Which address translation scheme would allow a single public IP address to always correspond to a single machine on an internal network, allowing "server publishing"?
Static Network Address Translation (Static NAT) allows a single private IP address to be mapped to a single public IP address. This one-to-one mapping ensures that the same internal machine is always reachable through the same external IP address, which is crucial for "server publishing" — making internal servers (e.g., web servers, FTP servers) accessible from the internet.
From CEH v13 Courseware:
Module 03: Scanning Networks
Topic: Network Address Translation
Section: Types of NAT
CEH v13 Study Guide states:
“Static NAT provides a fixed translation of a private IP address to a public IP address. It is commonly used when an internal server must always be accessible from the Internet using a consistent IP address — this is known as server publishing.”
Incorrect Options:
A. Overloading PAT: Multiple private IPs share a single public IP using port numbers — not suited for static mappings.
B. Dynamic PAT: Similar to overloading; used for outbound traffic only.
C. Dynamic NAT: Assigns a public IP from a pool; the mapping can change, not suitable for server publishing.
[Reference:CEH v13 Study Guide – Module 3: Scanning Networks → NAT TypesRFC 3022 – Traditional NAT Terminology, ======, , ]
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