accessaclaclsaddressareacharacteristicsconceptsconfigurationconfigureconnectivitycontroldesigndevicediscoveryhardwareipipsecipv4listsmanagementmodifynatnetworksospfospfv2pointpurposeqosroutersinglestandardswitchthreattoolstranslationtroubleshootingtypesvirtualizationvpnvulnerabilitieswanwide