这题没看懂，求讲解下

ui8

How is an EUI-64 format inte**ce ID created from a 48-bit MAC address?
A. by appending 0xFF to the MAC address
B. by prefixing the MAC address with 0xFFEE
C. by prefixing the MAC address with 0xFF and appending 0xFF to it
D. by inserting 0xFFFE between the upper three bytes and the lower three bytes of the MAC address
E. by prefixing the MAC address with 0xF and inserting 0xFafter each of its first three bytes
Answer: D

丁芊芊

EUI-64 是生成ipv6地址的一种方法，ipv6中128位地址后64位由mac地址改变而来
在48位mac地址的前3个字节和后3个字节之间插入0xFFFE