What are the three functions of the fiber coating?

What are the three functions of the fiber coating?

• A. Protect, identify, and strength
• B. Protect, identify, and strengthen
• C. Protect, shield, and strength
• D. Protect, identify, and durability

Answer: (A)

The coating around an optical fiber has three roles: protect the glass, identify the fiber, and strengthen the strand. Protect means shielding the delicate silica from moisture, dust, and physical damage, helping to prevent cracks or losses from handling and environment. Identify comes from color coding or markings on the coating that let technicians distinguish fibers, routes, or batches. Strengthen refers to adding mechanical support so the fiber resists tension, bending, and breakage during installation and use. This phrasing—protect, identify, and strengthen—matches the standard description of the coating’s functions, which is why it’s the best fit. The other options either replace a key function with less standard terminology or use a broader or misaligned term, so they don’t capture the typical set of roles.

The coating around an optical fiber has three roles: protect the glass, identify the fiber, and strengthen the strand. Protect means shielding the delicate silica from moisture, dust, and physical damage, helping to prevent cracks or losses from handling and environment. Identify comes from color coding or markings on the coating that let technicians distinguish fibers, routes, or batches. Strengthen refers to adding mechanical support so the fiber resists tension, bending, and breakage during installation and use. This phrasing—protect, identify, and strengthen—matches the standard description of the coating’s functions, which is why it’s the best fit. The other options either replace a key function with less standard terminology or use a broader or misaligned term, so they don’t capture the typical set of roles.