NETGEAR Universal Wi-Fi Dual-Band Range Extender with 4-Port Ethernet Switch Black WN2500RP-100NAS - Best Buy
Amazon.com: Amake WiFi Extender,WiFi Booster, WiFi Repeater - Coverage up to 2640sq.ft and 25 Devices, Internet Booster,Quick Setup, Home Wireless Signal Booster,Easy 1-Tap Setup : Electronics
Network Devices (Repeater, hub, bridge, switch, router and gateway) in Hindi with English subtitles - YouTube
Explain in detail repeater, hub, bridges, routers, gateway, switches.