Final answer:
The Transport layer in the TCP/IP model is responsible for end-to-end delivery, relying on TCP for reliable transfers and UDP for faster, but less reliable, data transmission.
Step-by-step explanation:
TCP/IP Model and End-to-End Delivery
The TCP/IP layer responsible for end-to-end delivery of data is the Transport layer. This layer ensures that data is delivered from one end system to another, with the means for error recovery and flow control.
Primarily, the Transmission Control Protocol (TCP) at this layer ensures reliable data transfer through its connection-oriented approach, which includes establishing a connection before data is transmitted, ensuring all packets are delivered error-free, and in the correct sequence.
Unlike TCP, the User Datagram Protocol (UDP) offers a connectionless service at this layer, which means it sends data without establishing a connection and does not guarantee delivery, making it a faster, but less reliable option.
Understanding the protocols involved at the Transport layer is crucial for comprehending how the internet works to reliably send and receive data.