How many usable hosts are available? 09/18/2018 – by Mod_GuideK 0 You have been allocated a /22 network. How many usable hosts are available? A. 510 B. 512 C. 1022 D. 1024 SHOW ANSWERSCorrect Answer: C Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.