Explain the concept of TCP data transmission?

Answer 1

TCP Communications
TCP is a connection-oriented protocol, which means that before two systems
can exchange application layer data, they must first establish a connection. This
connection ensures that both computers are present, operating properly, and
ready to receive data. The systems also exchange information about their capabilities,
which determines how subsequent communications will proceed. The TCP
connection remains active during the entire exchange of data, after which the
systems close it in an orderly manner.
In most cases a TCP connection exists for the duration of a single file transmission.
For example, when a Web browser connects to a server on the internet, it
first establishes a connection with the server, then it transmits a Hypertext Transfer
Protocol (HTTP) request message specifying the file it wants to download, and
finally it receives the file from the server. After the file is transferred, the systems
terminate the connection. As the browser processes the downloaded file, it might
detect links to graphic images, audio clips, or other files needed to display the
Web page. The browser then establishes a separate connection to the server for each
of the linked files, retrieves them, and displays them as part of the downloaded page.
Thus, downloading a single Web page might require the browser to create many separate
TCP connections to the server to download the individual files.
Establishing a Connection
Transmitting Data
Transmitting Data
Transmitting Data
Flow Control
communication is like below:
FIN
ACK
FIN
ACK