Question: The binary number 01101101 is odd parity (A) True (B) False 7. One way of detecting errors is to transmit data as a block of

The binary number 01101101 is odd parity (A) True (B) False 7. One way of detecting errors is to transmit data as a block of n rows of k bits per row and add parity bits to each row and each column. The bitin the lower-right corner is a parity bit that checks its row and its column. Will this scheme detect burst errors of length 4? (A) TRUE (8) FALSE 8. In the Go-back-n acknowledgement protocol the timeout interval should be shorter than the maximum time an ack signal is received by the sender. (A) True (8) False 9. 10. In Selective repeat acknowledgement protocol frames can be received out of sequence. (A) True (B) False 11. Go-back-n is a more efficient protocol than Selective repeat because there will be less waste frames in the presence of errors (A) True (B) False 12. In the simplex stop-and-wait protocol an error may cause multiple retries of the data. (A) True (B) False 13. A noiseless 16khz channel is sampled once every 1ms with an 8 bit sample. What is the datarate? (A) 4Kbps (B) 8kbps (C) 16kpbs (D) none of the above 14. A particular data channel has a signal to noise ratio of 20db and a bandwidth of 20Khz. What is Shannons maximum data rate over this channel? (A) 88Khz (B) 20Khz (C) 10khz (D) none of the above 15. A basic OC-1 SONET frame will transmit 810 bytes every 125 usec. (A) TRUE (B) FALSE

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4. What are the facts that need to be considered? What assumptions are you making?

2. Who are the stakeholders, and how would they define the problem? What are the values of greatest importance to these stakeholders?