At which OSI layer is a source MAC address added to a PDU during the encapsulation process?
- data link layer
- application layer
- transport layer
- presentation layer
| Explanation & Hint:
A source MAC (Media Access Control) address is added to a Protocol Data Unit (PDU) during the encapsulation process at the “data link layer,” which is also known as OSI Layer 2. The data link layer is responsible for the addressing and control of data frames on the local network segment, and MAC addresses are used to identify individual devices on the same network segment at this layer. |