GIAC
GSLC · Question #153
GSLC Question #153: Real Exam Question with Answer & Explanation
The correct answer is C. SNAT. SNAT (Static NAT) is the specific process that performs one-to-one rewriting of both source and destination IP addresses as packets traverse a router or firewall.
Question
Which of the following is the process of rewriting source and destination addresses of IP packets as they pass through a router or firewall?
Options
- ANAT
- BSupernetting
- CSNAT
- DPAT
Explanation
SNAT (Static NAT) is the specific process that performs one-to-one rewriting of both source and destination IP addresses as packets traverse a router or firewall.
Common mistakes.
- A. NAT is the broad umbrella term for the entire address translation technology family, not the specific mechanism for rewriting both source and destination addresses.
- B. Supernetting is the technique of aggregating multiple contiguous network prefixes into a single larger route summary, which has no relation to address translation.
- D. PAT (Port Address Translation) maps many internal addresses to a single external IP using unique port numbers to track sessions, which differs from the direct IP address rewriting described.
Concept tested. Static NAT bidirectional IP address rewriting
Reference. https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/26704-nat-faq-00.html
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