Sorry. What I meant to say was that your problems may have been due to a network outage between your router and the Internet.
Did you see if you were able to connect to Internet resources while you were having the issue with your Arc?
Android OS and apps are quite resilient against temporary network disruptions. In some cases, they may not be too responsive or verbose about it but its unlikely that permanent configuration changes are made as a result.
A "power off/restart" should bring it all back up the way it was before.