Multimode step index fibers have a bandwidth of ___________a.10 to 40 MHz kmb.8 to 40 MHz kmc.6 to 50 MHz kmd.2 to 30 MHz km

To determine the bandwidth of multimode step index fibers, we need to refer to established data regarding their performance characteristics. Multimode step index fibers typically possess a bandwidth that varies based on the specific design and materials used, but general industry standards provide a useful reference.

1. Multimode Step Index Fiber Characteristics: These fibers allow multiple modes of light to propagate through the core. Their primary advantage lies in the ability to carry more data over short distances.

2. Common Bandwidth Range: The bandwidth of multimode step index fibers is commonly between 10 to 40 MHz·km, aligning with many practical applications in telecommunication and data transmission.

3. Conclusion: Based on the available choices and standard characteristics, the most accurate answer is:

   • a. 10 to 40 MHz km

Thus, the correct choice regarding the bandwidth of multimode step index fibers is option a.