Final answer:
Option (B), The processes described, such as encapsulation/decapsulation and maintaining MAC and routing tables, are associated with the data plane, while NAT and ACLs are controlled by the control plane in network architecture.
Step-by-step explanation:
The question deals with various functionalities that are part of different planes in network architecture. When discussing encapsulation/decapsulation of packets, adding/removing of trunk headers, MAC table, routing tables (IP addresses), encryption, NAT, ACLs, we are referring to processes and elements that are controlled by the data plane and sometimes the control plane.
The data plane, also known as the forwarding plane, is responsible for the actual forwarding of packets based on the routing table. It handles the day-to-day operation of the network by processing the data traversing the system. Encapsulation and decapsulation of packets, as well as adding/removing headers related to VLAN (Virtual LAN) trunks, happen at this level.
The control plane manages the routing tables that determine the best paths for data transmission. It is also involved in network address translation (NAT) and enforcing access control lists (ACLs), which control incoming and outgoing network traffic.
Encryption, while typically associated with the data plane as it involves actual data packets, can also be influenced by policies set in the control plane.