[c-nsp] VLSM

[Pete Templin]

Hudson Delbert J Contr 61 CS/SCBN wrote:

> i know that the education of network guyz is outdated but some of the thingz
> being stated hear are knee jerk bandwagon jump-on..
> 
> 
> since when is a /16 size chunk of addresses not a class 'b' space.

In my book, ever since the beginning, when a class B was defined as a 
65,536 address chunk of space with a bit pattern starting with 10 and 
the first sixteen bits being significant to the "network" portion of the 
address.  Class A starts with 0 and has eight bits significant to the 
network, and class C starts with 110 and has 24 bits significant to the 
network portion.

When my sales droids and customers ask for a class C, they get told that 
we don't have any class C addresses available, but they can have an 
appropriate subnet of one of our ARIN allocations when they fill out a 
justification form.  We include a blurb about subnetting and slash 
notation in our handoff documentation, and make it available to our 
sales team on request.

pt