I have questions regarding Tools to Explore Domain Information.

. Describe the most common tools used by both malicious and ethical hackers to conduct footprinting. 2. Describe why ethical hackers explore network information before carrying out an investigation. 3. Analyze the primary differences between Nslookup and Whois in assessing domain information. 4. Explain how an ethical hacker uses the information derived by use of Nslookup and Whois to mitigate network connectivity issues.

I appreciate any help on these.