After disconnecting my regular switch and connecting a Cisco Small Business Gigabit Switch with QoS (model # SG 102-24) none of my computers can communicate with each other.
However, as soon as I hooked the old DLink switch back up and plugged all of the network cables into it, my network's computers were once again able to fully communicate with each other, communicate with the server, and open internet web pages.
According to this Cisco SG 102-24 switch's documentation, no type of configuration is necessary--all that you have to do is to power on the switch and then plug all of the network cables into it. I have done this, and none of the computer were able to communicate with each other.
What do I need to do so that this switch will allow all of my network's computers to fully communicate with each other and with the internet?