sample_midterm_solution

sample_midterm_solution - B oston U niversity ECE D...

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Boston University ECE Department Fall 2008 Student ID 0 Introduction to Computer Networking (BC 441) Exam L (11/13/2008) Instructions o The exam consists of four questions . The duration of the exam is t hour and 45 minutes o The maximum grade is 100 points . Write your solutions in the spaces provided on the test sheet (Use a pencil) . All material is allowed, except for communication devices. Material sharing is not permitted. Good Luck!!! Name (First, Last) 1
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z. CircIe the correct answer. I t I I ' tl A 1 t t,acn correcr answer ts wonn ) points, and each wrong answer is worth -2 points. Not circling any answer is worth 0 point. (a) Both HTTP/l.0 and HTTP/I .l arc implemented on top of TCP. Farse @ \/ (b) The number of bits propagating on a link is always smaller or equal to the bandwidth- delay product of that link. False @) \J (c) You write the server side of a propnetary application-layer protocol in Java. Within your program, you use the following command to create a welcoming TCP socket: S erverSocket welcomeS ocket : new ServerSocket(7 8 9) ; Is this command correct? f.i, Yes V?q i> ' ,., of .,rl{o'2, t ';;;""n"*ifi"rii'11',rq 4'^ o +o lP;s n're ca,l,'Lci' ui/, - -L-n** ',fno , ),0 /tc? . ,,/ kr. TT P o /TC( ,'t,(?C, ?Ifrnu, I*lm Q, / TLy .1tt? , Dtv' t, ftcb uoP . hrlo PTp - /"&fr lP segment inside a network always results in a til ,,,4 6"f,ta^s^n"i
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Question 2 (30 points) The Federal government has set up a new website to let citizens elect the next president's dog. The URL is http : / /www. choosedog.gov and its IP address is 101.102.103.104. The IP address of the authoritative name server for that web site is 101.102.103.r20. Suppose
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sample_midterm_solution - B oston U niversity ECE D...

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