In reply to:

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Anyone want to chime in with the Default Gateway lesson?
Is this just as easy, or do you realli need someone else to have this explained ?

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Well - basically, to give an over-semplified explanation, the default gateway is the machine that your computer will send packets to that it thinks are outside of the local subnet. SO, for instance, if 128.227.132.xxx (1-255) is your local subnet, then a packet going to 131.12.13.155 will be routed through the gateway machine, which hopefully knows where and how to route that packet.
-mark

...proud to have owned one of the first Mark I units