What technology connects computers together in a local area network?

• A. Modem
• B. Router
• C. Ethernet
• D. Network adapter

Answer: (C)

The technology that connects computers together in a local area network (LAN) is Ethernet. Ethernet refers to a family of networking technologies that provide a common method for computers to communicate over a wired network. It defines the physical layer and data link layer of the network, enabling devices to exchange data through cables.

Ethernet works by using packet switching, where data is broken down into manageable packets and sent over the network to the intended device. This technology supports various speeds, making it suitable for different network sizes and requirements. Additionally, Ethernet is widely adopted due to its reliability, scalability, and cost-effectiveness, making it the cornerstone of most local area networks.

While other options like a modem and router play roles in connecting networks to the internet or directing traffic within a network, they do not specifically define the technology that connects computers within a local area network. A network adapter, on the other hand, is the hardware component in each computer that enables it to connect to the Ethernet network, but it is not the overarching technology used for connecting multiple computers together.