Unicast Addresses

• Global provider based

• Geographic based

• NSAP

• IPX Hierarchical

• Unspecified - 0:0

• Site-local use

• Link-local use

• IPv4-capable host

• Loopback - 0:0:0:0:0:0:0:1

Provider based

Special use address

010 Registry ID Provider ID Subscriber ID Subnet ID Interface ID

3 bits

n bits

m bits

o bits

p bits

128-mnop bits

Provider based

Subscriber prefix area ID subnet ID interface ID

(possibly IEEE 802.x MAC address)

Generic structure of an IPv6 address

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