A technician inspects the following workstation configuration: The workstation is unable to open any external websites. The browser displays an error message that says that the site cannot be reached.

While an incorrect DNS suffix may cause issues with name resolution, it does not prevent a workstation from reaching external websites if the IP configuration is otherwise correct. The browser may still display sites if the correct IP address is used; therefore, this option does not directly cause the problem described.

An incorrect IP address can lead to network connectivity issues, but it does not necessarily mean that the workstation cannot open any external websites. If the workstation’s IP address is still valid within its local network, it may still reach local resources and possibly some external sites, depending on network configurations.

An incorrect subnet mask could affect local network communication, but it would not solely result in the inability to access external websites. If the subnet mask incorrectly defines the network boundaries, the workstation may still reach the default gateway, thus allowing access to external websites, assuming the gateway is correctly configured.