Topic: "Understanding IP Addressing" document terminology
The OpenBSD FAQ suggest reading:
and I'm having a hard time understanding their use of 2 number in which one is in parenthesis, can you help me?
On pg. 11 they say:
"...if an organization needs nine subnets, 23 (or 8) will not provide
enough subnet addressing space, so the network administrator will
need to round up to 24 (or 16)."
23 or 8 what? 24 (or 16) looks like it would be describing alternatives for either a class A or class B network, in which 8 bits are used to extend the prefix, but that must be wrong, since I don't see how that relates to alternatives 23 or 8.
If you had network address:
172.16.0.0/16 with subnet mask 255.255.254.0
This would be a prefix length of 23, correct? So that would give me 254 subnets each with 510 hosts, I think.
What is the relationship between 23 and 8 in their example?