200-301 Question 71
Single answerA network administrator is tasked with designing a high-speed connection between two buildings that are 2 kilometers apart. The connection must support high bandwidth and have minimal signal loss. Which type of cabling should the administrator choose?
- A
Single-mode fiber
- B
Multimode fiber
- C
Cat6 Ethernet cable
- D
Coaxial cable
Show answer and explanation
Correct answer: A
Explanation
For a 2-kilometer high-speed connection between two buildings, single-mode fiber is the most appropriate choice. It is designed for long-distance communication with minimal signal loss and high bandwidth, whereas multimode fiber, Cat6 Ethernet, and coaxial cables are not suitable for this distance or performance requirement.
- A. Correct.
Single-mode fiber is ideal for long-distance connections (up to tens of kilometers) with minimal signal loss and high bandwidth, making it the best choice for this scenario.
- B. Incorrect.
Multimode fiber is better suited for shorter distances (usually up to 500 meters) due to its higher attenuation and modal dispersion over longer runs.
- C. Incorrect.
Cat6 Ethernet cable is limited to a maximum distance of 100 meters for standard Ethernet implementations, making it unsuitable for a 2-kilometer connection.
- D. Incorrect.
Coaxial cable is primarily used for shorter-distance applications, such as cable TV or internet services, and does not support the required bandwidth or distance.