CISCO CCNA Exam – Q52 Refer to the exhibit. Which WAN protocol is being used? A. ATM B. HDLC C. Frame Relay D. PPP Show Answer Correct Answer: C Explanation: This question is to examine the show int command. According to the information provided in the exhibit, we can know that the data link protocol used in this network is the Frame Relay protocol. “LMI enq sent…”