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IPv4 == 32 bits 2**32
4,294,967,296
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IPv6 == 128 bits 2**128
340,282,366,920,938,463,463,374,607,431,768,211,456
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www.xxx.yyy.zzz
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aaaa:bbbb:cccc:dddd:eeee:ffff:gggg:hhhh
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:3: is shorthand for :0003: aka, leading zero can be omitted
:: is shorthand for :0000:
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127.0.0.1
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| Loopback |
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::1/128
0000:0000:0000:0000:0000:0000:0000:0001
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192.168.123.45
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| IPv4 Mapped into IPv6 |
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::ffff/96
::ffff:192.168.123.45/96
dot quad format
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| global Unicast |
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2000::/32 Teredo tunnels, gif
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| prefix of the first block of IPv6 production addresses |
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2001::/32 Teredo tunnels, gif
point-to-point tunnels (?)
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| Documentation Examples |
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2001:db8::/32
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| prefix of a 6-to-4 address |
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2002::/8 6to4 tunnels
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| prefix of a 6Bone address |
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3FFE:: used 1998-2006
.. do NOT use .. deprecated
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192.168.0.0/16
172.16.0.0/12
10.0.0.0/8
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| Unique Local Unicast Address |
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FC00::/7
FDEF::
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| Link Local Unicast |
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FE80::/10
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224.0.0.0/24
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| Multicast |
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FD00::/8
FF00::/8
iana.org Multicast Address
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