单项选择题
Which statement about IPv6 is true?（）
A. Addresses are not hierarchical and are assigned at random. B. Only one IPv6 address can exist on a given interface. C. There are 2.7 billion addresses available. D. Broadcasts have been eliminated and replaced with multicasts.
单项选择题 Which statement about RIPng is true?（）
单项选择题 Which term describes the process of encapsulating IPv6 packets inside IPv4 packets?（）
单项选择题 What is the first 24 bits in a MAC address called?（）
