Final answer:
The next component in an 802.11 MAC frame after FC, DUR, ADD1, ADD2, ADD3 is the Sequence Control (SEQ). It plays a critical role in the proper sequencing of data packets.
The correct answer is A) Sequence Control (SEQ).
Step-by-step explanation:
In an 802.11 MAC frame, following the fields FC (Frame Control), DUR (Duration/ID), ADD1 (Address 1), ADD2 (Address 2), and ADD3 (Address 3), the next component would be the Sequence Control (SEQ).
The complete frame ordering looks something like this: FC -- DUR -- ADD1 -- ADD2 -- ADD3 -- SEQ -- ADD4 (if present) -- Data -- FCS (Frame Check Sequence). SEQ is crucial because it ensures that the data packets are properly sequenced for reassembly. The FCS is a vital part at the end of the frame that helps ensure the integrity of the transmitted data by allowing the detecting of errors.
In an 802.11 MAC frame, the components are arranged in a specific order. After the ADD3 field, the next component is the Sequence Control (SEQ). The Sequence Control field manages the sequencing and acknowledgment of frames, helping maintain the order of transmitted frames and ensuring data integrity. It includes information such as the fragment number and sequence number.
Following this, the Address 4 (ADD4) field may be present in some frame types, but it is not always required. Address 4 is typically used in wireless distribution system (WDS) frames. Subsequently, the frame structure may include the Data field, carrying the actual payload or information to be transmitted.
Finally, the Frame Check Sequence (FCS) appears at the end, serving as a checksum for error detection, allowing the receiving end to verify the integrity of the received frame.
The correct answer is A) Sequence Control (SEQ).