312-50V12 practice question 4 of 10

Which of the following tools can be used to perform a zone transfer?

Full set: 573 questions
Answer options
A: NSLookup Correct answer
B: Finger
C: Dig Correct answer
D: Sam Spade Correct answer
E: Host Correct answer
F: Netcat
G: Neotrace
Correct Answer:
A. NSLookup; C. Dig; D. Sam Spade; E. Host
Explanation

A zone transfer (AXFR) is a DNS transaction used to replicate the entire database of a DNS zone from a primary server to a secondary server. Several command-line utilities and tools are designed for this purpose. nslookup (in interactive mode), dig, and host are standard DNS query tools on Windows and Unix-like systems, respectively, that have specific options to request a full zone transfer. Sam Spade is a classic graphical network query tool for Windows that includes a zone transfer function. These tools are commonly used by administrators for diagnostics and by attackers for reconnaissance.

Why Incorrect

B. Finger is a protocol for retrieving information about users on a remote system and has no DNS functionality.
F. Netcat is a versatile networking utility for reading/writing data across network connections but lacks built-in, high-level DNS zone transfer commands.
G. Neotrace is a graphical traceroute tool used for visualizing network paths, not for querying DNS zone data.

References

1. Albitz, P., & Liu, C. (2006). DNS and BIND (5th ed.). O'Reilly Media. (Chapter 12, "Troubleshooting DNS and BIND," details the use of nslookup and dig for zone transfers).

2. University of California, Berkeley. (n.d.). dig(1) - Linux man page. Retrieved from EECS Department course materials. (The man page for dig explicitly documents the AXFR query type for initiating zone transfers).

3. University of Michigan. (n.d.). Host Command. Information and Technology Services. (Documentation for the host command describes the -l option for listing a whole zone, which performs a zone transfer).

4. Skoudis, E., & Zeltser, L. (2003). Malware: Fighting Malicious Code. Prentice Hall PTR. (Section on "Reconnaissance Tools" discusses the capabilities of Sam Spade, including zone transfers).

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