Which of the following cannot be the length of an IPv4 packet header? 03/14/2021 – by Mod_GuideK 0 Which of the following cannot be the length of an IPv4 packet header? A. 64B B. 60B C. 20B D. 32B SHOW ANSWERSCorrect Answer: A Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.