It has been about 48 hours since I installed some new cables in the configuration. I do need to work on the cable management issue some time.    To make a long story short. SUCCESS!!   Thanks for all your help and insights.     
My configuration includes a TB16 docking station. Last year my original TB16 died so the nice folks at Dell sent me a new one. During the first few months on operation, it appeared the wired connection my network and the internet was not working. Only the WiFi was connecting the laptop to the network and the internet. Since this was basically a new install, I am assuming I updated the TB16 FW. Not sure how to check to see if I have the most current.   A few days ago, it appeared as though the wired connection was working. This was indicated by the networking icon in the toolbar. It was the World Globe icon rather than the WiFi icon. When I am on the TB16 configuration, my network connection appears to operate more like a dial-up modem rather than my Gig service. When in laptop mode, I am getting the performance I expected from my Gig service.    Not sure where to start from a troubleshooting standpoint. I was thinking of starting a Chat session with the Dell techs, but that is probably only possible in laptop mode. Not sure if they could do a remote session that would help when I am not connected to the TB16.   Any advice will be much appreciated.     
TB16 problems with wired network connection (I think)