I have 2 subnets within my office: 172.16.1.0/24 and 172.16.2.0/24. All devices on each subnet are wired independently from each other into the server closet. Previously each subnet had it's own switch in the closet to connect to that subnets servers. We are replacing the 2 switches with a single Dell 2816 managed switch.
Is there a benefit to setting up the switch with 2 VLANs over just letting everything pass through the switch in unmanaged mode?
My only security concern is this: 1 subnet has access to the internet while the other does not. Does setting up 2 VLANs provide additional security by helping prevent 1 subnet from accessing the other? In other words, if a computer with internet access gets hacked will it being on one side of a VLAN help prevent the hacker from accessing the other subnet?