Worksheetswsn2
Total questions: 10
Worksheet time: 20mins
The technique that makes possible the task of listening and talking in communication system is called ________
Simplexing
Duplexing
Modulating
Multiple access technique
Frequency division duplexing provides ____ distinct bands of frequencies for _____ user.
Two, two
Two, one
One, two
Two ,many
Which multiple access technique is used by IEEE 802.11 standard for wireless LAN?
CDMA
CSMA/CA
Aloha
Non of the mentioned
Which of the following statements does not describe the S-MAC protocol correctly?
Energy dissipation is reduced in S-MAC through idle listening
Implementation of the algorithm is simple
The sleep and listen vary constantly based on the network traffic conditions
all of the mentioned
Why is implementation of MAC protocols important in context of WSNs?
Supports multi-hop communication, alongside single-hop
Special design for energy-constrained environments
Support for Ad-hoc node deployment
all of the mentioned
Which is not a cause for undesired energy wastage in WSNs?
Sensing of events
Idle listening
Overhearing in case of densely deployed sensor networks
Collision of transmitted frames
What is vulnerable time in Pure Aloha?
twice the frame time
half the frame time
two third of the frame time
Exactly the frame time
The medium access control (MAC) is a sublayer Of ___________
data link layer
network layer
physical layer
application layer
Carrier Sense Multiple Access (CSMA) is based on medium called ___________
Listen and talk
Listen before sending
Sense before transmit
Sense before Collision
Mostly ________ is used in wireless LAN.
time division multiplexing
orthogonal frequency division multiplexing
space division multiplexing
none of the mentioned
