An administrator is trying to debug why the 10.0.10.0/24 network is inaccessible from a certain server. The server is able to access the internet Successfully. The administrator inspects the routing…

If the default gateway were not responding to ARP, the server would also lose internet access, which contradicts the stated scenario.

Successful internet access confirms the default gateway is reachable and ARP resolution is functioning correctly for outbound traffic. A misconfigured static route for 10.0.10.0/24 - such as a wrong next-hop address, incorrect subnet mask, or wrong exit interface - would make only that specific network unreachable while leaving the default route and all other connectivity unaffected.

An inability to receive ARP responses would break all external communication including internet access, not just access to a single subnet.

A misconfigured default route (0.0.0.0/0) would break internet access, which the scenario explicitly states is working correctly.