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exam1_solution - Exam 1 ECE3076 Computer Networks Spring...

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- 1 - Exam 1 ECE3076 Computer Networks Spring 2008 Name: SOLUTION Section: 4 problems Total points: 50 Time: 80 minutes Be a smart exam taker: do what you know first, and show work.
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- 2 - Problem 1 Problem 2 Problem 3 Problem 4 Total 1. (15pts) Choose correct answers from all 4 choices. For a certain questions, there may be more than one correct answer. (a) (3pts) An advantage of circuit switching over packet switching is that: (i) It can use network resources more efficiently (ii) It can accommodate more connections/flows for the same amount of network resources (iii) It can provide strict quality of service assurances to connections accepted to be served by the network X (iv) It is more suitable for supporting bursty traffic. (b) (3pts) An application (e.g. HTTP) running on two different hosts uses the following as the access points to communicate (i) Ports X (ii) Network routers (iii) IP addresses X (iv) Header (c) (3pts) According to the protocol-layer model, the actual signal (i.e., bits, 1 and 0) are transmitted through (i) Physical layer X (ii) Network layer (iii) Transport layer (iv) Application layer (d) (3pts) Protocol such as DNS uses UDP as the next layer protocol which (i) Provides reliable service similar to what TCP can do (ii) Provides real-time service X (ii) Uses port 53 X (iii) Uses port 80 (e) (3points) Application architectures include (i) Client-server architecture X (ii) Network-core architecture (iii) Network of networks architecture (iv) Peer-to-peer architecture X
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- 3 - 2. (15pts) Provide answers to the following questions.
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exam1_solution - Exam 1 ECE3076 Computer Networks Spring...

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