Which area is reserved for the OSPF backbone? 05/22/2020 – by Mod_GuideK 0 Which area is reserved for the OSPF backbone? A. Area 0.0.0.0 B. Area 1.1.1.1 C. Area 2.2.2.2 D. Area 3.3.3.3 SHOW ANSWERSCorrect Answer: A Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.