 358 Final Exam., F’2016 Dept. of Electrical and Computer Engineering ECE 358 – Computer Networks Instructor: Sagar Naik Exam. Date and Time: Dec. 19, 2016, 12:30 PM—3:00 PM Room(s): MC ... 2034, 2035 Instructions • This is a closed book, 2.5 hour exam. • Should there be a need, make reasonable assumptions and proceed. • All acronyms have their standard expansions as explained in class. • Unless otherwise stated, all network layer questions are about IPv4. • You may use a calculator. • For full credit, make your answers accurate, complete, and legible. ECE 358 Final Exam/ Fall 2016 Page 2 of 13 You may continue writing on the reverse side of this page, except page 1. Q1. [5 marks] Identify the best matching pairs between Column A and Column B. Write your answers in the Answer column. Column A Answer Column B A This solves the three-node instability problem 1 This is used by AS-internal routers to drop IP packets. B Initial Sequence Number 2 This is used by BGP routers to enable an AS to be not used as a transit AS. C Import policy 3 Routers use it to find the next hop for IP packets. D Export policy 4 Hosts run the DHCP protocol to get it. E Time To Live 5 It stops duplicate data from being delivered. F Destination address in an IP packet 6 Hosts execute the Switch Learning algorithm to get this. G IP address of a DNS server 7 Split-horizon with poisoned reverse H Area 8 It prevents TCP segments in an old connection from being accepted in a new one. I Hop count 9 This is used by BGP routers to reject paths to some destination networks. J Scaling factor 10 OSPF protocol K 11 This changes when an IP packet moves from router to router. L 12 This concept, found in OPSF, is not there in RIP. M 13 This is used to enlarge the receive window size in TCP N 14 This is used by RIP. [Show More]
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