200-301 Question 66
Single answerA network administrator is tasked with connecting two Cisco switches located 30 meters apart in a data center. The administrator needs to ensure high-speed communication of up to 10 Gbps while minimizing interference in an environment with high electromagnetic interference (EMI). Which type of physical interface and cabling should be chosen?
- A
RJ45 interface with Cat5e Ethernet cable
- B
RJ45 interface with Cat6 Ethernet cable
- C
SFP+ interface with fiber optic cable
- D
SFP+ interface with twinax cable
Show answer and explanation
Correct answer: C
Explanation
Fiber optic cables are the optimal solution for environments with high EMI and when high-speed communication is required over a distance of 30 meters. The SFP+ interface is suitable for supporting fiber optic connections at 10 Gbps, making this the best choice for the given scenario.
- A. Incorrect.
Cat5e Ethernet cables can support speeds up to 1 Gbps, which does not meet the 10 Gbps requirement. Additionally, they are more susceptible to EMI compared to fiber optic cables.
- B. Incorrect.
Cat6 Ethernet cables can support speeds up to 10 Gbps for distances up to 55 meters. However, they are still more susceptible to EMI compared to fiber optic cables, which is a critical factor in this environment.
- C. Correct.
Fiber optic cables are immune to EMI and can support high-speed communication, making them ideal for this scenario. The SFP+ interface is commonly used with fiber optic cables for high-speed connections.
- D. Incorrect.
Twinax cables are often used in short-distance connections for 10 Gbps, but they are less effective than fiber optic cables in environments with high EMI.