After installing a server based application, an administrator is failing to connect from their desktop. The administrator is able to ping the server by both IP and DNS name. Which of the following is

Incorrect firewall settings prevent specific application ports from communicating, even when basic network connectivity (like ping, which uses ICMP) is working. A firewall blocks traffic based on ports or protocols, stopping application-level connections.

Incorrect duplex settings would typically cause severe network performance issues or complete connectivity loss, affecting ping as well as application access.

An incorrect VLAN configuration would prevent any network communication, including ping, between the desktop and the server.

Incorrect NIC configurations (e.g., wrong IP address or subnet mask) would prevent basic network connectivity, meaning ping would also fail.