Final answer:
TCP features such as full-duplex, reliable, and stateful communication, but 'atomic' is not a feature of TCP. Atomicity is related to operations in databases and programming, while TCP is about data transmission over networks. so, option b is the correct answer.
Step-by-step explanation:
The student is asking about the features or advantages of TCP, which is a core protocol of the Internet Protocol Suite. TCP stands for Transmission Control Protocol and it ensures the reliable, ordered, and error-checked delivery of a stream of data between applications running on hosts communicating over an IP network. The correct features of TCP are that it provides a full-duplex, reliable, and stateful connection. It is also synchronous in the sense that it ensures that there is a back-and-forth communication happening between the client and server.
However, atomic is the term which does not correctly describe a feature of TCP. Atomicity typically refers to operations that are completed in a single step without interruption, which is a concept more associated with database transactions or atomic operations in concurrent programming languages. TCP, conversely, deals with streams of data that might be fragmented and reassembled, rather than atomic transactions.