Which fiber optic cable component provides tensile strength?

• A. Aramid Strength Members
• B. Primary Buffer Coating
• C. Jacket
• D. Glass Fiber

Answer: (A)

Tensile strength in fiber optic cables comes from the aramid strength members. These strong synthetic fibers, like Kevlar, are placed around or near the glass core to absorb and distribute pulling forces when the cable is installed or tensions occur. The glass fiber itself is brittle and cannot withstand much tension, so it’s protected by these strength members. The primary buffer coating protects the glass from moisture and microbends but isn’t meant to carry load, and the outer jacket provides environmental and abrasion protection rather than bearing tensile stress.