A network technician observes an automatically configured Link-Local IPv6 address of FE80::0250:56FF:FE9A:BCDE on a server's network interface using SLAAC and EUI-64. Based on standard EUI-64 interface identifier rules, which two statements regarding this interface's physical MAC address and link-local generation process are correct? (Select two.)
- The original burned-in MAC address of the interface is 00:50:56:9A:BC:DE.Cevap
- The 7th bit (Universal/Local bit) of the MAC address's first byte was inverted from 0 to 1 during EUI-64 processing to indicate a modified interface ID.Cevap
- CThe original burned-in MAC address of the interface is 02:50:56:9A:BC:DE.
- DThe EUI-64 process inserted the hex sequence FFFF into the exact midpoint of the 48-bit MAC address.
Cevap
The original burned-in MAC address of the interface is 00:50:56:9A:BC:DE, and the 7th bit (Universal/Local bit) of the MAC address's first byte was inverted from 0 to 1 during EUI-64 processing.
The link-local IPv6 address FE80::0250:56FF:FE9A:BCDE uses an EUI-64 interface identifier created from a 48-bit MAC address. EUI-64 inserts the hexadecimal value FFFE into the middle of the MAC address (between the 3rd and 4th bytes) and flips the 7th bit of the first byte (the Universal/Local bit). Reversing this process on 0250:56FF:FE9A:BCDE requires removing FFFE to leave 02:50:56:9A:BC:DE, and flipping the 7th bit of the first byte 02 (0000 0010 in binary) back to 0, which gives 00 (0000 0000 in binary). Thus, the original MAC address is 00:50:56:9A:BC:DE, and the 7th bit was inverted from 0 to 1 during the process.
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EUI-64 Interface Identifier Derivation