A network administrator is adding a new router into an existing OSPF network and notices that the router is stuck in the INIT state. What is a possible cause of this problem?

A network administrator is adding a new router into an existing OSPF network and notices that the router is stuck in the INIT state. What is a possible cause of this problem?

• Duplicate Router IDs are configured on the new router.
• An access list is blocking OSPF hellos.
• There is a mismatched interface MTU.
• Layer 2 switches between the two routers are not multicast aware.

Exam with this question: CCNP TSHOOT Chapter 7 Exam Answers (Version 7)