What is an Ethernet cable used for?

• A. Connecting speakers to a computer
• B. Connecting computers in a network for data transfer
• C. Providing power to computers
• D. Transmitting wireless signals

Answer: (B)

An Ethernet cable is primarily designed for connecting devices within a local area network (LAN) to enable data transfer. This type of cable allows multiple computers, printers, and other networked devices to communicate with each other efficiently. It uses twisted pair cabling to transmit data over wired connections, which results in faster and more reliable communication compared to wireless methods. The Ethernet standard supports various speeds, including Fast Ethernet and Gigabit Ethernet, accommodating the needs of different networking environments.

Other options involve functionalities that are not inherent to Ethernet cables. For instance, connecting speakers to a computer typically requires audio cables or Bluetooth for wireless setups, rather than Ethernet. Additionally, while some technologies (like Power over Ethernet) can deliver power, standard Ethernet cables are not designed solely for powering devices. Lastly, Ethernet cables do not transmit wireless signals; instead, they use a physical connection to create a reliable network infrastructure.