Which two protocols work together at the transport layer to ensure data reaches the correct applications?

The chosen answer is correct because UDP (User Datagram Protocol) and TCP (Transmission Control Protocol) are the two primary transport layer protocols used to facilitate communication between applications over a network.

Both of these protocols handle the encapsulation of data in a manner that allows it to be sent and received by the correct applications on a device. TCP is connection-oriented, which means it establishes a reliable connection between the sender and receiver before data is transmitted. This ensures that data packets are delivered in order, without duplication, and allows for error checking and correction. In contrast, UDP is connectionless, offering a faster, less reliable service that is suitable for applications where speed is more critical than reliability, such as streaming video or gaming.

Together, these protocols complement different application needs in managing data transmission, ensuring that information reaches the intended applications correctly based on their requirements for speed, reliability, and efficiency. Their roles at the transport layer are essential for ensuring that the data transfer process is managed correctly, allowing applications to communicate effectively over the network.