What are two differences between optical-fiber cabling and copper (CCNA 200-301)

Correct answer: B) The glass core component is encased in a cladding and D) Light is transmitted through the core of the fiber.
In optical-fiber cabling, the core component, typically made of glass or plastic, is encased in a cladding, which helps to guide the light signals by reflecting them back into the core. This structure enables the transmission of light signals through the fiber.
Light signals are transmitted through the core of the optical fiber, while in copper cabling, electrical signals (typically carried by electrons) pass through the copper conductors. Copper cabling does not use light for transmission.