#2 Does advanced vlan include private vlan for port isolation?
Yes. You can assign ports to a private VLAN and you can logically isolate them from other ports on the switch.
#3 Does this allow vlan passthrough or is the vlan tag destroyed?
It’s should pass through. It’s an unmanaged switch
#4 Does this netgear switch have the noisy fans? or is it fanless? or if it has a fan is it a pwm fan that adjusts according to the temps?
The fan is pretty loud compared to all other PC items I have. I can hear it in the master bedroom and its in the computer room, 2 rooms away! It works good, no problems. Just noisy fan.
#5 Support for link aggregation? want to run 3 or 4 synology 1gb bonded lan's to my 10gb imac for faster r/w speeds.
I believe you will need a managed switch to do link aggregation. How can you tell the switch which protocol to use and which ports are to be included in the group otherwise?