1
GATE CSE 2016 Set 2
MCQ (Single Correct Answer)
+1
-0.3
In an Ethernet local area network, which one of the following statements is TRUE?
A
A station stops to sense the channel once it starts transmitting a frame.
B
The purpose of the jamming signal is to pad the frames that are smaller than the minimum frame size.
C
A station continues to transmit the packet even after the collision is detected.
D
The exponential backoff mechanism reduces the probability of collision on retransmissions.
2
GATE CSE 2016 Set 2
MCQ (Single Correct Answer)
+2
-0.6
For the IEEE 802.11 MAC protocol for wireless communication, which of the following statements is/are TRUE?


I. At least three non-overlapping channels are available for transmissions.
II. The RTS-CTS mechanism is used for collision detection.
III. Unicast frames are ACKed.

A
All I, II, and III
B
I and III only
C
II and III only
D
II only
3
GATE CSE 2016 Set 2
Numerical
+2
-0
A network has a data transmission bandwidth of 20 × 106 bits per second. It uses CSMA/CD in the MAC layer. The maximum signal propagation time from one node to another node is 40 microseconds. The minimum size of a frame in the network is __________ bytes.
Your input ____
4
GATE CSE 2016 Set 2
Numerical
+2
-0
Consider a 128 × 103 bits/second satellite communication link with one way propagation delay of 150 milliseconds. Selective retransmission (repeat) protocol is used on this link to send data with a frame size of 1 kilobyte. Neglect the transmission time of acknowledgement. The minimum number of bits required for the sequence number field to achieve 100% utilization is _________.
Your input ____
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