A network administrator notices that devices on the local network are unable to access external websites. After verifying that internet services from the ISP are operational and that internal resources are accessible, the administrator suspects an issue with the network's routing configuration. What configuration error is likely causing the devices to fail connecting to external websites?
The routing table contains incorrect entries for local subnets.
ACLs are blocking access to external network addresses.
Incorrect subnet masks are configured on the devices.
The default gateway is not correctly configured on the router.