On Tue, May 19, 2009 at 10:53:05AM +0200, João Távora wrote: > Given a NDA forbids me from giving you more details let me give you > an analogy with postal services: I assume you know of postal services > where you can get a delivery receipt. you can get a receipt that the > recipient was notified, if the postman gets shot along the way, the > postal service will send more postman. If they run out of postmen I > get a receipt stating the delivery was impossible.
Analogies always fail :-) A normal letter is UDP: you don't know if it even arrives. A letter with delivery receipt (registered mail?) is like TCP: you know the letter has arrived, but you don't know it's been read. The equivalent of application acknowledgment would be the *letter* saying to the person "once you read this, return the attached form." Then you need the application has read the message and done something about it. Then again, you can probably twist the analogy in a totally different way to say something even different. Bottom line is, each layer of a network is responsible for its own stuff. Y. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
