450_SampleQuestions_4

450_SampleQuestions_4 - EE 450 Sample Questions 4 Summer 09...

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1 EE 450 Sample Questions 4 Summer ’09 ● Nazarian 1. (3 points) Assuming even parity find the parity bit and the code word for each of the following data units. a. 1001011 b. 0001100 c. 1000000 d. 1110111 2. (20 points) Given the dataword 10100111 and the generator 10111. a. Show the generation of the codeword at the sender site (using binary division) b. Assume the channel is reliable and the codeword is received by the receiver with no error. Show the checking of the codeword at the receiver site. 3. (25 points) Review questions. a. Briefly describe the services provided by the Data Link layer. b. Compare and contrast flow control and error control. c. Explain the reason for moving from Stop & Wait ARQ to Go-Back-N ARQ protocol. d. Compare and contrast Go-Back-N ARQ protocol with Selective Repeat ARQ. e. Which ARQ protocols utilize pipelining? f. In CRC, show the relationship between the following entities: 1) the size (i.e., the number of bits) of the dataword and the size of the codeword 2) the size of the generator
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This note was uploaded on 02/09/2012 for the course EE 450 taught by Professor Zahid during the Spring '06 term at USC.

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450_SampleQuestions_4 - EE 450 Sample Questions 4 Summer 09...

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