Which statement correctly describes static NAT and dynamic NAT?

Which statement correctly describes static NAT and dynamic NAT?

• A. The static NAT maps a private IP to another private IP; dynamic NAT translates to external.
• B. Static NAT uses a pool of public IPs; dynamic NAT maps private to private.
• C. Static NAT maps a fixed private IP to a fixed public IP; dynamic NAT uses a pool of public IPs and assigns them on demand.
• D. Static NAT allows translation for a single session only.

Answer: (C)

Understanding NAT translations: static NAT provides a fixed one‑to‑one mapping between a private address and a public address, while dynamic NAT uses a pool of public addresses and assigns them on demand as sessions are created. Static NAT keeps the same public address for a given private device, so external partners always reach that device at the same publicly visible IP. Dynamic NAT, by contrast, pulls addresses from a pool; when a host needs to reach outside, the NAT device temporarily assigns an available public address from the pool for the duration of the session and returns it to the pool afterward. If the pool runs out of addresses, new sessions can be delayed or blocked until a public address becomes available. This aligns with the described statement: a fixed private IP maps to a fixed public IP in static NAT, while dynamic NAT uses a pool of public IPs assigned on demand.

Understanding NAT translations: static NAT provides a fixed one‑to‑one mapping between a private address and a public address, while dynamic NAT uses a pool of public addresses and assigns them on demand as sessions are created.

Static NAT keeps the same public address for a given private device, so external partners always reach that device at the same publicly visible IP. Dynamic NAT, by contrast, pulls addresses from a pool; when a host needs to reach outside, the NAT device temporarily assigns an available public address from the pool for the duration of the session and returns it to the pool afterward. If the pool runs out of addresses, new sessions can be delayed or blocked until a public address becomes available.

This aligns with the described statement: a fixed private IP maps to a fixed public IP in static NAT, while dynamic NAT uses a pool of public IPs assigned on demand.