Extension cord is a flexible electrical cable with plug and sockets. Length ranges from 2 to 30 feet, up to 300 feet. Term "extension cord" used since at least 1925. Available in various colors, lengths, thicknesses and service duties
Ethernet port enables wired connections between devices and networks. Commonly found on computers, laptops, routers, and gaming consoles. Uses RJ45 connector for secure cable connections
Loose cable connections can cause speed drops even on Gigabit Ethernet. Cat5 cables limit speeds to 100 Mbps, Cat5e can reach 1000 Mbps. RJ45 connectors may need replacement if cable is routed internally
USB drives connect directly to computer's USB ports. Most drives have USB-A (rectangular) or USB-C (oval) connectors. Ports are typically located on laptop sides or desktop front/rear. USB-A ports are directional, USB-C ports are non-directional
Red wire is positive, black wire is negative. White stripe indicates negative wire, plain black wire is positive. DC power flows in one direction, common in batteries and electronics
HDMI ARC enables audio transfer between TV and external devices through single cable. Supports Dolby Digital and surround sound formats. Eliminates need for separate audio and video cables