Identify the layers in the Internet protocol stack responsible for router process, link-layer switch process and host process.

The Internet protocol stack, also known as the TCP/IP model, consists of four layers. Each layer is responsible for different processes:

1. Application Layer: This is the topmost layer responsible for handling protocols that deal with user-level data. Examples include HTTP, SMTP, FTP, etc. This layer is primarily involved in host processes.

2. Transport Layer: This layer is responsible for end-to-end communication between the host processes. It uses protocols like TCP and UDP.

3. Network Layer: This layer is responsible for the router process. It handles the routing of data packets. The main protocol used in this layer is the Internet Protocol (IP).

4. Link Layer: This layer is responsible for the link-layer switch process. It deals with the physical transmission of data and handles protocols like Ethernet and Wi-Fi.

So, to answer your question, the router process is handled by the Network Layer, the link-layer switch process is handled by the Link Layer, and the host process is handled by the Application Layer.