homework3 - Dept. of Computer Science and Engineering HKUST...

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Unformatted text preview: Dept. of Computer Science and Engineering HKUST CSIT 561 Computer Networks: An Internet Perspective Fall Semester 2009 Homework 3 LU, Lu 09960007 Due Date: Sunday 29 Nov. 2009 11:59 pm Submission Instructions: Please submit your solutions electronically through the LMES website http://lmes2.ust.hk . Please go the CSIT 561 website and look under Assignments. You will see Homework 1 listed there. Please submit your work either in PDF format (preferred), or MS Word format. Problems: 1 . In Figure 1.1, consider the path information that reaches stub networks W, X, and Y. Based on the information available at W and X, what are their respective views of the network topology? Justify your answer. The topology view at Y is shown in Figure 1.2. CSIT 561 (Fall 2009) Homework 3 1 W A B C X Y Customer network Provider network Figure 1.1 A simple BGP scenario W A C X Y Figure 1.2 Topology view at Y Dept. of Computer Science and Engineering HKUST Answer 2 . Suppose three active nodes (A, B, and C) are competing for access to a channel using slotted ALOHA. Assume each node has an infinite number of packets to send. Each node slotted ALOHA....
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homework3 - Dept. of Computer Science and Engineering HKUST...

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