Final answer:
Every IPv6 network host has a Device Unique Identifier (DUID), which is true. The DUID is used for host identification in DHCPv6 and is designed to be a permanent identifier unlike MAC addresses in IPv4.
Step-by-step explanation:
The statement is TRUE. Every host in an IPv6 network has a Device Unique Identifier (DUID), which is used for the identification of the host in the Dynamic Host Configuration Protocol for IPv6 (DHCPv6). Unlike the Media Access Control (MAC) address that is used in IPv4, which is tied to the network interface of the device, the DUID is a unique identifier associated with the device itself, regardless of the network interface.
DUIDs are designed to be permanent and to not change over time, although there are configurations where a DUID can be regenerated or modified under certain circumstances. They are critical in IPv6 networks for managing network configurations and ensuring that each device can be uniquely identified for purposes of assigning network parameters like IP addresses and DNS settings through DHCPv6.