Three kinds of unicast addresses:

• Three kinds of unicast addresses:

• A global unicast address can be used on the Internet (similar to public IP addresses)

• A link-local unicast address is used on the local link (similar to private IP addresses)

• A unique local unicast address is used on multiple local links within an intranet. (A hybrid between a global unicast and a link-local unicast address, routable on the intranet but not routable on the Internet)

• Note: The first 48 bits or 3 blocks of a global unicast address specifies the organization’s site. (publicly leased bits from IANA)