NAPT vs Easy IP: Do Both Use Multiple Public Addresses?
Short answer
B FALSE, because Easy IP is a special NAPT that maps many private hosts to the single public IP address of the outbound interface, not to multiple public addresses.
Question
Key Takeaways
The item tests whether you can separate NAPT's port-translation mechanism from the public-address scope of Easy IP, whose trap is assuming 'port translation' implies a pool of public addresses.
NAPT translates both IP addresses and port numbers, but Easy IP is a special many-to-one form that uses the outbound interface's single public address rather than a pool. The statement is therefore FALSE (B).
Common mistake: Choosing TRUE because NAPT translates port numbers and can use an address pool, while overlooking that Easy IP specifically maps all private hosts to one outbound interface address.
Expert Analysis
Why TRUE looks plausible Option A is tempting because the first half of the sentence is textbook NAPT: NAPT translates both the IP address and the transport-layer port number, so several private hosts can multiplex sessions over a translated public address. Many-to-one address sharing is exactly what port translation enables, and candidates often stop reading once they see that familiar phrase.
The qualifier that breaks it The sentence joins NAPT with Easy IP and then requires both to let private addresses share multiple public IP addresses. Easy IP is a special NAPT variant that uses the public IP address of the outbound interface; there is no public address pool to allocate from. Every private host translated by Easy IP shares that single interface address, with different source ports keeping sessions separate. Paraphrasing a comment on this item: Easy IP is specifically for sharing one public address, not a group of public addresses.
How to read the wording Generic NAPT can be configured with an address pool, so port translation and multiple public addresses are not mutually exclusive in NAPT itself. But the statement is a compound claim about "NAPT and Easy IP." Because Easy IP cannot use multiple public addresses, the whole statement is FALSE. The decisive point is not whether ports are translated — they are — but the scope of the public address resource in Easy IP.
Verdict Option B is correct. Choose FALSE whenever a statement attributes public-address-pool sharing to Easy IP; Easy IP's signature is many-to-one translation to the outbound interface address.
Exam Strategy
For true/false NAT items, underline the resource being shared: a single interface address, an address pool, or a pool with port translation. Treat Easy IP as a many-to-one mapping to the outbound interface, so any wording that gives it 'multiple public IP addresses' is false even when the port-translation clause is accurate. Also split compound subjects — if either NAPT or Easy IP fails one clause, the whole statement fails. This technique transfers to NAT, PAT and NAT Server questions that mix mechanism with address scope.
Frequently Asked Questions
Does Easy IP use a public address pool?
Why is the statement false if NAPT translates port numbers?
Can generic NAPT use multiple public addresses?
Community Votes
100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 1 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 1
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1b20e93 👍 1 Answered BEasy IP: Está diseñado específicamente para permitir que múltiples direcciones IP privadas compartan una única dirección IP pública. No utiliza un grupo de múltiples direcciones públicas.
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