The ST (Straight Tip) connector is an older style of Fiber optic connector that uses a bayonet-style coupling mechanism. In general, there are two main differences between singlemode and multimode connectors. This article provides a deep dive into these connectors, their differences, polishing styles, applications, and comparisons with other less common connectors such. They were among the first low-cost, high-performance connectors on the market and are primarily used in single-mode applications, though they also find use in some multimode networks.