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Question 30 - CWAP-404 discussion

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Where would you look in a packet trace file to identify the configured Minimum Basic Rate (MBR) of a BSS?

A.
Supported Rates & Extended Supported Rates elements in a Beacon frame
Answers
A.
Supported Rates & Extended Supported Rates elements in a Beacon frame
B.
In the MBR Action frame
Answers
B.
In the MBR Action frame
C.
In the MBR Information Element in an Association Response frame
Answers
C.
In the MBR Information Element in an Association Response frame
D.
In the Minimum Basic Rate Element in a Beacon frame
Answers
D.
In the Minimum Basic Rate Element in a Beacon frame
Suggested answer: A

Explanation:

The configured Minimum Basic Rate (MBR) of a BSS can be identified by looking at the Supported Rates and Extended Supported Rates elements in a Beacon frame. A Beacon frame is a type of management frame that is transmitted by an AP to advertise its presence and capabilities to potential clients. A Beacon frame contains various information elements (IEs) that provide details about the BSS configuration and operation. The Supported Rates and Extended Supported Rates IEs list the data rates that are supported by the AP for data transmission. The MBR is the lowest data rate among these supported rates that is required for all clients to join and communicate with the BSS. The MBR is usually marked with a flag bit in these IEs to indicate its mandatory status. The other options are not correct, as they do not exist or do not indicate the MBR of a BSS.Reference:[Wireless Analysis Professional Study Guide CWAP-404], Chapter 5: 802.11 MAC Sublayer, page 123-124

asked 16/09/2024
Luis Maciel
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