200-301 Question 340
Single answerA network engineer is configuring a point-to-point connection between two routers using a serial interface. They want to ensure minimal overhead and compatibility with most networking devices. Which WAN encapsulation protocol should they use?
- A
PPP (Point-to-Point Protocol)
- B
HDLC (High-Level Data Link Control)
- C
Frame Relay
- D
MPLS (Multiprotocol Label Switching)
Show answer and explanation
Correct answer: B
Explanation
HDLC is the default and most efficient encapsulation protocol for point-to-point serial links on Cisco routers. It provides minimal overhead and broad compatibility, making it the best choice for this scenario. While PPP is also an option, it introduces additional features and overhead that may not be necessary for a simple point-to-point connection.
- A. Incorrect.
PPP is a widely used encapsulation protocol for point-to-point connections and supports authentication and multilink, but it introduces more overhead compared to HDLC.
- B. Correct.
HDLC is the default encapsulation protocol for serial point-to-point links on Cisco routers. It is simple and efficient, making it suitable for minimal overhead and compatibility.
- C. Incorrect.
Frame Relay is a WAN technology that operates over shared networks, not a true point-to-point protocol. It is not applicable in this scenario.
- D. Incorrect.
MPLS is a high-performance technology for directing data packets, but it is not a point-to-point encapsulation protocol and is more complex than required in this scenario.