AZ-800 · Question #139
Your network contains an Active Directory Domain Services (AD DS) domain. The domain contains 10 servers that run Windows Server. The servers have static IPv4 addresses. You plan to use DHCP to…
The correct answer is D. MAC address. To ensure a server always receives the same IPv4 address from DHCP, a reservation must be created using a unique identifier tied to its network hardware.
Question
Your network contains an Active Directory Domain Services (AD DS) domain. The domain contains 10 servers that run Windows Server. The servers have static IPv4 addresses. You plan to use DHCP to assign IPv4 addresses to the servers. You need to ensure that each server always receives the same IPv4 address. Which type of identifier should you use to create a DHCP reservation for each server?
Options
- Afully qualified domain name (FQDN)
- Buniversally unique identifier (UUID)
- CNetBIOS name
- DMAC address
How the community answered
(47 responses)- A2% (1)
- B4% (2)
- C6% (3)
- D87% (41)
Why each option
To ensure a server always receives the same IPv4 address from DHCP, a reservation must be created using a unique identifier tied to its network hardware.
An FQDN is a hostname, which is a logical identifier and not directly used by DHCP servers to uniquely identify a client for a reservation, as multiple devices could potentially share an FQDN or it could change.
A UUID is a 128-bit number used for identifying information in computer systems but is not the standard or primary identifier used for DHCP reservations in this context.
A NetBIOS name is a logical identifier used for naming computers on a network, primarily in older Windows environments, and is not a hardware-level identifier for DHCP reservations.
DHCP reservations assign a specific IP address to a client based on a unique hardware identifier. The Media Access Control (MAC) address, also known as the physical address, is a unique identifier assigned to network interface cards (NICs) by their manufacturer and is used by DHCP servers to identify specific clients for reservations. When a DHCP client requests an IP address, it sends its MAC address, allowing the server to match it to a reservation and assign the predetermined IP.
Concept tested: DHCP reservation identifier
Source: https://learn.microsoft.com/en-us/windows-server/networking/technologies/dhcp/dhcp-deploy-manage
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