6. Networks & Security

Wireless Systems — Quiz

Test your understanding of wireless systems with 5 practice questions.

Practice Questions

Question 1

Which mechanism in IEEE 802.11’s Distributed Coordination Function helps mitigate the hidden terminal problem?

Question 2

Which scenario best exemplifies the exposed terminal problem in a wireless network?

Question 3

What is the maximum Doppler shift experienced by a user moving at 36\,km/h at a carrier frequency of 2.4\,GHz?

Question 4

What is the area of a hexagonal cell with radius 1\,km?

Question 5

Assuming a mobile user travels straight through the center of a circular cell of radius 1\,km at 60\,km/h, what is the crossing time?