At which OSI layer is a source IP address added to a PDU during the encapsulation process?
- network layer
- data link layer
- transport layer
- application layer
| Explanation & Hint:
The source IP address is added to a Protocol Data Unit (PDU) at the “network layer,” which is also known as OSI Layer 3. The network layer is responsible for routing and forwarding data between different networks, and IP addresses are used to uniquely identify the source and destination of data at this layer. |