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GATE 2022: Computer Network Quiz 5
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Question 1
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.
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.
Question 2
Which of the following is not 802.11 protocol?
Question 3
Consider that 15 machines need to be connected in a LAN using 8-port Ethernet switches. Assume that these switches do not have any separate uplink ports. The minimum number of switches needed is__________.
Question 4
Assume there are 50 nodes are connected to a 500-meter length of cable. Each node can transmit 25 frames per second and average length of frame is 2000 bits. Transmission rate at each node is 10 Mbps. The efficiency of this protocol is ________ (in %).
Question 5
Consider a 10 Mbps Ethernet LAN that has stations attached to a 2.5 km long coaxial cable. Given that the transmission speed is 2.3 x 108 m/sec, the packet size is 128 bytes out of which 30 bytes are overhead, find the effective transmission rate at which the network can send data.
Question 6
A network has a data transmission bandwidth of 
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.
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. - 172 attempts
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Nov 3GATE & PSU CS
