Answer:
4. Regional Internet registries
Step-by-step explanation:
Cyber security can be defined as preventive practice of protecting computers, software programs, electronic devices, networks, servers and data from potential theft, attack, damage, or unauthorized access by using a body of technology, frameworks, processes and network engineers.
With cybersecurity theory, security standards, frameworks and best practices we can guard against cyber attacks and easy-to-guess passwords such as using alphanumeric password with certain composition and strength.
Some examples of the Internet sources that hackers use to gather information about a company's employees includes;
I. Blogs.
II. Company website.
III. Social networking sites.
However, Regional Internet registries cannot be used by hackers to gather information about a company's employees because it is an internet protocol resource organization saddled with the responsibility of allocating and registering internet protocol (IP) addresses.