Ping, network probs

I CAN use wget to get files and ping to 127.0.0.1 but cannot ping another outside IP nor use Red Hat's up2date. Both 'hang' .I am new so don't overlook the obvious for me. I have set /etc/sysconf/networks and /etc/hosts and /etc/resolv.conf

what is wrong??

 

 

 

 

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