LAN cable network connectivity involves using physical Ethernet (twisted-pair or fiber) cables to link devices like computers, routers, and switches within a localized area. Featuring RJ45 connectors, these cables provide a stable, secure, and fast, high-speed, low-interference connection compared to Wi-Fi. They enable data transmission across distances, with categories (e.g., Cat5e, Cat6) supporting speeds from 1 Gbps up to 10 gbps.