CS601 Final Term Solved MCQs with References by Moaaz

CS601-Data Communication · Latest Solved MCQs from Final term Papers · May 26,2011

Lectures 23-45 Moaaz Siddiq Latest Mcqs

FINAL TERM EXAMINATION

Spring 2011

Q1. The inversion of the level at 1 bit is called as __________

1. NRZ-L
2. NRZ-I Page 73
3. RZ

Correct answer: NRZ-I Page 73

Q2. In selective-reject ARQ, only the specific damaged or lost frame is_____________.

1. Retransmitted (Page 200)
2. Forwarded
3. Selected
4. Rejected

Correct answer: Retransmitted (Page 200)

Q3.

1. 1024 Page 205
2. 256
3. 128
4. 512

Correct answer: 1024 Page 205

Q4. Which of the following sublyer, resolves the contention for the shared media

1. MAC (Page 219)
2. LLC
3. Physical

Correct answer: MAC (Page 219)

Q5. Like 10 Base 5, 10 Base 2 is a _________ topology LAN

1. Ring
2. Mesh
3. Star
4. Bus (Page 227)

Correct answer: Bus (Page 227)

Q6. At the CRC generator, __________ added to the data unit after the division process

1. 0s are (Page 176)
2. 1s are
3. The polynomial
4. The CRC remainder is

Correct answer: 0s are (Page 176)

Q7. Flow control is needed to prevent ___________.

1. Bit errors
2. Overflow of the sender buffer
3. Overflow of the receiver buffer (Page 46)
4. Collision between sender and receiver

Correct answer: Overflow of the receiver buffer (Page 46)

Q8.

1. True (Page 205)
2. False

Correct answer: True (Page 205)

Q9. In 56K Modems Max Uploading speed is ______ bytes and downloading speed is ______ byte.

Ø 40K, 56K

Ø 33.6K, 56K (Page 117)

Ø 56K, 33.6K Ø None of given

Q10. If db is amplified then attenuation is ------------------

Ø Positive (Page 142)

Ø Negative Ø Zero Ø None of the above

Q11. Amplifiers are used to __________the signal to heat.

Ø Amplify (Page 142)

Ø Rectify Ø Testify Ø Nullify

Q12. _________requires the maximum number of I/O ports.

Ø Bus Ø Star

Ø Mesh (Page 29)

Ø Ring

Q13. There are ________ basic categories of multiplexing.

Ø 3 (Page 148)

Ø 4 Ø 2 Ø 5

Q14. In _____________ transmission, bits are transmitted over a single wire, one at a time.

Ø Asynchronous serial Ø Synchronous serial

Ø Parallel (Page 98)

Ø Asynchronous & Synchronous serial

Q15. In_____________ transmission, bits are transmitted over their own wires

Ø Asynchronous serial Ø Synchronous serial

Ø Parallel

Ø Asynchronous & Synchronous serial

Q16. EIA 232 allows for a maximum bit rate of __________Kbps.

Ø 40 Ø 30

Ø 20 (Page 104)

Ø 10

Q17. In CRC the quotient at the sender _____________

Ø Becomes the dividend at the receiver Ø Becomes the divisor at the receiver

Ø Is discarded

Ø Is the remainder

Q18. In line discipline after the data transmission, the sending system finishes with an _____________ frame

Ø EOT (Page 189)

Ø EKT Ø ENT Ø ESP