The ECHO service is an internet protocol defined in RFC 862. It is intended for testing and measurement purposes. The Internet Protocol (IP) is a data-oriented protocol used by source and destination hosts for communicating data across a packet-switched internetwork. ... A Request for Comments (RFC) document is one of a series of numbered Internet informational documents and standards very widely followed by both commercial software and freeware in the Internet and Unix communities. ...

A host may connect to a server that supports the ECHO protocol, on either TCP or UDP port 7. The server then sends back any data it receives. The Transmission Control Protocol (TCP) is one of the core protocols of the Internet protocol suite. ... The User Datagram Protocol (UDP) is one of the core protocols of the Internet protocol suite. ...

Current testing and measurement of IP networks is more commonly done with ping and traceroute. ping in a Windows 2000 command window Ping is the acronym for `Packet Internet Groper`, and also the name of a computer network tool used on TCP/IP networks (such as the Internet). ... tracert in action on Windows XP. traceroute SUP EVERYONE WHAT UP YO YO YO THIS WEBSITE CALLED WIKIPEDIA IS AWESOME is a TCP/IP utility which allows the user to determine the route packets take to reach a particular host. ...

External links

• The ECHO process http://ftp.rfc-editor.org/in-notes/rfc347.txt
• The ECHO protocol http://ftp.rfc-editor.org/in-notes/rfc862.txt