TCP/IP model

- [Instructor] In addition to the OSI model, there's another reference model I want you to know about. It's the TCP/IP model. Interestingly, there are some variants of this TCP/IP model that give different names to the bottom layers. Let's check out a few that you might see. Here we see the seven-layer OSI model. Let's compare this against the TCP/IP model, and commonly the TCP/IP model combines the OSI model's physical and data link layers into a single network access layer. The network layer is renamed as the internet layer and the transport layer name stays the same. The big difference between these two models though is combining layers five through seven into a single application layer, and one variant that you might see calls the network access layer the network interface layer, or you might see this layer called the link layer. And what we've seen up to this point is a four-layer TCP/IP model. However, some…