Which two statements are true about the router ID in a single area OSPF network? (Choose two.)

Which two statements are true about the router ID in a single area OSPF network? (Choose two.)

• Only the DR and BDR have a router ID.
• A loopback interface is required to configure the router ID.
• The router ID is used to uniquely identify each router in the OSPF routing domain.
• Any interface, even one not participating in the OSPF routing process, can be used to determine the router ID.
• If no loopback interfaces are configured, the router chooses the highest active IP address of any of its physical interfaces.

Exam with this question: CCNA Exploration 2: ERouting Final Exam