200-301 Question 65
Single answerAn organization is setting up a new office and needs to connect its network devices. The IT team is tasked with selecting the appropriate cabling and interface types for different scenarios. Which of the following pairs of physical interfaces and cabling types would be most appropriate for connecting a switch to a high-speed backbone router located 30 meters away?
- A
RJ45 interface with Cat 5e UTP cable
- B
RJ45 interface with Cat 6 UTP cable
- C
SFP interface with single-mode fiber cable
- D
SFP+ interface with multimode fiber cable
Show answer and explanation
Correct answer: D
Explanation
In this scenario, the connection between the switch and the backbone router requires a high-speed link suitable for enterprise environments. SFP+ with multimode fiber cable is the best choice as it supports high-speed data transfer (10 Gbps or higher) over short distances such as 30 meters. Other options either do not meet the speed requirements or are designed for longer distances, making them less suitable for this use case.
- A. Incorrect.
RJ45 with Cat 5e UTP cable is suitable for Ethernet connections up to 1 Gbps over short distances but not ideal for high-speed backbone connections.
- B. Incorrect.
RJ45 with Cat 6 UTP cable supports up to 10 Gbps over short distances (up to 55m), but it is not typically used for high-speed backbone connections in enterprise environments.
- C. Incorrect.
SFP with single-mode fiber cable is designed for long-distance connections (up to several kilometers), making it unnecessary for a 30-meter connection.
- D. Correct.
SFP+ interface with multimode fiber cable is optimized for high-speed connections (10 Gbps or higher) over short distances, making it the most appropriate choice for connecting a switch to a backbone router within 30 meters.