Hostname command shows all IP addresses except Loopback. Hostname -I option displays all connected network interfaces. Hostname command may not be available in all Linux distributions
Check router lights: power, WAN, LAN, WLAN should be on. Enter http://192.168.10.1 in browser address bar. Default username and password is usually "admin"
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
WiFi Analyzer app needed to display router's IP address. App shows connected router at top of list with IP at bottom
Windows 11: Settings > Bluetooth & devices > Printers & Scanners > General. Windows 10: Control Panel > Hardware and Sound > Devices and Printers. Command Prompt method: ping router and view connected devices
Ethernet speeds typically range from 100 Mbps to 1 Gbps. Defective or broken cables can cause sudden speed changes. Not all Ethernet adapters support 1 Gbps or higher speeds. Older routers may only support up to 100 Mbps