This one gives me some pause in the context of a virtual machine in a cloud 
computing environment. I rather like the idea of associating identifiers with 
an application or set of applications, and only by extension of that referring 
to physical or virtual machines. For example, in cloud environments, if a 
process or set of processes moves from one machine (physical or virtual) to 
another, it would be nice to be able to move all of its/their sessions with 
it/them.

On Jun 11, 2010, at 6:18 AM, RJ Atkinson wrote:

> D) An "Identifier" is a topology-independent name for a logical 
>  node. Depending upon instantiation, a "logical node" might be 
>  a single physical device, a cluster of devices acting as a 
>  single node, or a single virtual partition of a single physical 
>  device.  An OSI End System Identifier (ESID) is an example of 
>  an identifier.  A Fully-Qualified Domain Name that precisely 
>  names one logical node is another example. (Note well that not 
>  all FQDNs meet this definition.)

http://www.ipinc.net/IPv4.GIF

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