Communication Model Behind the Internet |TCP/ IP Model |Working Model of the Internet Explained

October 29, 2023

Difference between osi model and TCP/IP model
TCP/IP was designed and developed by the Department of Defense (DoD) in the 1960s.
It stands for Transmission Control Protocol/Internet Protocol.
TCP and IP are different protocols of Computer Networks.
IP finds the destination of the mail and TCP has the work to send and receive the mail.
The TCP/IP model is a concise version of the OSI model.
It contains four layers, unlike the seven layers in the OSI model.
The TCP/IP model became the standard for modern networks and is the model that we all use now on the modern Internet. OSI model is used for academic purposes and as a reference model.
TCP/IP PROTOCOL SUITE
Communications between computers on a network is done through protocol suits.
The most widely used and most widely available protocol suite is TCP/IP protocol suite.
A protocol suit consists of a layered architecture where each layer depicts some functionality which can be carried out by a protocol.
TCP/IP is normally considered to be a 4 layer system.
Application layer
Transport layer
Network layer
Data link layer
At the target machine, when packet reaches at this layer, the TCP at this layer makes note of the sequence number of the packet and sends an acknowledgement.
Now, if the host TCP does not receive the acknowledgement within some specified time, it re sends the same packet. So this way TCP makes sure that no packet gets lost.