There is a logic circuit with three input variables, connected to abomb.
the function(a, b,c) of this circuit is ac + b'c .
when the input is 101 or 010, the bomb connected to this circuitexplodes.
try to modify the function so that for any input, bomb doesnot explodes?

Ineed more infomation

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Answera broadband connection is a high-speed internet connection,broadband usually has a data transmission rate of 256 kbps or higher

That i would call a dead end, since you can't know that it's always possible to immediately reconnect (server could be down, lines between you and the server could be down), and even if it was this would take some time slipping the packages out your wan in the meantime.the solution to this problem rather like satras says to block wan access for those hosts, and if policy routing is being used you need to use the soltion found by fastlanejb in this thread:   the link to the problem forum