Which CIDR notation is the equivalent of the subnet mask of 255.255.192.0? 09/18/2018 – by Mod_GuideK 0 Which CIDR notation is the equivalent of the subnet mask of 255.255.192.0? A. /18 B. /19 C. /17 D. /20 SHOW ANSWERSCorrect Answer: A Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.