CCNA (200-120) 문제풀이 NO. 78

QUESTION 78

How is an EUI-64 format interface 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.

Explanation

문제 : EUI-64 형식의 인터페이스 ID는 48 비트 MAC 주소에서 어떤 방법으로 생성됩니까?

22번, 29번 문제와 거의 동일한 문제 입니다.

IPv6 주소 128bit는 Prefix 64bit와 Interface ID 64bit로 구성되는데 MAC주소 48bit 중간에 16bit(FF FE)를 추가해서Interface ID 64bit를 만드는 방식을

EUI-64 방식이라고 합니다.

정답은 D 입니다.