Which Statement Is True About The Tcp/Ip And Osi Models?

Which Statement Is True About The TCP/IP And OSI Models?

Now, let us talk about the TCP/IP and the OSI model. What is the TCP/IP model?. How it is related to the OSI model. The TCP/IP is a type of model to standardize computer networking. It is the same definition as the OSI model. The below figure represents the TCP/IP model. It has four simple layers they are application layer, the transport layer internet layer, and the link layer. Similar to the OSI model, the direction flow depends upon the sending or receiving of the information. The above layers are the old model. The new and updated model is the physical layer, data link layer, network layer, transport layer, and application layer. Here we have one extra layer and one renamed layer from the old model of the TCP/IP. The link layer has been split into the data link layer and the physical layer. And the internet layer has been renamed to the network layer.

Now let us compare the TCP/IP model with the OSI model to understand this concept in a better way. As we already know, the OSI model will be having seven different layers when we compare it to the five-layer of the TCP/IP model. Now, let us know about the protocols and devices present at each layer. We have application protocols at the application layer such as HTTP, SMTP, and FTP. And we have two most common transport protocols. These are called TCP and UDP. we also add ports numbers here. And at the network layer of the OSI model, we have the Internet protocol, all the routers also can operate at this layer. And the other layer is called the data link layer, In the data link layer, we have ethernet and the switches. The switches typically operate at this layer. Although we can get the layer 3 switches, they have some of the routing capabilities. Finally, we will be having a physical layer. Cables, network interface cards. When we send the data through the layers, each layer will be adding its own bit of information. This process we call encapsulation.

When we hit the physical layer, the data will be transmitted over to the receiving device. The receiving device then starts to decapsulate the data. Let start with the application layer, the data at the application layer will be passing to the next layer, here the transport information is added, let say the information added is the TCP header, each time when the header is added, this will contain a piece of specific information. suppose let us take a TCP header, that will contain the source and the destination number, sequence number, and few more bits of information. And in the network layer, we will be adding the IP header. This will contain the source and the destination address and some other bits of the information in it. And at last, we will be having the data link layer, in the data link layer, we add the header and the trailer as well. The header will contain the main lead destination, source mac address. The trailer will contain some of the error-checking information and checks whether the data has been received correctly. And when the data hits the physical layer, it will physically transmit the data.