JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 41

Which connection method do OSPF routers use to communicate with each other?

Answer options

• A. IP protocol number 89
• B. TCP port 179
• C. UDP port 179
• D. IP protocol number 6

Correct answer: C

Explanation

The correct answer is C, as OSPF utilizes UDP port 179 for its communication. Options A and D mention IP protocol numbers, which are not applicable to OSPF's operation. Option B refers to TCP port 179, which is not used by OSPF, as it operates over UDP.