Question: What action should a BAP (Backhaul Adaptation Protocol) entity take upon receiving a BAP Data PDU with an unrecognized BAP address during Routing operations, or a BAP Control PDU containing reserved/invalid values?
Option 1: Forward the PDU to a default route for further analysis.
Option 2: Discard the received BAP PDU to prevent potential protocol disruptions.
Option 3: Send an error notification to the source node and request retransmission.
Option 4: Temporarily store the PDU for possible future reference or debugging.
Explanation: Discarding the PDU is the appropriate action to prevent potential disruptions to the protocol's operation. Unrecognized addresses in Data PDUs or reserved/invalid values in Control PDUs could indicate errors, misconfigurations, or even security threats. By discarding such PDUs, the BAP entity maintains the integrity and stability of the backhaul adaptation process, aligning with robust network management principles.