A very large organization has received its IPv6 address range from its Internet Service Provider
and intends to use only IPv6 addresses internally. Employees will access the Internet using port
address translation. What is a requirement for their DNS servers?

A.
They no longer need DNS servers.

B.
Their DNS servers need to support both IPv4 and IPv6 addresses.

C.
Their DNS servers need to support only IPv6 addresses.

D.
Their DNS servers need to support only IPv4 addresses.

E.
They need additional DNS servers in their network just for IPv6 addresses.

F.
There are no changes required to their DNS servers.