Which two ports are contained in the transmission control protocol (TCP) header?

The transmission control protocol (TCP) header includes two crucial fields known as the Destination and Source ports. These ports play an essential role in how data is directed and managed across the network.

The Source port indicates the originating process or service on the sender's machine, allowing the receiving device to understand where the data is coming from. Meanwhile, the Destination port specifies the intended recipient's service or application, directing the transmitted data to the correct location on the receiving device. This structure enables multiple applications to use the internet at the same time, as each application's data is associated with specific ports.

In contrast, other options like Local and Remote, Client and Server, or Public and Private do not accurately reflect technical components of the TCP header. While they may relate to networking concepts, they do not correspond to the actual fields found within the TCP protocol specifications.