[e2e] What is the meaning of "end-to end"?
fred at cisco.com
Sat May 12 22:40:33 PDT 2001
At 02:05 PM 5/12/2001, Mirela Perusia wrote:
>Could you be so kind as to tell me what the meaning of "end-to-end" is?
As the term was originally coined, it is from the place that a message
originates to the place it terminates - from application to application. In
HTTP, from browser to web server application, or back again. In mail, at
least from email application to email application, and perhaps from user to
The interesting thing here is that you can look at this at any layer, and
so you will find:
- the MPLambdaS crowd calling their solutions end to end when
what they mean is "entirely through an optical domain",
- IPSEC implementations (between IP and TCP) going "end to end"
meaning "from originating computer to terminating computer"
- similarly, TCP sessions that go from TCP implementation to TCP
One person's "edge" is another person's "end", and in some sense each is
right - the principal can be applied at any layer, and in such a context
refers to that layer's relationship with those below it.
More information about the end2end-interest