This is homework...
First step for cyber security is a good firewall. For physical security you need access control (locked doors and card entry, ect).
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to protect a computer or network from unauthorized access
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virus
confidentiality
Accessing information and evaluating advertisements
Passwords protect a computer and/or computer account from anyone accessing the system.
For either a personal or a business wireless network, it's to protect it from unauthorized users.
Clean up pollution, insure that the salinity is not disrupted unnaturally, and prohibit overfishing.
Windows Firewall
There are laws that prohibit child abuse or any mistreatment towards any child. However, the government cannot directly protect children.
Encryption