RIPv2 automatically summarizes IPv4 routes on classful boundaries. Which boundaries does it use for automatic summarization of IPv6 routes?
A. IPv6 is classless and automatic summarization is not done
B. Automatic summarization of IPv6 routes is disabled by default and the boundaries must be specified when it is enabled
C. Automatic summarization of IPv6 routes is done at the 32 bits (/32), 48 bits (/48), and 64 bits (/64) boundaries
D. IPv6 routes are automatically summarized on octet boundaries
