Answer: A user authentication
Answer:
Mathpix Snip, Socratic, Microsoft Math Solver....etc.
Explanation:
Hope this helps! :)
I would evaluate baggage and personal belongings, rooms or closets, people's clothing, and if anyone has a weapon.
Put some more of your time to help improve that skill.try to learn to get better.
Answer:
You can setup firewall rules with for example iptables on Linux. The rules should block source addresses of private IP ranges such as 192.168.*.* and 10.*. *. * etc. Check private IP ranges for full list.
It will however not guarantee prevention of IP spoofing in general as its not possible to prevent such attacks. Its the responsibility of ISPs. But the question asked for private IP spoofing and then the above works.