For months I frequently have to retry many, MANY, times to connect to common internet sites getting error messages like "site not found" (example CNN, or my credit union, not found - really?) or "no internet connection" or "site took too long to respond". Also while active on an internet site, clicking on a link from therein, and trying to return back to the home page I get errors like "site not found" (I was just there). From my 20+ year career as a systems programmer specializing in networking mainframe computers I am convinced that xfinity's servers (eg: Domain Name Servers) are consistently overloaded/under-sized and fail to respond. (Before I retired I was able to run traces on problematic TCP/IP connections to pinpoint response problems, but I lack that capability now so I can't be more specific.) BTW, I am not downloading movies or playing games and moving a lot of data that might cause xfinity to throttle down my service - I do online banking transactions, email, and read headlines on reputable news sites.