Problem\# 4 [15 Pts] In this problem, you will need to explore about "whois" and "nslookup" command to answer the following questions. 1. What is a whois database? 2. Use various whois databases on the Internet to obtain the names of two DNS servers. Indicate which "whois" databases you used. 3. Use nslookup on your computer to send DNS queries to three DNS servers: your local DNS server and the two DNS servers you found in part (b). Try querying for Type A, NS, and MX reports. Summarize your findings. 4. Use "nslookup" to find a Web server that has multiple IP addresses. Does the Web server of UTEP have multiple IP addresses? 5. Use the "ARIN whois" database to determine the IP address range used by UTEP. 6. Describe how an attacker can use "whois" databases and the "nslookup" tool to perform reconnaissance on an institution before launching an attack. 7. Why do you think "whois" databases should be publicly available