Exam 6: Wireless Lans I

MIMO ________.

In ________,when a wireless host wishes to send,it first sends a message to the wireless access point asking for permission to send.When the access point sends back a response,the host sending the original message may transmit.All other hosts must wait.

If the signal strength from an omnidirectional radio source is 100 mW at 10 meters,how strong will it be at 30 meters,ignoring absorptive attenuation?

The downside of unlicensed bands is potential ________

What propagation problem is especially bad in moist air?

If an 802.11n client tries to use an 802.11ac access point,________.

To transmit data very rapidly,you would want a ________ channel.

A single access point,and the set of hosts it serves,is called a(n)________.

________ is a technique for preventing two wireless stations from interfering with each other by transmitting at the same time.

Individual throughput for users of an access point ________.

Access points in the same ESS communicate via ________.

What propagation problem becomes worse as frequency increases?

CSMA/CA+ACK is ________.

Wi-Fi standards use unlicensed bands for ________

Access points take ________ from wireless devices and send them on to devices on the wired LAN.

Multipath interference is mitigated through ________.

The 802.11 standard has two mechanisms for media access control.Of the two,________ is mandatory.

As your wireless client travels away from an access point,________.

What is the main promise of 802.11ax over 802.11ac?

Beamforming can allow an access point to ________.