What are the layers of a fiber cable from the inside going outward?

The correct answer accurately reflects the typical structure of a fiber optic cable, which consists of several distinct layers designed to protect the sensitive core and enhance performance. Starting from the innermost layer, the core is the central part of the fiber where the light signal travels. Surrounding the core, the cladding has a different refractive index, which helps to reflect the light back into the core, allowing for efficient signal transmission without loss over longer distances.

The buffer layer surrounds the cladding and serves to protect it from physical damage and environmental factors, as well as to minimize bending losses. The strengthener layer, often made of materials like aramid fibers (like Kevlar), provides additional support to the cable, helping to prevent damage from mechanical stress. Finally, the outer jacket is the external layer that protects the entire cable from environmental hazards such as moisture, chemicals, and abrasion, offering overall durability.

Understanding the arrangement of these layers is fundamental for anyone involved with installing or maintaining fiber optic networks, as each layer has a specific function that contributes to the cable's performance and resilience in various environments.