Cisco Certified Network Associate (CCNA) Practice Exam

Which statement accurately describes fiber optic Ethernet?

1. Offers high performance, electrical isolation, and wide distance

2. Can deliver high performance over distances of tens of kilometers

3. Conforms to already-installed, twisted pair telephone wiring

4. Was the original concept of computers communicating over Ethernet

The correct answer is: Offers high performance, electrical isolation, and wide distance

The statement that fiber optic Ethernet offers high performance, electrical isolation, and wide distance accurately describes the technology's key advantages. Fiber optic Ethernet utilizes light to transmit data, which allows for extremely high bandwidth and performance compared to traditional copper-based systems. This technology can achieve significantly longer transmission distances without the loss of signal quality found in electrical transmission methods. Additionally, the component of electrical isolation is particularly important as fiber optics are immune to electromagnetic interference, making them ideal for environments with high electrical noise. This isolation further enhances the stability and reliability of the data transmission when using fiber optic cables. Other statements do not capture the essence of fiber optic Ethernet as comprehensively. While fiber can indeed deliver high performance over long distances, the focus of the chosen statement is broader and includes factors such as electrical isolation, which is a critical characteristic of fiber optic technology.