Chapter 3 Review Questions

What is the maximum data rate of an HR/DSSS PHY transmission?

• 1

• 2

• 5.5

• 11

In what frequency band does the VHT PHY operate?

• 2.4 GHz

• 5 GHz

• 60 GHz

• 700 MHz

What PHY is designed to use available frequencies in the television space that is available for use?

• VHT

• S1G

• HR/DSSS

• HT

What PHY is likely to be most used by low output power, long-range devices that require long battery life?

• DSSS

• HR/DSSS

• S1G

• VHT

How is the 802.11ah amendment most likely to be used?

• Connecting laptops

• Connecting desktops

• Connecting high-speed video devices

• Connecting IoT devices

What is the maximum number of spatial streams supported by an 802.11n (HT) PHY?

• 1

• 2

• 3

• 4

What is the maximum channel width supported by an 802.11ac (VHT) PHY?

• 20 MHz

• 40 MHz

• 16 MHz

• 160 MHz

CCI is an AP-only problem?

• True

• False

Which one of the following is not a state in the 802.11 state machine?

• Unauthenticated/Unassociated

• Authenticated/Unassociated

• Authenticated/Associated

• Unauthenticated/Associated

What interframe space is used before an ACK frame?

• SIFS

• DIFS

• RIFS

• PIFS