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Question 43 - CWAP-404 discussion

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Which one of the statements regarding the Frame Control field in an 802.11 MAC header is true?

A.
Only Control frames have a Frame Control field
Answers
A.
Only Control frames have a Frame Control field
B.
The Frame Control field is used to communicate the duration value
Answers
B.
The Frame Control field is used to communicate the duration value
C.
The Frame Control field contains subfields, and soma in 1-bit flags
Answers
C.
The Frame Control field contains subfields, and soma in 1-bit flags
D.
The Frame Control field is always set to 0
Answers
D.
The Frame Control field is always set to 0
Suggested answer: C

Explanation:

The statement that the Frame Control field contains subfields, and some 1-bit flags is true. The Frame Control field is a 2-byte field in the MAC header that contains information about the type, subtype, and characteristics of a frame. The Frame Control field is divided into several subfields, each with a specific function and length. Some of these subfields are 1-bit flags, which can be set to 0 or 1 to indicate a certain condition or status. For example, the To DS and From DS subfields are 1-bit flags that indicate whether a frame is destined for or originated from the DS (Distribution System). The other statements are not true, as they do not describe the Frame Control field correctly. All types of frames (management, control, and data) have a Frame Control field, not just control frames. The Frame Control field is not used to communicate the duration value, which is a separate field in the MAC header. The Frame Control field is not always set to 0, as it varies depending on the type, subtype, and characteristics of each frame.Reference:[Wireless Analysis Professional Study Guide CWAP-404], Chapter 5: 802.11 MAC Sublayer, page 113-114

asked 16/09/2024
RAHULREDDY BIRADAVOLU
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