How many bytes of overhead forms an IP-IP tunnel add to a packet? 05/22/2020 – by Mod_GuideK 0 How many bytes of overhead forms an IP-IP tunnel add to a packet? A. 20 bytes B. 24 bytes C. 28 bytes D. 14 bytes SHOW ANSWERSCorrect Answer: A Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.