The default gateway for a network should be an IP address within the subnet, but not the broadcast address. In this case: IP: 192.163.1.15 Subnet Mask: 255.255.255.0 This means the network range is: 192.163.1.0 - 192.163.1.255 192.163.1.255 is the broadcast address for this subnet, so it cannot be used as a gateway. Hence, the device fails to communicate outside its subnet because it's trying to use a broadcast address as its gateway. # The issue is clearly with the gateway configuration. Reference:CompTIA Network+ N10-009 Official Study Guide - Objective 1.4: "Given a scenario, configure and deploy common Ethernet switching features."