What is done to an IP packet before it is transmitted over the physical medium?It is segmented into smaller individual pieces.It is encapsulated in a Layer 2 frame.It is encapsulated into a TCP segment.It is tagged with information guaranteeing reliable delivery.

Before an IP packet is transmitted over the physical medium, several steps are taken:

1. Segmentation: If the data is too large to be sent as a single IP packet, it is divided into smaller individual pieces. This process is known as segmentation.

2. Encapsulation into a TCP segment: The IP packet is then encapsulated into a TCP segment. TCP (Transmission Control Protocol) is a transport layer protocol that provides reliable, ordered, and error-checked delivery of a stream of packets on the internet.

3. Tagging for reliable delivery: The TCP segment is tagged with information that guarantees reliable delivery. This includes sequence numbers (to ensure the data is delivered in the correct order) and a checksum (to verify the data hasn't been corrupted in transit).

4. Encapsulation in a Layer 2 frame: Finally, the TCP segment is encapsulated in a Layer 2 frame. This frame includes the MAC addresses of the source and destination devices, as well as error-checking information. The frame is then ready to be transmitted over the physical medium.