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by lolc
2785 days ago
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It tells you how many of the 32 bits in your IPv4 addresses are fixed. The rest belongs to your space. In binary, a /8 netmask would look like this:
11111111.00000000.00000000.00000000
and a /16 would look like this:
11111111.11111111.00000000.00000000 So 3.0.0.0/8 means only the first eight bits are fixed. Which gives Amazon 2^24 IP-Addresses to use (32-8 bit). That is huge because it's 1/256 of all available IPv4 addresses. It is small because it's only 16777216 addresses. |
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