Some users are unable to access resources on the file server.

Given the network information for the server “InternalToolCentral” with an IP address of “192.130.230.5” and a subnet mask of “255.255.255.0”, the gateway address should be within the same network range. However, the gateway address is listed as “192.130.230.1”, which is correct and within the same subnet. Therefore, the issue is not with the gateway settings.

The DNS servers are listed as “8.8.8.8” and “4.2.2.1”, which are public DNS servers and should be able to resolve domain names correctly if they are reachable.

The open ports listed include 25 (SMTP), 80 (HTTP), 110 (POP3), 443 (HTTPS), and 3306 (MySQL), which are standard ports for their respective services.

Considering the provided options and the network settings, the most likely explanation for users being unable to access resources on the file server is: A. Applicable ports have been closed during routine hardening. This could prevent users from connecting to the necessary services on the file server.