Below is a screen shot of an IPConfig /all command:
The question from class is “What is the DUID?”
According to section 9 of RFC3315, DHCP servers use DUIDs to identify clients for the selection of configuration parameters and in the association of IAs with clients. An IA (Identity Association) is a collection of addresses assigned to a client. The DUID must be both unique in the environment and to be dynamically created. This is because some devices cannot store this information. For this reason, a DUID is generated in one of 3 ways. The link above contains more detailed information.
- Link-layer Address Plus Time
- Vendor-assigned unique ID based on Enterprise Number
- Link-Layer address