The document discusses different types of network connections including Ethernet, wireless internet (Wi-Fi), 3G, and 4G. Ethernet uses wired connections to link computers in a local area network, while wireless internet allows devices to connect to a network without cables using IEEE 802.11 standards. 3G and 4G are mobile data standards that allow devices to connect to the internet from anywhere, with 4G being significantly faster than 3G and able to support more bandwidth-intensive activities like video streaming.