What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 using the EUI-64 process?

What would be the interface ID of an IPv6 enabled interface with a MAC address of 1C-6F-65-C2-BD-F8 using the EUI-64 process?

• A. 1C6F:65FF:FEC2:BDF8
• B. 1E6F:65FF:FEC2:BDF8
• C. 1E6F:67FF:FEC2:BDF8
• D. 1C6F:67FF:FEC2:BDF8

Answer: (B)

To determine the interface ID of an IPv6 enabled interface using the EUI-64 format, we start with the MAC address provided, which in this case is 1C-6F-65-C2-BD-F8. The first step in the EUI-64 process involves transforming the MAC address from a 48-bit format into a 64-bit format. 1. **Split the MAC Address**: The MAC address is split into two halves: the first half is 1C-6F-65, and the second half is C2-BD-F8. 2. **Insert FFFE**: Between these two halves, we insert the hexadecimal value FFFE. Hence, the new structure looks like this: - 1C-6F-65-FE-FE-C2-BD-F8 3. **Change the Universal/Local Bit**: The next step involves changing the 7th bit (the Universal/Local bit) of the first byte. The first byte of our MAC address in binary is: - 1C in hexadecimal is 00011100 in binary. Change the 7th bit from 0 (universal) to 1 (local): -

To determine the interface ID of an IPv6 enabled interface using the EUI-64 format, we start with the MAC address provided, which in this case is 1C-6F-65-C2-BD-F8. The first step in the EUI-64 process involves transforming the MAC address from a 48-bit format into a 64-bit format.

1. Split the MAC Address: The MAC address is split into two halves: the first half is 1C-6F-65, and the second half is C2-BD-F8.

2. Insert FFFE: Between these two halves, we insert the hexadecimal value FFFE. Hence, the new structure looks like this:

• 1C-6F-65-FE-FE-C2-BD-F8

3. Change the Universal/Local Bit: The next step involves changing the 7th bit (the Universal/Local bit) of the first byte. The first byte of our MAC address in binary is:

• 1C in hexadecimal is 00011100 in binary.

Change the 7th bit from 0 (universal) to 1 (local):