8. IPv6 Terminology

• Node: device that implements IPv6

• Router: node that forwards IPv6 packets

• Host: any node that isn't a router

• Upper layer: protocol layer immediately above IPv6

• Link: communication medium over which nodes communicate

• Subnet: one or more links with the same 64-bits address prefix

• Neighbor Nodes: network devices attached to the same link

• Interface: Node's attachment to the link

• Data Packet: IPv6 header + payload