I apologize in advance for the length of this post, hopefully there will be a few folks both knowledgeable enough and patient enough to wade through this and point me in the right direction. All of my problems began when I switched from DSL to Cable internet service. With my DSL service I was provided a DSL modem which also contained a 4 port Ethernet switch. There was basically no configuration involved. I connected 2 PC’s and an Ethernet printer, all of which were configured to obt...