9.1.7 Practice Questions

Listen to exam instructions How many total channels are available for 802.11g wireless networks?

11

Which of the following are frequencies defined by 802.11 committees for wireless networking? (Select two.)

2.4 GHz 5.75 GHz

How many total channels (non-overlapping) are available for 802.11a wireless networks?

24

You are designing an update to your client's wireless network. The existing wireless network uses 802.11b equipment, which your client complains runs too slowly. She wants to upgrade the network to run up to 600 Mbps. Due to budget constraints, your client wants to upgrade only the wireless access points in the network this year. Next year, she will upgrade the wireless network boards in her users' workstations. She has also indicated that the system must continue to function during the transition period. Which 802.11 standard will work BEST in this situation?

802.11n

Which type of communication path-sharing technology do all 802.11 standards for wireless networking support?

CSMA/CA

Makes the transmitted bandwidth signal wider than the data stream needs.

DSSS

Which technologies are used by the 802.11ac standard to increase network bandwidth? (Select two.)

Eight MIMO radio streams 160 MHz bonded channels

Transfers data over a radio signal by switching channels at random within a larger frequency band.

FHSS

Which of the following is true of a wireless network SSID?

Groups wireless devices together into the same logical network.

Encodes data over a wireless network using non-overlapping channels.

OFDM

Your organization uses an 802.11b wireless network. Recently, other tenants installed the following equipment in your building: A wireless television distribution system running at 2.4 GHz. A wireless phone system running at 5.8 GHz. A wireless phone system running at 900 MHz. An 802.11a wireless network running in the 5.725 - 5.850 GHz frequency range. An 802.11j wireless network running in the 4.9 - 5.0 GHz frequency range. Since this equipment was installed, your wireless network has been experiencing significant interference. Which system is to blame?

The wireless TV system

Which wireless networking component is used to connect multiple APs together?

WDS