Which layer is described as responsible for preparing data to be transported across the network?

Which layer is described as responsible for preparing data to be transported across the network?

• A. Transport Layer
• B. Session Layer
• C. Network Layer
• D. Application Layer

Answer: (A)

Preparing data to be transported across the network is handled by the Transport Layer. It sits between the upper-layer protocols that generate data and the Network Layer that actually moves packets across the network. The Transport Layer takes the data from above, breaks it into segments (or datagrams for the chosen transport protocol), and adds headers that include port numbers so the receiving host can deliver the data to the correct application. It also provides end-to-end control features like reliability and flow control (as with TCP) or operates with no such guarantees (as with UDP), but in all cases its job is to organize and manage data for transmission between hosts. The Network Layer handles routing and addressing of packets, the Session Layer manages dialog sessions, and the Application Layer is where data originates and user-facing services run.

Preparing data to be transported across the network is handled by the Transport Layer. It sits between the upper-layer protocols that generate data and the Network Layer that actually moves packets across the network. The Transport Layer takes the data from above, breaks it into segments (or datagrams for the chosen transport protocol), and adds headers that include port numbers so the receiving host can deliver the data to the correct application. It also provides end-to-end control features like reliability and flow control (as with TCP) or operates with no such guarantees (as with UDP), but in all cases its job is to organize and manage data for transmission between hosts. The Network Layer handles routing and addressing of packets, the Session Layer manages dialog sessions, and the Application Layer is where data originates and user-facing services run.