Which type of optical fiber cable consists of multiple 900 µm tight-buffered strands under a single jacket?

The type of optical fiber cable that consists of multiple 900 µm tight-buffered strands under a single jacket is indeed distribution cable. Distribution cables typically contain multiple tight-buffered fibers within a single protective outer jacket, which makes them suitable for use in indoor environments where flexibility and ease of handling are crucial. This design allows for easy installation and termination in structured cabling systems.

Distribution cables are commonly used in various applications, including connecting end-user devices to network switches and as "drops" to terminal points. They can accommodate multiple fibers, thus supporting a variety of connections while maintaining organizational efficiency.

The other types of cables mentioned serve different purposes. For instance, simplex cables consist of a single fiber strand, which limits their use to point-to-point applications. Ruggedized cables are designed for outdoor or harsh environments but do not specifically indicate the number of fibers or tight-buffering. Single-mode cables pertain to a specific type of fiber that allows only one mode of light to propagate, typically used for long-distance communications, rather than focusing on the structure involving multiple fibers.