The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

TCP/IP Transmission Control Protocol/Internet Protocol

The suite of protocols that allows different computer platforms using different operating systems (such as Windows, MacOS, or UNIX) or different software applications to communicate. Although TCP and IP are two distinct protocols, each of which serves a specific communicational purpose, the term TCP/IP is used to refer to a set of protocols, including Hypertext Transfer Protocol (HTTP), File Transfer Protocol (FTP), Simple Mail Transfer Protocol (SMTP), Post Office Protocol (POP), and many others. This set of protocols allows computers on the Internet to exchange different types of information using different applications.

Internet protocols that every Internet user and every Internet server uses to communicate and transfer data over networks. TCP packages data into packets that are sent over the Internet and are reassembled at their destinations. IP handles the addressing and routing of each data packet so it is sent to the correct destination.