Which TCP/IP layer is responsible for addressing?

The Internet Layer of the TCP/IP model is responsible for addressing and routing packets of data across different networks. This layer primarily uses the Internet Protocol (IP) for addressing devices within a network. Each device on a network is assigned a unique IP address, which enables the identification of the source and destination of data packets. The Internet Layer is critical for the proper forwarding of these packets through potentially multiple intermediate networks to reach the intended destination.

In addition to addressing, the Internet Layer is also responsible for fragmentation and reassembly of packets when they need to be transmitted across networks that may have different maximum transmission unit (MTU) sizes. This layer effectively ensures that data can be sent from one network to another while adhering to addressing schemes and routing protocols, allowing different network segments to interact seamlessly.

Other layers in the TCP/IP model have distinct roles that do not focus specifically on addressing. The Application Layer, for example, deals with application-specific functionalities and protocols necessary for user interactions. The Transport Layer is primarily responsible for end-to-end communication, ensuring data is delivered reliably and in the correct order, often using protocols like TCP and UDP. The Network Access Layer encompasses the technologies and protocols used for the physical transmission of data over various types of physical networks but does not handle