In the TCP/IP model what is the sequence of layers from top to bottom?

The correct answer is Application Layer, Transport Layer, Internet Layer, Network Interface Layer.

Key Points

• The TCP/IP model is a conceptual framework used to describe the communication processes in networking.
• The layers of the TCP/IP model, arranged from top to bottom, are as follows:
  • Application Layer: This layer is responsible for providing network services to applications. It includes protocols such as HTTP, FTP, SMTP, and DNS.
  • Transport Layer: Ensures reliable communication between devices. Protocols like TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate here.
  • Internet Layer: Handles addressing, routing, and packet delivery. The most common protocol in this layer is IP (Internet Protocol).
  • Network Interface Layer: Deals with the physical and data link layers, managing hardware addressing and the actual transmission of data over the network.

Additional Information

• The TCP/IP model is a streamlined version of the OSI model, consisting of only four layers compared to OSI's seven layers.
• It is the foundation of modern internet communication and has been widely adopted globally.
• Each layer in the TCP/IP model has specific tasks and communicates with adjacent layers to ensure seamless data transmission.
• Understanding the TCP/IP model is essential for networking professionals, as it provides a clear structure for troubleshooting and designing networks.