The Application layer of the TCP/IP model is similar to the Session, Presentation, and Application layers of the OSI Reference Model.
The most popular Application layer protocols are:
(i) Hypertext Transfer Protocol (HTTP): The core protocol of the World Wide Web.
(ii) File Transfer Protocol (FTP): enables a client to send and receive complete files from a server.
(iii) Telnet: connect to another computer on the Internet.
(iv) Simple Mail Transfer Protocol (SMTP): Provide e-mail services.
(v) Domain Name System (DNS): Refer to other host computers by using names rather than numbers
