Answer:
Check the explanation
Step-by-step explanation:
If Zenmap SYN scan did not work in your lab, then that means the application could not locate the network you were attempting to scan, i.e. 10.20.1.0/24. Recall that in Section 2.
Part 2. You added a Route for 10.20.1.0 to be routed via the 172.30.0.1 gateway. That route you added to communicate with the 10.20.1.0 network is a temporary route and will be replaced each time.