Answer
See the explanation
Work Step by Step
Here are the four layers in the Internet software hierarchy and a task performed by each layer:
1. **Application Layer:**
- **Task:** This layer deals with providing network services directly to end-users. It includes protocols for communication, data exchange, and user interfaces. An example task is supporting email communication through protocols like SMTP.
2. **Transport Layer:**
- **Task:** The transport layer ensures reliable and efficient data transfer between two devices on a network. It is responsible for error detection and correction, as well as flow control. An example task is segmenting data into smaller packets and ensuring they reach the destination in the correct order through protocols like TCP (Transmission Control Protocol).
3. **Network Layer:**
- **Task:** The network layer handles the routing of data packets between devices on different networks. It is responsible for logical addressing, packet forwarding, and routing decisions. An example task is determining the optimal path for data to travel from the source to the destination through protocols like IP (Internet Protocol).
4. **Link Layer:**
- **Task:** The link layer deals with the physical connection between devices within the same network. It is responsible for the framing, addressing, and error detection of data frames. An example task is the transmission of data frames over a local network using protocols like Ethernet.
These layers collectively form the Internet software hierarchy, each contributing to the efficient and reliable functioning of network communication.
