Research regarding the updated TCP/IP network model and the differences between the old TCP/IP network model to the updated TCP/IP network model.

Sure, here is a step-by-step guide to understanding the updated TCP/IP network model and the differences between the old and the updated model.

1. Understanding the TCP/IP Network Model: The TCP/IP network model is a suite of communication protocols used to interconnect network devices on the internet. TCP/IP can also be used as a communications protocol in a private network (an intranet or an extranet).

2. The Old TCP/IP Model: The original TCP/IP model consisted of four layers: Network Interface, Internet, Transport, and Application. The Network Interface layer was responsible for placing TCP/IP packets on the network medium and receiving TCP/IP packets off the network medium. The Internet layer was responsible for addressing, packaging, and routing functions. The Transport layer was responsible for keeping track of the packets being sent and reassembling them in the correct order. The Application layer was responsible for creating and managing network sessions.

3. The Updated TCP/IP Model: The updated TCP/IP model has been expanded to five layers to more accurately describe the functionality of different protocols. The new layers are: Physical, Data Link, Network, Transport, and Application. The Physical layer is responsible for the physical aspects of the data transmission. The Data Link layer is responsible for data transfer across the physical link in a network. The Network layer is responsible for the delivery of packets from the source host to the destination host based on their addresses. The Transport layer is responsible for the transfer of data between hosts. The Application layer is responsible for providing services to the software through which the user requests network services.

4. Differences Between the Old and Updated TCP/IP Model: The main difference between the old and updated TCP/IP model is the addition of the Physical and Data Link layers in the updated model. These layers were not explicitly defined in the old model. The updated model provides a more detailed understanding of the network's operation by clearly defining these layers. The updated model also provides a better alignment with the OSI model, which is another widely used networking model.

5. Importance of the Updated TCP/IP Model: The updated TCP/IP model provides a more detailed and accurate description of the networking process. This makes it easier for network engineers and IT professionals to understand and manage network communications. It also helps in troubleshooting network issues as each layer of the model can be tested and analyzed separately.