John works as a professional Ethical Hacker. He has been assigned the project of testing the enters the following command on the command prompt: However, he receives an incomplete traceroute result. W

An overloaded router may deprioritize or drop ICMP TTL-exceeded messages it should generate, causing that hop to appear as a timeout and stopping the traceroute output prematurely.

Traceroute relies on receiving ICMP Time Exceeded and Port Unreachable messages; if a firewall on John's machine blocks inbound ICMP error messages, the responses from intermediate hops never arrive and the trace appears incomplete.

If no route exists to the destination, a router along the path returns an ICMP Destination Unreachable message and the trace stops at that hop, producing an incomplete result.

If the destination server is offline or disconnected from the Internet, it cannot reply with ICMP Port Unreachable to signal the final hop, so the last few hops time out and the trace never completes.