File Transfer Protocol (FTP): FTP is a batch transmission utility that operates through TCP and allows systems to send non-real time-sensitive bulk data. Downloading files from a Web site or downloading MP3s on a peer-to-peer service would be typical FTP tasks.

Simple Mail Transfer Protocol (SMTP)/Post Office Protocol (POP): These are utilities that work with TCP to send and receive email messages.

Telnet: This is another TCP-oriented application that supports remote terminal access. Telnet is designed for character-oriented terminals like the DEC VT-100 series.

Hyper Text Mark-up Language (HTML)/Hyper Text Transfer Protocol (HTTP): HTML defines the formatting used in Web pages, and HTTP describes the rules for downloading a Web page from a server to a browser. HTTP also operates through TCP.

Secure Hyper Text Transfer Protocol (SHTTP): This is an adjunct to HTTP that defines a mechanism for generating keys and encrypting information in a Web session. In Web commerce, a browser is typically transitioned into SHTTP when a user must enter a credit card number or other sensitive information.

Real-Time Transport Protocol (RTP): This is the protocol used to transport for real-time voice and video. The main function of RTP is to identify the payload encoding (e.g., G.711 or...