What do hybrid cables contain according to the references?

Hybrid cables are designed to be versatile by containing both singlemode and multimode optical fibers. This dual-fiber configuration allows for flexibility in network design, enabling the optimization of different types of data transmission. Singlemode fibers are ideal for long-distance communication due to their low attenuation and high bandwidth capabilities, while multimode fibers are better suited for short-distance applications where higher data rates are required over shorter spans.

By combining both types of fibers within a single cable, hybrid cables can cater to a range of networking requirements, making them suitable for various applications, such as connecting different types of equipment or facilitating different transmission methods within the same infrastructure. This feature is valuable in environments such as data centers or telecommunications networks, where both types of fiber may be needed to support different systems.