This is not right. There are only three RANGES specified in RFC 1918:
10.0.0.0 - 10.255.255.255 (10/8 prefix)
172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
From RFC1918:
We will refer to the first block as "24-bit block", the second as
"20-bit block", and to the third as "16-bit" block. Note that (in
pre-CIDR notation) the first block is nothing but a single class A
network number, while the second block is a set of 16 contiguous
class B network numbers, and third block is a set of 256 contiguous
class C network numbers.
Can someone explain what this is really asking and how they came up with the answer? To me there are just three ranges (one for each class). Not understanding this one.
It has to do with the number of 'blocks' in each range. Class 1 only includes the one, the Class B range includes 16 'Class B' subnets, and the Class C range includes 256 'Class C' subnets.
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