Which type of protocol encapsulation do IP-over-DWDM interfaces feature? 01/22/2017 – by Mod_GuideK 0 Which type of protocol encapsulation do IP-over-DWDM interfaces feature? A. G.853 B. G.709 C. SONET/SDH D. ATM SHOW ANSWERSCorrect Answer: B Explanation/Reference: up-to-date.