The process of prepending protocol information with information from another protocol is called:

The process of prepending protocol information with information from another protocol is called "Encapsulation".

Here are the steps of how it works:

1. The data that needs to be sent is first created or generated by an application. This data is then passed down to the next layer in the network protocol stack, the Transport layer.

2. The Transport layer adds its own header information to the data. This header information is used to ensure that the data is delivered correctly, and includes details such as the source and destination ports.

3. The data, now with the Transport layer header, is passed down to the Network layer. The Network layer adds its own header, which includes information such as the source and destination IP addresses.

4. The data, now with both the Transport and Network layer headers, is passed down to the Data Link layer. The Data Link layer adds its own header and footer, which includes information such as the source and destination MAC addresses.

5. Finally, the data, now encapsulated with headers (and a footer) from the Transport, Network, and Data Link layers, is sent over the physical network.

This process of adding headers (and sometimes footers) to the data from each layer is called encapsulation. It allows each layer to add its own specific information to the data, ensuring that it can be correctly processed and delivered to the destination.