RE: length of community strings

> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Dave Shield
> Sent: Friday, April 17, 2009 12:41 AM

> 2009/4/16 Mike Ayers <[email protected]>:
> >        Wikipedia as a technical reference?!  Please...
> 
> What's wrong with that?
> 
> Sure - if I want a definitive answer, then I'll go to the RFCs.
> But if I want a quick overview to get me started (and something that
> I might actually understand!) , then Wikipedia is a 
> reasonable first call.

	As are web searches.  That's not the point.  Wikipedia is not a citable reference, if for no other reason than that the content is subject to change without notice, so what I read may not be the same thing you read.

	Also, while the RFCs are reasonably authoritative for SNMP, that is not the case for all protocols (*koff*source routing*KOFF*).  There are some, most notably SMTP, for which reading RFCs is generally considered counterproductive.  I prefer good secondary sources for technical material - for IP I look to Stevens vol 1:

http://www.amazon.com/TCP-Illustrated-Protocols-Addison-Wesley-Professional/dp/0201633469/ref=sr_1_1?ie=UTF8&s=books&qid=1240007471&sr=8-1

	This touches, but does not elaborate on, the issue of fragmentation, at least for UDP (pg 148).  I'm overdue for a re-read, but the old rule of thumb to not rely on fragmentation to work is still sound advice.


	HTH,

Mike

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