What is a router, and what kinds?

Smart routers, broadband routers, AC routers, I have confused so many routers, what is a broadband router? What is the difference between a broadband router and other routers? Most of these problems are estimated to be unclear. I am not using broadband routers now. I use smart routers now, which are easy to operate and perform well. I don't know much about broadband routers myself, I can only give you a basic knowledge. Broadband routers generally connect to the Internet through Ethernet ports connected to broadband modems such as ADSL and Cable MODEM. They also support direct connection to operators' broadband Ethernet access. Of course, they also support any other connection such as DDN conversion to Ethernet interface. And support routing protocols, such as static routing, RIP, RIPv2 and so on. Broadband routers have high, medium and low grades. The price of high-end enterprise-class broadband routers can reach thousands. The low-cost broadband routers have been reduced to 100 yuan, and their performance can basically meet the needs of families, school dormitories, offices, etc. The needs of the application environment have become one of the preferred products for networking in home and school dormitory users. Can be widely used in homes, schools, offices, Internet cafes, community access, government, enterprises and other occasions. A router is a device that connects a network between the unit and other units or the Internet. A broadband router is a device that supports multiple broadband access methods and allows multiple users or LANs to share the same account to achieve broadband access. Simply put, a broadband router can connect two lines from network service providers, such as China Unicom and China Netcom. This kind of line is a special line form, the connection is online, there is no dialing process, and the line is rented in the form of a monthly subscription. The intranet computer only needs a network card to connect to the switch, and then the switch is connected to the Ethernet port of the router. Broadband routers, to be careful, one or two sentences can not be said, through such a simple introduction, I think everyone has a basic understanding of broadband routers. Want to understand the broadband router in depth, it is still more than the information to look at.