Alcatel-Lucent NRS I – Interior Routing Protocols and High Availability — Question 29

Which of the following conditions will prevent an OSPF adjacency from reaching the full state? Choose three answers.

Answer options

• A. MTU mismatch
• B. Incorrect subnet mask
• C. System interface not included in OSPF
• D. Area ID not the same
• E. Different metric set on each end of the link
• F. Router ID not defined

Correct answer: A, B, D

Explanation

An MTU mismatch, incorrect subnet mask, and differing Area IDs can all hinder OSPF from reaching a full adjacency state. Options C, E, and F do not directly prevent the full state, as OSPF can still function under certain configurations even if those conditions are present.