Date: Mon, 20 Mar 1995 11:21:12 -0600 (CST) From: karl@mcs.com (Karl Denninger) To: nanog@merit.edu
Taking a relatively small chunk of the remaining address space (say, 210.*.*.*) gives us 64k addresses to hand out in convenient
That's 16M addresses, not 64K addresses. We should not equivocate "addre sses" and "Class C networks". 210.*.*.* has 2^24 (minus subnet zero and broadc ast lossage) addresses -- 16M. 210.*.*.* has 2^16 "Class C networks" -- 64K. We must not assume that every customer will get a Class C -- many will get j ust a subnet since they will only have a handful of hosts. I know of several providers who are chopping things up on nybble boundaries (16 hosts/net, or actually 14 with the subnet zero and broadcast taken out).
Not me!
I consider a "Class B equivalent" to be 256 NETWORKS, by the common use of the term, but 65K *addresses*.
1 Class-B-sized prefix = 256 Class-C-sized prefixes. A "network" could be a Class A, B, C, etc., network, or a CIDR network, etc.
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