Interface concepts:

• Interface concepts:

• An IPv6 address identifies an interface, not a node

• Two types of interfaces:

• A physical attachment (such as a network adapter)
• A logical attachment (such as a tunneling interface)

• The last 64 bits or 4 blocks of an IP address identify the interface.

• For a physical interface, Vista and XP use the MAC address to generate these 64 bits, but Windows 7 uses random generation.

• These last 64 bits are called the interface ID.