What is the default OSPF “hello interval”? 01/29/2021 – by Mod_GuideK 0 What is the default OSPF “hello interval”? A. 5 seconds B. 10 seconds C. 15 seconds D. 30 seconds SHOW ANSWERSCorrect Answer: B Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.