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Asystemhasacriticalneedfornetworkservicesonasmallnetworkwithalimitednumberofhosts.Systemoverheadisnotaconcern.Whichofthefollowingshouldthesystemadministratordotohelpensureconnectivityintheeventofagatewayfailure?()
A.Usetheifconfigcommandtoenabledeadgatedetection
B.Usethenocommandtosetactivedeadgatewaydetection
C.Usetheroutecommandtosetactivedeadgatewaydetection
D.Addthelineactive_dgd=1tothe/etc/gated.confcommandandrefreshthegateddaemon
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