The bandwidth of an OM1 multimode fiber is _____ MHz-km at 1300 nm.

The correct bandwidth for OM1 multimode fiber at 1300 nm is indeed classified as 500 MHz-km. This specification reflects the fiber's capability to transmit data across a distance with minimal signal degradation, which is crucial in telecommunications and data networking.

Understanding the bandwidth value is important for designing network systems. Different types of multimode fibers have varying bandwidth capacities based on their core sizes and mode field diameters. OM1 fibers, characterized by their larger core, provide adequate support for moderate data rates over short distances, making them suitable for specific applications like local area networks.

In contrast, other multimode fibers, such as OM2, OM3, and OM4, boast higher bandwidths, generally designed for more demanding applications requiring higher data rates and longer distances. Thus, knowing the characteristics of OM1 and its bandwidth at 1300 nm aids in making informed decisions when selecting the appropriate fiber optic cabling for a given application.