Final answer:
Nodes with IPv6 link-local addresses communicate directly with each other over a local network without the need for routers or global addresses.
Step-by-step explanation:
In an IPv6 network, nodes with link-local addresses typically communicate with each other by relying on a local network for communication. This means that these nodes can communicate directly over the local network segment they are connected to without the need for an intermediary, such as a router or using global addresses. Link-local addresses in IPv6 are unique to the local network segment and cannot be used to communicate over the internet or through different subnets.
Therefore, the correct answer to the question is:
C) They rely on a local network for communication