Exam 6: Wireless Lans I

The 802.11 standard has two mechanisms for media access control.One of two mechanisms is mandatory; it is ________.

A channel has more bandwidth than is necessary given data transmission speeds requirements in ________ transmission.

802.11 standards are being developed to work in the ________ unlicensed band.

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

An extended service set (ESS)is a group of BSSs that ________.

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.

At 10 meters,a signal has a strength of 100 mW.About how strong will it be at 40 meters?

Wireless network standards are ________ standards.

To transmit very rapidly in RADIO,you need ________.

If two products both comply with 802.11 ac,they should have close to the same performance.

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

The most serious problem with wireless transmission in WLANs is ________.

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

Spread spectrum transmission is used in WLANs for ________.

In unlicensed bands,________.

Mesh networking in 802.11 is likely to use ________.

The 802.11 standard for mesh networking is ________.

To connect to an access point,you must know its ________.

We use the terms Wi-Fi and ________ interchangeably in this book.

If more users move to an access point,this decreases ________.