CCNA: Cisco Certified Network Associate — Question 1235

What are two differences between optical-fiber cabling and copper cabling? (Choose two.)

Answer options

• A. A BNC connector is used for fiber connections
• B. The glass core component is encased in a cladding
• C. The data can pass through the cladding
• D. Light is transmitted through the core of the fiber
• E. Fiber connects to physical interfaces using RJ-45 connections

Correct answer: B, D

Explanation

The correct answers are B and D because optical fiber cabling uses a glass core that is protected by cladding, allowing light to transmit through the core. Option A is incorrect as BNC connectors are not used for fiber; Option C is wrong since data does not pass through the cladding; and option E is incorrect as fiber typically does not use RJ-45 connections.