3.1.b Identify, implement and troubleshoot IPv6 addressing and subnetting

The two all zeros

::/0 default address

::/128 unspecified

A Global Unicast is a unicast address that is globally unique (Aunicast address identifies a single device)

Link Local Unicast is an address whose scope is confined to a single link; non-routable

Anycast address represents a service rather than a device and often appears on multiple devices

Multicast addresses identify a set of devices; multicast group

A multicast packet has a unicast address as the source with a multicast address as it’s destination. A multicast address can never appear as a packet’s source address

The all nodes multicast is the same as ipv4 broadcast

http://www.cisco.com/en/US/docs/ios-xml/ios/ipv6_basic/configuration/15-mt/ip6-uni-routing.html#GUID-F02E803E-C395-484A-82B3-22F79CCB2279