The PC would consult the IPv4 Route Table and find that there is no exact match for the destination IP address. It would then choose the local default route (network 0.0.0.0, netmask 0.0.0.0) to reveal that it should forward the packet to the 192.168.1.1 gateway address (address of a gateway device such as a router interface on the local network). The PC would then forward the packet to the gateway using its local interface (192.168.1.11). The gateway device will then determine the next path for the packet to take in order to reach the final destination address of 172.16.20.23.