time-exceed
port-unreachable
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(0)http://www.google.com
(1)check DNS --> IP address 74.125.45.147 (146.201.27.x)
(2)compare with your network ID (74.125.45.147 AND 255.255.255.0)
74.125.45.0 v.s. 146.201.27.0
(3)go to 146.201.27.254 (default gateway)
(3.5) arp 146.201.27.x
(4)reply from 74.125.27.147