Which of the following serves to encapsulate data in the TCP/IP model during transmission?

In the TCP/IP model, encapsulation occurs at various layers, with each layer adding its own header to the data being transmitted. The term "datagrams" specifically refers to the format used by the Internet layer in the TCP/IP model. When data is transmitted between devices, it is encapsulated in datagrams, which contain both the payload (the actual data being transmitted) and the necessary headers for routing and addressing.

The use of "datagram" emphasizes the protocol's connectionless nature, which means that each datagram is treated independently and can take different paths to reach its destination without requiring a dedicated connection. This encapsulation allows for efficient transmission across the network.

In contrast, packets, frames, and segments refer to encapsulation in different contexts and layers. Packets are generally associated with the network layer of the OSI model, frames are used in the data link layer, and segments pertain to the transport layer (specifically with TCP). Each of these has a distinct role in data encapsulation, but the specific terminology utilized in the context of the TCP/IP model for data transmission at the Internet layer is datagrams.