Final answer:
The next component in an 802.11 MAC frame after FC, DUR/ID, ADD1, ADD2, and ADD3 is the Sequence Control field. This field is used to keep track of the frame sequences for ensuring proper packet ordering and to avoid duplicates, which is essential for reliable communication.
Step-by-step explanation:
The question pertains to the composition of an 802.11 MAC (Media Access Control) frame which is a part of wireless networking protocols. According to the 802.11 standards, after the FC (Frame Control), DUR (Duration)/ID, ADD1 (Address 1), ADD2 (Address 2), and ADD3 (Address 3) fields, the next component in the frame is the Sequence Control field. This field is used to keep track of the frame sequences for ensuring proper packet ordering and to avoid duplicates, which is essential for reliable communication.