CS601 Final Term Solved MCQs Set 3 by Junaid

Q1. Ethernet Address is of-----------------bytes

•  4
•  6
•  8
•  12

Q2. In Pure ALOHA, the vulnerable time is ------------- the frame transmission time.

 Same as ·  Two times ·  Three times ·  Four times

Q3. ___________ was used as a medium in 10 Base-T

•  Thick coaxial Cable
•  Think coaxial Cable
•  Twisted Pair Cable
•  Two Mode For Cable

Q4. When data are transmitted from device A to device B, the header from A’s layer 4 is read by B’s __________ layer.

•  physical
•  transport
•  application

Q5. In _______encoding, we use three levels: positive, zero, and negative.

•  polar
•  nonpolar
•  mmultilevel
•  bipolar

Q6. A periodic signal completes one cycle in 0.001 s. What is the frequency?

•  1 Hz
•  100 Hz
•  1 KHz
•  1 MHz

Q7. There are _________ basic modes for the propagation of light in fiber-optic cables.

•  3
•  4
•  5
•  2

Q8. A parabolic dish antenna is a(n) ______________ antenna.

•  Omnidirectional
•  Bidirectional
•  Horn
•  Unidirectional

Q9. Zero crossing bandwidth is also called as equivalent noise bandwidth.

•  True
•  False

Q10. During the transmission, transmitting device produces a high frequency signal which acts as a basis for the transmission. This base signal is called ________.

•  Analog signal
•  Digital signal Not Confirm
•  Modulated signal
•  Carrier signal

Q11. There are _________________ types of serial transmission:

•  1
•  2
•  3
•  4

Q12. Synchronous transmission have _____________.

•  a start bit
•  a stop bit
•  gaps between bytes

Q13. Using ___________ encoding scheme in digital transmission, we represent 0 by zero voltage level and represent 1 by any positive voltage level.

 Polar  AMI  Bipolar  Unipolar

Q14. _______________ is the formula for finding number of bits sent per level.

•  Log L
•  Log2
•  Log2*2
•  Log2 L

Q15. Which of the following is an example of ITU-T modem standards:?

•  T-series
•  X-series
•  N-series
•  V-series

Q16.  26.6 Kbps

•  33.6 Kbps
•  36.6 Kbps
•  46.6 Kbps

Q16. In ___________ each station is forced to send a frame only at beginning of time slot

•  Pure ALOHA
•  Slotted ALOHA
•  Fragmented ALOHA

Q17. In ___________ each station sends a frame whenever it has a frame to send

•  Pure ALOHA
•  Slotted ALOHA
•  Fragmented ALOHA

Q18. The data rate of a T-1 line is ___________.

•  1.544 Gbps
•  2.544 Mbps
•  1.544 Kbps
•  1.544 Mbps

Q19. Circuit switched networks have __________ efficiency but __________ delay compared to the packet switched networks.

•  high, minimal