ICND1: Interconnecting Cisco Networking Devices Part 1 (CCENT, legacy) — Question 4

Under which circumstance should a network administrator implement one-way NAT?

Answer options

• A. when the network must route UDP traffic
• B. when traffic that originates outside the network must be routed to internal hosts
• C. when traffic that originates inside the network must be routed to internal hosts
• D. when the network has few public IP addresses and many private IP addresses require outside access

Correct answer: D

Explanation

One-way NAT is ideal for scenarios where there are insufficient public IP addresses to accommodate all private IP addresses that require access to the outside world, which aligns with option D. The other options do not accurately capture the primary purpose of one-way NAT, which is to facilitate external access for internal hosts rather than routing internal traffic or managing UDP specifically.