Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 245

Which reason could cause an OSPF neighborship to be in the EXSTART/EXCHANGE state?

Answer options

• A. mismatched OSPF link costs
• B. mismatched OSPF network type
• C. mismatched areas
• D. mismatched MTU size

Correct answer: D

Explanation

The EXSTART/EXCHANGE state in OSPF indicates that the routers are attempting to establish a relationship but have a discrepancy in the MTU size, which prevents them from agreeing on the size of the packets they can send. The other options, while they can cause issues in OSPF, do not specifically relate to the EXSTART/EXCHANGE state.