Apology for this belated response. In an effort to get ready for our
next meeting, I've been going through the mail again....
-----Original Message-----
From: Christian Vogt [mailto:[email protected]]
Sent: 30 June 2009 20:51
To: Krug,AL,Louise,CXR9 R
Cc: [email protected]; [email protected]
Subject: Re: [rrg] Next topic: properties of identifiers
Is host identification most useful for fault finding?
Louise -
Absolutely. In fact, there is a richness of purposes for
which one may need identifiers. What I claim is that most of
those purposes are application-specific and not essential to
an Internet architecture. For example, fault finding is the
purpose of a debugging application.
An Internet architecture must be versatile enough to enable
applications to use their own identifiers. But to do this,
the Internet architecture itself must incorporate identifiers
for only two purposes: to identify a peer service for
contact establishment, and to identify a session instantiated
during contact establishment. On top of that, applications
can do what they want, such as providing a means to identify
hosts for fault finding. Does this make sense?
- Christian
It makes sense in the abstract, but I am still mulling the question
"if
a lot of applications would need something such as a host ID, and the
network does not provide it will we end up with a lot of different
ways
of providing it, and possibly some very nasty ways (like IP addresses
got overused). I guess then you might say that you have the core
architecture and a set of extras that need to be standardised but you
should not expect them to be gloablly available?
we are facing complex design issues. I feel that one way to make us
see the picture clearly is to clarify any vague notion, so here is
one: the above says
"if a lot of applications would need something such as
a host ID, and the network does not provide it will we
end up with a lot of different ways of providing it..."
What is this "network" referred to in the above?
The data delivery network?
or the overall Internet architecture?
I assume the answer is the latter?
Do you think the session need to have a globally unique identifier or
locally agreed between the endpoints during the contact establishment?
I've seen multiple mentioning about "sessions", but yet to see a clear
definition of it.
Lixia
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