- Unicast: one-to-one
- Multicast: one-to-many
- Anycast: one-to-closest. Not a replacement for broadcast.
Address Scope Types:
- Link-local scope address: Layer 2 domain – auto generated by the device.
- Unique/Site-Local scope address: Organisation – equivient of private IPv4 address. NO LONGER USED!
- Global Scope Address: Internet
