The answer is that NAT is configured without PAT, as each inside host uses a unique global address. This is confirmed by the show ip nat translations output, which displays two separate inside global addresses (192.0.2.10 and 192.0.2.11) mapped one-to-one to their inside local counterparts, and the show ip nat statistics output shows zero extended translations, meaning no port address translation is occurring. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your ability to distinguish between basic NAT and PAT by reading command output; a common trap is assuming that any dynamic translation implies overload, but the absence of the overload keyword in the mapping and the presence of only simple translations (no protocol or port numbers) confirms basic NAT. Remember the memory tip: no ports, no overload—if you see only dashes under the Pro column and zero extended translations, you are looking at basic NAT, not PAT.
300-410 NAT and PAT Practice Question
This 300-410 practice question tests your understanding of nat and pat. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer runs the following command on Router R1:
R1# show ip nat translations
Pro Inside global Inside local Outside local Outside global
--- 192.0.2.10 10.0.0.10 203.0.113.5 203.0.113.5
--- 192.0.2.11 10.0.0.11 203.0.113.5 203.0.113.5
NAT is configured without PAT; each inside host uses a unique global address.
The statistics show 0 extended translations, and the mapping lacks 'overload'. The translations show different inside global addresses for each inside local.
B
PAT is enabled, but only two translations are active.
Why wrong: PAT would show extended translations (protocol/port) and the 'overload' keyword in the mapping.
C
The pool is exhausted because two addresses are used.
Why wrong: The pool has 16 addresses; using 2 is not exhaustion.
D
Static NAT is configured for both hosts.
Why wrong: The statistics show 0 static translations.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
NAT is configured without PAT; each inside host uses a unique global address.
The output shows dynamic NAT without overload (no 'overload' keyword in the mapping, and 0 extended translations). Each inside host gets a unique inside global address. This is basic NAT, not PAT. The correct answer is that NAT is working without PAT.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
NAT is configured without PAT; each inside host uses a unique global address.
Why this is correct
The statistics show 0 extended translations, and the mapping lacks 'overload'. The translations show different inside global addresses for each inside local.
PAT is enabled, but only two translations are active.
Why it's wrong here
PAT would show extended translations (protocol/port) and the 'overload' keyword in the mapping.
✗
The pool is exhausted because two addresses are used.
Why it's wrong here
The pool has 16 addresses; using 2 is not exhaustion.
✗
Static NAT is configured for both hosts.
Why it's wrong here
The statistics show 0 static translations.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Trap categories for this question
Keyword trap
PAT would show extended translations (protocol/port) and the 'overload' keyword in the mapping.
Command / output trap
PAT would show extended translations (protocol/port) and the 'overload' keyword in the mapping.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 300-410 subnetting questions on CIDR, address ranges, and subnet selection.
NAT and PAT — This question tests NAT and PAT — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: NAT is configured without PAT; each inside host uses a unique global address. — The output shows dynamic NAT without overload (no 'overload' keyword in the mapping, and 0 extended translations). Each inside host gets a unique inside global address. This is basic NAT, not PAT. The correct answer is that NAT is working without PAT.
What should I do if I get this 300-410 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related 300-410 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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