How many layers are there in the TCP/IP model?

The correct answer is based on the structure of the TCP/IP model, which is a fundamental framework used for understanding and implementing network communication protocols. The TCP/IP model consists of four distinct layers, each serving a specific purpose in the process of data transmission.

These layers are:

1. Application Layer: This topmost layer encompasses the protocols that applications use to communicate over the network. It includes protocols such as HTTP for web traffic, FTP for file transfers, and SMTP for email.

2. Transport Layer: This layer is responsible for end-to-end communication between devices. It ensures that data is delivered accurately and in order, utilizing protocols such as TCP (Transmission Control Protocol) for reliable communication and UDP (User Datagram Protocol) for faster, less reliable communication.

3. Internet Layer: This layer is tasked with addressing, packaging, and routing data across the network. The Internet Protocol (IP) is the most well-known protocol in this layer, responsible for logical addressing and routing.

4. Link Layer: The bottom layer handles the physical transmission of data over various types of networks. It includes protocols that manage how data physically moves through the network, such as Ethernet and Wi-Fi.

Understanding these four layers helps in grasping