选项
A.
A.IPv6 address has 128 bits, while IPv4 address only has 32 bits
B.
B.The length of IPv6 head is fixed, while IPv4 head size is various
C.
C.Same as IPv4, IPv6 head has a field called “Protocol
D.
D.IPv6 head has a field called “Next Head”, while IPv4 has no such field
正确答案：C
名词解析
iPod发行版允许消费者随身携带他们完整的音乐库，格式也不依赖于脆弱和能源密集型的旋转圆盘。