Expected Outcome of EUI-64 Address Generation

# The Expected Outcome When an EUI-64 Address is Generated

### Question

What is the expected outcome when an EUI-64 address is generated?

### Explanations

Click on the arrows to vote for the correct answer

A. B. C. D.

C

When an EUI-64 address is generated, the expected outcome is that the interface ID of the IPv6 address is derived from the MAC address of the interface. EUI-64 stands for Extended Unique Identifier-64, and it is a method used to create IPv6 interface IDs.

The MAC address of a network interface card (NIC) is a globally unique identifier that consists of 48 bits. To create an EUI-64 address, the MAC address is modified to produce a 64-bit interface ID. This is done by inserting the characters "FFFE" in the middle of the MAC address and inverting the seventh bit of the MAC address.

Here is an example of how an EUI-64 address is generated:

Suppose the MAC address of a network interface is 00:11:22:33:44:55. To create an EUI-64 address, the following steps are taken:

1. The seventh bit of the MAC address is inverted. In this case, the seventh bit is a 0, so it is changed to a 1.

00:11:22:33:44:55 becomes 02:11:22:33:44:55

2. The characters "FFFE" are inserted in the middle of the MAC address.

02:11:22:FF:FE:33:44:55

3. The resulting 64-bit value becomes the interface ID of the IPv6 address.

2002:1111:2222:FFFE:3344:55FF:FE33:4455

So, the expected outcome when an EUI-64 address is generated is that the interface ID is derived from the MAC address of the interface, but with the modification of inserting "FFFE" and inverting the seventh bit. Option D, "The MAC address of the interface is used as the interface ID without modification" is incorrect.