OpenRFC.org Requests For Comments ... for the community
Welcome to OpenRFC
Home Full RFC index RFC humour Our technology
 
RFC 862
Echo Protocol.
J. Postel. May 1983.

 
[Direct link][Download PDF version][Download text version]
 

Network Working Group J. Postel Request for Comments: 862 ISI May 1983 Echo Protocol This RFC specifies a standard for the ARPA Internet community. Hosts on the ARPA Internet that choose to implement an Echo Protocol are expected to adopt and implement this standard. A very useful debugging and measurement tool is an echo service. An echo service simply sends back to the originating source any data it receives. TCP Based Echo Service One echo service is defined as a connection based application on TCP. A server listens for TCP connections on TCP port 7. Once a connection is established any data received is sent back. This continues until the calling user terminates the connection. UDP Based Echo Service Another echo service is defined as a datagram based application on UDP. A server listens for UDP datagrams on UDP port 7. When a datagram is received, the data from it is sent back in an answering datagram. Postel [Page 1]

   

[Home] [Full RFC index] [RFC humour] [Our technology]

Copyright © Inter-Corporate Computer & Network Services, Inc.  All rights reserved.
All trademarks and RFC contents are the property of their respective owners.