Final answer:
The claim that a computer needs both a link-local and a global IPv6 address to access the internet is FALSE. A Global IPv6 address alone is sufficient for internet connectivity, while a link-local address is used within a local network.
Step-by-step explanation:
The statement that a computer needs both a link-local IPv6 address and a Global IPv6 address to get on the internet is FALSE.
A link-local IPv6 address is used for communication within the same local network segment or the link. It is not routable beyond its local subnet, and therefore it's not sufficient for accessing the internet. On the other hand, a Global IPv6 address is globally unique and is used to access the internet.
While it is critical for full internet connectivity, being able to access the internet does not necessarily require both types of addresses simultaneously. A computer can connect to the internet using just a valid global IPv6 address.
However, having both types of addresses may be part of normal operation wherein the link-local address is used for local network tasks and the global address for internet access.