Which components are used in outside plant fiber-optic cable to protect the optical fibers?

The correct choice highlights the essential components that provide protection to optical fibers in outside plant fiber-optic cables. Specifically, strength members and buffer tubes are crucial for ensuring the integrity and longevity of the optical fibers.

Strength members are typically made of materials with high tensile strength, such as fiberglass or steel, and are designed to support the cable's weight and protect against pulling forces during installation and environmental stressors. This structural integrity helps prevent mechanical damage to the delicate optical fibers contained within.

Buffer tubes are another vital component that encases groups of optical fibers. They serve a dual purpose: they provide a protective barrier against environmental factors such as moisture and physical impacts, and they also allow for some movement of the fibers to prevent stress on their delicate structure. By isolating the fibers from direct contact with the outer elements and allowing for differential expansion and contraction, buffer tubes help maintain the performance of the fiber-optic cable over time.

Other options, while relevant to fiber optics, do not serve as protective measures for the optical fibers within the context of outside plant applications. Fiber optic connectors and transceivers facilitate the connection and transmission of signals but do not protect the fibers themselves. Protective sheaths and insulating materials refer to broader categories of coverage that could apply to various cables