If a workstation has only IPv6 installed, which servers will it be unable to access?

The rationale behind the correct answer lies in the capabilities of IPv6. If a workstation has only IPv6 installed, it is compatible with any servers that are also running IPv6, which includes modern DHCP, DNS, and domain controller services.

In many environments, especially those that are transitioning to IPv6, it is not uncommon for servers to support both IPv4 and IPv6 simultaneously. Therefore, a workstation with only IPv6 will still be able to access servers that support this protocol.

This means that the workstation will be able to communicate with DHCP servers providing IPv6 addresses, domain controllers for user authentication and access control, and DNS servers that resolve domain names to IPv6 addresses. Thus, it can reach the necessary services as long as those servers are IPv6-capable.

In summary, since the workstation can interact with any Django servers operating on the IPv6 protocol, it is indeed capable of accessing all necessary servers, which validates the answer that it can access no servers in general indicates a misunderstanding of the compatibility of IPv6 in a networked environment.