<P> The office's hosts send packets to addresses within this range directly, by resolving the destination IP address into a MAC address with the Address Resolution Protocol (ARP) sequence and then encapsulates the IP packet into a MAC frame addressed to the destination host . </P> <P> A packet addressed outside of this range, for this example, addressed to 192.168. 12.3, cannot travel directly to the destination . Instead it must be sent to the default gateway for further routing to their ultimate destination . In this example, the default gateway uses the IP address 192.168. 4.1, which is resolved into a MAC address with ARP in the usual way . The destination IP address remains 192.168. 12.3, but the next - hop MAC address is that of the gateway, rather than of the ultimate destination . </P> <P> In another example, a network with three routers and three hosts is connected to the Internet through router1 . The hosts' addresses are: </P> <Ul> <Li> PC1 10.1. 1.100, default gateway 10.1. 1.1 </Li> <Li> PC2 172.16. 1.100, default gateway 172.16. 1.1 </Li> <Li> PC3 192.168. 1.100, default gateway 192.168. 1.96 </Li> </Ul>

Which address range could be assigned to the default gateway to indicate a local router