Hello, if the router is connected to broadband, should I set the router address to the ip purchased from the telecom company?

First, you have to figure out the router and the cat.

When you install broadband, telecom usually gives you a cat, and then you connect your router to the cat.

The default IP address of a router is generally 192. 168. 1. There is no need to set IP, and the router will automatically obtain the IP address assigned by the telecom.