Various "Networks" that make me struggle"

The various "networks" that I am struggling with have always thought that my home ADSL Broadband Internet access (that is, using telephone lines) is Ethernet. In fact, this is a WAN Based on the ppp protocol, today I am looking for explanations from various networks. Note: Internet: the Internet of independent computers. The Internet is not a single computer network. It is a collection of interconnected networks, that is to say, a global network composed of many networks is called the "Internet ". Wide Area Network (WAN): a computer network that covers more than 10 thousand meters and spans a large region. Lan: it is a dedicated computer network in the same building or a radius of several thousand meters. Ethernet: the most widely used computer LAN technology. It is a bus-based, broadcast-type local area network. From the concept, we can see the difference. First, the Internet is the largest network. The Wan is included in the Internet, and the LAN is smaller than the WAN, which is also included in the Internet. Ethernet is a technology and a technology used for LAN.