I am just learning on a 2948G managed switch. I have 48 ports and I would like to divide those up into 4 networks with 12 ports each. I don't want them to be able to communicate between networks at all as a security measure.
I know I have a lot of questions and I have tried to read and understand these on my own. I have put the more important questions at the top if you can answer any of them I would appreciate it!
I am trying to understand the difference between VLAN and trunking and etherchannel and which one would do what I am trying to do above. It sounds like VLAN might be it, but isn't that about the same as just letting the connected devices assign static IPs in the same range? Or does setting it up as a VLAN ensure that none of the devices try to change their IP to connect to another port in another subnet that I don't want it to access?
Does trunking in effect connect those separate networks? For instance, if network A has ports 1-12 and network B 13-24, would port 3 and 18 still be able to communicate with trunking on?
Also I'm not sure if there are specific groups of ports that would make traffic move more smoothly. Eg) is there one central hub in the back of the switch that all data going form port 1->2 and also 1->48 will pass through? Or can 1 communicate with 2 without interfering with data from 47 to 48? Or when the ports are all in module 1, does that mean the module itself has a central hub that all data will pass through?