Which two Layer 2 protocols are supported on MX Series devices? 06/13/2017 – by Mod_GuideK 0 Which two Layer 2 protocols are supported on MX Series devices? (Choose two.) A. BGP B. RIP C. RSTP D. MSTP SHOW ANSWERSCorrect Answer: CD Explanation/Reference: Download Printable PDF. VALID exam to help you PASS.