Which area ID is used by OSPFv3 to identify the backbone area? 03/14/2021 – by Mod_GuideK 0 Which area ID is used by OSPFv3 to identify the backbone area? A. 0 B. 3 C. 2 D. 1 SHOW ANSWERSCorrect Answer: A Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.