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Identifying IPv6 addresses.

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  • Identifying IPv6 addresses.

    2000::/3 Global Unicast
    These are like public IP addresses in IPv4. These are routable addresses.
    First three bits are 001::/3. Remaining can vary.
    FC00::/7 Unique Local
    These are also globally unique. But not routable. These addresses can be used for local lan.
    First seven bits are fixed. 1111 110::/7
    Remaining can vary.
    FE80::/10 Link Local
    These are non-routable IP addresses which are used with auto-configuration mode.
    FF00::/8 Multicast
    These are multicast addresses.
    ::1 Loopback
    :: unspecified ( DHCP request )
    3FFF:FFFF::/32 Reserved for examples and documentation.
    2001:0DB8::/32 Also reserved for examples and documentation.
    2002::/16 Tunneling
    Tunneling is used to pass IPv6 traffic through IPv4 network.

  • #2
    The IPv4 addresses we are all used to seeing are made up of four numerical octets that combine to form a 32-bit address. IPv6 addresses look nothing like IPv4 addresses. IPv6 addresses are 128 bits in length and are made up of hexadecimal characters.

    In IPv4, each octet consists of a decimal number ranging from 0 to 255. These numbers are typically separated by periods. In IPv6, addresses are expressed as a series of eight 4-character hexadecimal numbers, which represent 16 bits each (for a total of 128 bits). IPv6 addresses can sometimes be abbreviated in a way that allows them to be expressed with fewer characters.

    An example of an IPv6 address is: 2001:0db8:85a3:0000:0000:8a2e:0370:7334