[TriLUG] Does JVM use the TCP/IP stack when talking through 127.0.0.1 to a nother JVM?

[Ryan Leathers]

The JVM talks to the socket
The socket can only exist if a TCP/IP stack exists at both the source
and destination.  

Socket = 14 bytes:

IP source addr = 4 bytes (192.168.1.1)
source protocol= 1 byte  (TCP, UDP)
source port    = 2 bytes (1-65535)
IP dest. addr  = 4 bytes (127.0.0.1)
dest. protocol = 1 byte  (TCP/UDP)
dest. port     = 2 bytes (1-65535)
Total          =14 bytes

Does this help?



On Wed, 2004-06-09 at 13:47, Phillip Rhodes wrote:
> Christopher L Merrill wrote:
> 
> > Smith, Brett wrote:
> > 
> >> Does JVM use the TCP/IP stack when talking through 127.0.0.1 to 
> >> another JVM?
> >> This is over my head but a developer needs the answer so don't flame 
> >> if I am
> >> way off.
> > 
> 
> I'd say that in general the answer is "yes", with the caveat
> that it might depend on the underlying operating system.  That is,
> 127.0.0.1 is an IP address, just like any other, and traffic sent
> through that interface is IP traffic, blah, blah..
> 
> But, it is a "special" address in a sense, and I suppose the
> OS might be allowed by the specs to treat that traffic differently
> than "normal" IP traffic...
> 
> Still, I'd be highly inclined to think that for all practical
> purposes you can assume that it does.
> 
> TTYL,
> 
> Phil
> 
> -- 
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-- 
Ryan Leathers <ryan.leathers at globalknowledge.com>
Global Knowledge