What is the name of the four-layer networking model defined by the Internet Engineering Task Force (IETF)?

The four-layer networking model defined by the Internet Engineering Task Force (IETF) is known as the TCP/IP Model. This model is foundational to the Internet and outlines the protocols and standards that facilitate communication across networks. The layers in the TCP/IP Model are:

1. Application Layer: This layer enables end-user services and applications to communicate over the network. It encompasses protocols such as HTTP, FTP, and SMTP.

2. Transport Layer: This layer is responsible for delivering messages between applications. It includes important protocols such as Transmission Control Protocol (TCP) and User Datagram Protocol (UDP), which manage data flow and ensure reliability.

3. Internet Layer: This layer facilitates the routing of packets across a network. It includes the Internet Protocol (IP), which is crucial for addressing and routing data.

4. Link Layer: This lowest layer handles the transmission of data over physical network connections and defines protocols for how data packets are physically sent over communication links.

The development and standardization of the TCP/IP Model were pivotal in making the Internet functional, which explains why it is associated directly with the IETF. This model has become the standard for networking and is widely used in various protocols and services today, making it essential for