Troubleshooting Inability to Access New Server

B.

The most likely reason that clients located on different subnets are unable to access the server while clients located on the same subnet as the server can access it is that there is a problem with the routing of network traffic between the subnets.

Option A - "DHCP has assigned the wrong addresses" - is unlikely to be the cause of the issue since clients located on the same subnet as the server can access it, indicating that the IP address assigned by DHCP is correct.

Option B - "Incorrect default gateway on the server" - is a possibility. The default gateway is the IP address of the router that connects the local network to other networks, and it is used to forward network traffic between subnets. If the default gateway is configured incorrectly on the server, then network traffic from clients on other subnets may not be able to reach the server.

Option C - "DNS entries were not created" - is unlikely to be the cause of the issue since DNS is used to translate domain names to IP addresses, and clients are able to access other servers on their subnet, indicating that DNS is functioning correctly.

Option D - "WINS server is not responding" - is unlikely to be the cause of the issue since WINS (Windows Internet Name Service) is an older technology that is used to resolve NetBIOS names to IP addresses, and it is not commonly used on modern networks.

In summary, the most likely reason that clients located on different subnets are unable to access the server is an issue with the routing of network traffic, which could be caused by an incorrect default gateway on the server.