Certified Fiber Optics Practice Exam

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What type of fiber is typically associated with OM1 connectors?

50/125 um
62.5/125 um
100/140 um
50/140 um

The correct answer is: 62.5/125 um

OM1 connectors are typically associated with multimode fiber that has a core diameter of 62.5 micrometers and a cladding diameter of 125 micrometers. This type of fiber was commonly used in older network installations, especially during the rise of fiber optics in the 1990s and early 2000s. The larger core size of 62.5/125 micrometers allows for a greater volume of light to enter the fiber, making it suitable for short-distance applications such as local area networks (LANs). The designation of OM1 refers specifically to this type of multimode fiber, which supports transmission rates of up to 1 Gbps for distances up to 275 meters and is popular for legacy applications needing cost-effective solutions for data transmission over shorter distances. Understanding this standard is crucial for professionals working with fiber optics, as it helps in selecting the appropriate fiber type and ensures compatibility with fiber optic network components.