A network administrator is reviewing interface addressing rules and EUI-64 auto-configuration for an enterprise IPv6 rollout. Which two statements regarding IPv6 addressing characteristics and EUI-64 generation are correct? (Choose two.)
- The 7th bit of the MAC address's first octet (the Universal/Local bit) is inverted when constructing the 64-bit interface identifier.Cevap
- The 16-bit hex value `FFFE` is inserted directly between the third and fourth octets (the middle) of the 48-bit MAC address.Cevap
- CThe 16-bit hex value `FFFE` is inserted between the first and second octets of the 48-bit MAC address to form the EUI-64 address.
- DAn IPv6 `/64` subnet requires subtracting 2 host addresses from because IPv6 maintains traditional IPv4 network ID and broadcast address reservations.
Cevap
The two correct statements are: (1) The 7th bit of the MAC address's first octet (the Universal/Local bit) is inverted when constructing the 64-bit interface identifier, and (2) The 16-bit hex value `FFFE` is inserted directly between the third and fourth octets (the middle) of the 48-bit MAC address.
The EUI-64 process takes a 48-bit MAC address, splits it into two 24-bit sections, inserts `FFFE` in the middle between the third and fourth octets, and flips the 7th bit (Universal/Local bit) of the first byte. Thus, both statements describing these EUI-64 steps are correct.
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Modified EUI-64 Interface Identifier Generation and IPv6 Address Structure