At which OSI layer is a destination port number added to a PDU during the encapsulation process?
- transport layer
- data link layer
- network layer
- application layer
| Explanation & Hint:
A destination port number is added to a Protocol Data Unit (PDU) during the encapsulation process at the “transport layer,” which is also known as OSI Layer 4. Port numbers are used to direct data to specific services or processes on a device, allowing for the proper delivery and communication of data between applications. |