So, 2 ohm stereo stable means that in stereo mode (two channels) it can play as low as 2 ohms. 4 ohm stable bridged means that when you bridge the amp (combine the channels, also called mono) it can only play to 4 ohms.
Definition: Wireless (or wi-fi) hotspots are essentially wireless access points providing network and/or Internet access to mobile devices like your laptop or smartphone, typically in public locations. Wi-Fi Hotspot Security-Before You Connect to a Wi-Fi Hotspot. 2  International Wireless Internet Service: Wi-Fi Internet Access On the Go. 3  Mobile Internet Access Comparison: 3G, Wi-Fi, & Other Internet on the Go Options. 4  Wireless Networking FAQs for Mobile Workers.
Wi-Fi is a term for a network, almost always one that shares an Internet connection. Any mobile device that supports connecting to the Internet has Wi-Fi capabilities, and free Wi-Fi just means it's unsecure.