Re: Interplanetary communications protocols

From: Rick Jones (foo_at_bar.baz.invalid.retro.com)
Date: 01/24/05 

To: sci-space-tech@moderators.isc.org
Date: Mon, 24 Jan 2005 18:24:57 GMT

In sci.space.tech th <someguy@somewhere.se.retro.com> wrote:
> I don't understand your comment on how the 8-bit protocol ID field in
> the IP datagram would be used for routing. It should rather be the IP
> address that determiones the routing

Demux to a higher level protocol or application within the node. Not
routing. In a plain terrestrial IP network, the protocol field will
direct one to UDP or TCP (or some of the other protocols), which have
16 bit port numbers (TCP and UDP) to take one to the actual endpoints.

When someone suggested (or I interpreted them as suggesting) using
plain/bare IP, I took that to mean using the IP protocol field as the
only demux, hence a limit of 256 "endpoints/connections" at a given IP
address.

rick jones 

-- 
denial, anger, bargaining, depression, acceptance, rebirth...
                                     where do you want to be today?
these opinions are mine, all mine; HP might not want them anyway... :)
feel free to post, OR email to raj in cup.hp.com  but NOT BOTH...

Relevant Pages

  • Re: Interplanetary communications protocols
    ... > the IP datagram would be used for routing. ... Demux to a higher level protocol or application within the node. ... In a plain terrestrial IP network, the protocol field will ... When someone suggested (or I interpreted them as suggesting) using ...
    (sci.space.history)
  • Re: Interplanetary communications protocols
    ... >>the IP datagram would be used for routing. ... In a plain terrestrial IP network, the protocol field will ... > When someone suggested (or I interpreted them as suggesting) using ... routing path or to record the path used to reach the destination. ...
    (sci.space.history)
  • Re: Interplanetary communications protocols
    ... >>the IP datagram would be used for routing. ... In a plain terrestrial IP network, the protocol field will ... > When someone suggested (or I interpreted them as suggesting) using ... routing path or to record the path used to reach the destination. ...
    (sci.space.tech)
Quantcast