CISSP All-in-One Exam Guide, Seventh Edition by Shon Harris & Fernando Maymi

Author:Shon Harris & Fernando Maymi [Harris, Shon]
Language: eng
Format: azw3
Publisher: McGraw-Hill Education
Published: 2016-06-10T04:00:00+00:00

802.11e

This standard has provided QoS and support of multimedia traffic in wireless transmissions. Multimedia and other types of time-sensitive applications have a lower tolerance for delays in data transmission. QoS provides the capability to prioritize traffic and affords guaranteed delivery. This specification and its capabilities have opened the door to allow many different types of data to be transmitted over wireless connections.

802.11f

When a user moves around in a WLAN, her wireless device often needs to communicate with different APs. An AP can cover only a certain distance, and as the user moves out of the range of the first AP, another AP needs to pick up and maintain her signal to ensure she does not lose network connectivity. This is referred to as roaming, and for this to happen seamlessly, the APs need to communicate with each other. If the second AP must take over this user’s communication, it will need to be assured that this user has been properly authenticated and must know the necessary settings for this user’s connection. This means the first AP would need to be able to convey this information to the second AP. The conveying of this information between the different APs during roaming is what 802.11f deals with. It outlines how this information can be properly shared.

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