b) Choosing Between OM3 Fiber and OM4 Fiber: Explanation: Multimode optical fibers of types OM3 and OM4 both support wider bandwidths than OM1 and OM2 do. OM4 fiber is designed for higher-speed networks and offers better performance over longer distances. It is advised to select OM4 if the cost difference between OM3 and OM4 is not sizable and you are preparing for future scalability and higher data rates. Higher data rates and longer distances supported by OM4 fiber make it a better option for current and upcoming applications. c) Preference for OM4 over OM3: Explanation: Businesses may opt for OM4 fiber even when OM3 would suffice out of concern for future-proofing their infrastructure. OM4 provides better performance, more bandwidth, and longer ranges than OM3. By choosing OM4, businesses can guarantee that their network infrastructure can handle increasing bandwidth demands and higher data rates as technology advances. Although OM4 may initially cost a little more, the benefits of improved performance and future scalability frequently outweigh the cost