An administrator has connected a new server to the network. The server can only gain access to devices located on the same subnet. Which of the following is the problem?

Incorrect firewall settings might block specific types of traffic or access to certain services, but they would typically not prevent all communication with devices on other subnets entirely while allowing local subnet communication.

The default gateway is the IP address of the router or Layer 3 switch that forwards traffic from the local subnet to other subnets and networks. If the server's default gateway is incorrect or missing, it will not know where to send traffic destined for external networks, limiting communication to the local subnet.

A bad cable would likely prevent any network communication, including within the same subnet, or cause intermittent connectivity, rather than specifically restricting communication to only the local subnet.

An incorrect duplex setting primarily affects communication performance and can lead to packet loss and collisions, but it usually does not completely prevent communication with other subnets while allowing local subnet access.