Is it possible to unite two networks of different rank through a router?

Question

network hardware

Hi people. I was at an interview and got the following task: there are two networks, part of the nodes in the 10.xxx network is the second in the 192.168.0.x network, conditionally. There is a router and the need to connect these two networks. Question: what is needed for this. I assumed that the routing table needs to be set up. The answer turned out to be wrong, I turned out to be absolutely incompetent and I am not an engineer at all, according to the interviewee, and it turns out that without a gateway, nothing will work and will not work in this scheme. 1. How far am I from the truth? 2. On the assumption that, after all, most routers can also act as a gateway, it turned out to be, again, complete nonsense. Is it true?

Answer 1

Perhaps he wanted to hear from you that an L3 switch is needed, where it was necessary to configure vlans.
You should have asked this question to the one who told you that this is "not true." It was necessary to ask him: "And how then is it necessary?" and listen to what he said.
Read a series of articles "Networks for the smallest", it is on Habré. Maybe you'll learn something new. And this is a common practice in interviews.