Your manager has tasked you with implementing security controls to mitigate IP spoofing attacks against your network. IP spoofing is a method of attack that involves sending packets to a target network while hiding the attacker's address using a false source address. What method outlined would achieve anti-spoofing, to mitigate private IP spoofing attacks against your network?

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.

it would be six meters as well