How to find out what sites are viewed by a network user connected to the Internet through the same router as you?

Question

Computer networks

They gave me an assignment at the institute. The essence of the task is to find out if there is a way to find out what sites a person is watching right now, provided that he is connected to the Internet through the same router as you. Access to the router and its settings, of course, is.

Answer 1

1) ptraffer on ubuntu + DHCP gate change
2) online ptraffer + ARP spoofing (say via Cain and Abel)

Answer 2

They gave me an assignment at the institute.

Assignments at the institute are given for the purpose of learning. Have you tried studying?
Well, there is literature on the subject to read, google?
The answer to your question is simply searched by a search engine.

Answer 3

on the router you need to look through a sniffer or syslog

Answer 4

You can also run the router through a proxy and watch its logs