Which of the following is NOT a feature of Ethernet?

The correct choice indicates that Ethernet does not primarily operate in wide area networks (WANs). Ethernet technology is designed mainly for local area networks (LANs), where it excels due to its high speed and reliability over limited geographical areas. While there are implementations of Ethernet that can extend across longer distances, such as Ethernet over fiber or WAN Ethernet services, the foundational design and most common usage of Ethernet technology occur within LANs.

In contrast, Ethernet's characteristics include supporting random access through methods like CSMA/CD (Carrier Sense Multiple Access with Collision Detection), which helps manage how data packets are sent and handled in a network to minimize collisions. The topology often implemented with Ethernet connections is the star topology, which involves connecting devices to a central switch or hub, enhancing network performance and reliability. These features illustrate why Ethernet is better suited for local networking rather than for broad area networks.