During the course of a penetration test, the tester wants to determine the routing relationship between the target company, ISP, and external networks. Which of the following methods will provide this information?
1) Performing a DNS zone transfer from the company's main resolver and from a secondary resolver.
2) Gathering the whois information for the target and the ISP by querying different servers.
3) Sniffing session data both to and from the Internet to the company mailserver.
4) Comparing the results of successive traceroute commands run from multiple locations