220-1101 Question 203
Single answerMultimodeA technician is upgrading a building's internal network and must connect two wiring closets that are 220 meters apart. The existing plan specifies fiber between the closets, and the technician wants a solution commonly used for short-to-medium distances inside buildings at a reasonable cost. Which type of cabling should the technician choose?
- A
Multimode fiber
- B
Single-mode fiber
- C
Cat 6 UTP
- D
RG-6 coaxial cable
Show answer and explanation
Correct answer: A
Explanation
For A+ Core 1, candidates should know that multimode fiber is typically used for shorter-distance network links, especially within buildings or campuses, while single-mode fiber is used for longer distances. In this scenario, the run is longer than copper Ethernet allows but still well suited to multimode fiber, making it the most practical and cost-conscious choice. This aligns with standard networking best practices and common structured cabling guidance: use twisted-pair copper for typical workstation runs up to 100 meters, multimode fiber for shorter building backbone connections, and single-mode fiber for much longer links.
- A. Correct.
Correct. Multimode fiber is commonly used for shorter-distance backbone links within buildings and campuses. A 220-meter run between wiring closets is a realistic use case for multimode fiber, which is generally less expensive than single-mode optics for these shorter distances. On A+ Core 1, multimode is associated with shorter runs and LAN/backbone connections inside facilities.
- B. Incorrect.
Incorrect. Single-mode fiber supports much longer distances and higher-bandwidth long-haul links, but it is typically chosen when the distance exceeds what multimode can efficiently support or when long-distance backbone connections are required. While it could work technically, it is not the most appropriate or cost-effective choice for this in-building 220-meter run.
- C. Incorrect.
Incorrect. Cat 6 UTP Ethernet cabling has a maximum standard segment length of 100 meters for twisted-pair Ethernet runs. At 220 meters, this exceeds the supported distance and would not be appropriate without additional active equipment between segments.
- D. Incorrect.
Incorrect. RG-6 coaxial cable is commonly associated with cable television, cable modems, and some broadband applications, not standard modern Ethernet backbone links between wiring closets. It is not the appropriate choice for this fiber-based inter-closet network upgrade.