![]() This router then broadcasts the packet using layer 2 broadcast. Subnet directed broadcasts are treated like unicast network packets until processed by the final (local) router. SDB may require changes to intermediate router configuration. Subnet directed broadcasts (SDB) may be used to overcome this limitation. This prevents the technique being used in larger networks or over the Internet. Subnet directed broadcastsĪ principal limitation of standard broadcast wake-on-LAN is that broadcast packets are generally not routed. Because Wake-on-LAN operates below the IP protocol layer, IP addresses and DNS names are meaningless and so the MAC address is required. The Wake-on-LAN implementation is designed to be very simple and to be quickly processed by the circuitry present on the network interface card with minimal power requirement.
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