Could this be in a VLAN?

Question

Computer networks

I am quite new to networks and routers.
Can you help me understand VLAN? Let's say there are two subnets: 192.168.1.0 and 192.168.2.0. As far as I understand, VLAN makes it so that computers from the 192.168.1.0 subnet can see / access computers from the 192.168.2.0 subnet?
Those. in other words, with the help of VLAN, you can do without routing between subnets 192.168.1.0 and 192.168.2.0? Is it enough to specify the ID of these two networks, and they will see each other?

Answer 1

vlan isolates devices at the L2 level, roughly speaking, having a 24-port switch, you can make N virtual switches out of it using vlans. conditionally in vlan 100 you have ports 1-6, in 200 7-12, 300 13-18 ports. and all devices in them will work as in separate physical switches

Answer 2

Usually vlan is used exactly the opposite. For network isolation. So that 1 and 2 subnets would not even guess about the existence of each other.
And emnip networks will not see each other.

Answer 3

As you were already correctly told above, VLAN - L2
In order to make connected different L3 subnets without (almost without) routing - use NAT