Question 164 of 2,152

NAT and PAT →hardMultiple ChoiceObjective-mapped

300-410 NAT and PAT Practice Question

This 300-410 practice question tests your understanding of nat and pat. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.

An engineer configures EIGRP named mode on a router and uses an offset-list to increase the feasible distance (FD) of a specific route. Unexpectedly, the route is still installed in the routing table with the original metric. Which is the most likely explanation?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
The offset-list was applied to outbound updates instead of inbound, so it affected the FD on the neighbor, not the local router.
Correct. Offset-list direction matters; outbound affects neighbor's FD.
B
The offset-list value was too large, causing the route to be suppressed.
Why wrong: Large offset would increase metric, not keep original.
C
The offset-list was applied to the wrong interface.
Why wrong: Wrong interface would not affect the route at all.
D
The route is a connected route, and offset-lists do not affect connected routes.
Why wrong: Offset-lists can affect redistributed connected routes.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

The offset-list was applied to outbound updates instead of inbound, so it affected the FD on the neighbor, not the local router.

In EIGRP named mode, an offset-list applied to outbound updates modifies the metric on the route as advertised to neighbors, not the local router's feasible distance (FD). Since the local router's FD remains unchanged, the route is still installed with its original metric. To increase the FD locally, the offset-list must be applied to inbound updates.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
The offset-list was applied to outbound updates instead of inbound, so it affected the FD on the neighbor, not the local router.
Why this is correct
Correct. Offset-list direction matters; outbound affects neighbor's FD.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The offset-list value was too large, causing the route to be suppressed.
Why it's wrong here
Large offset would increase metric, not keep original.
✗
The offset-list was applied to the wrong interface.
Why it's wrong here
Wrong interface would not affect the route at all.
✗
The route is a connected route, and offset-lists do not affect connected routes.
Why it's wrong here
Offset-lists can affect redistributed connected routes.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Cisco often tests the distinction between inbound and outbound offset-lists, trapping candidates who assume offset-lists always affect the local router's metric without considering the direction keyword.

Detailed technical explanation

How to think about this question

Offset-lists in EIGRP work by adding an offset value to the delay or composite metric of routes matching an access-list, either on inbound or outbound updates. In named mode, the offset-list is configured under the `af-interface` or `topology` base, and the direction (in/out) determines whether the local FD or the advertised metric to neighbors is modified. A common real-world scenario is using an offset-list to prefer one path over another by artificially increasing the metric on a less desirable link, but misapplying the direction leads to no local effect.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.

Quick reference

Routing Protocol Comparison

Protocol	Metric	Max Hops	Algorithm	Type
RIP v2	Hop count	15	Bellman-Ford	Distance vector
OSPF	Cost (bandwidth)	Unlimited	Dijkstra (SPF)	Link state
EIGRP	Composite metric	Unlimited	DUAL	Hybrid
IS-IS	Cost	Unlimited	Dijkstra	Link state
BGP	Policy / attributes	Unlimited	Path vector	Path vector

RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this 300-410 question test?

NAT and PAT — This question tests NAT and PAT — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The offset-list was applied to outbound updates instead of inbound, so it affected the FD on the neighbor, not the local router. — In EIGRP named mode, an offset-list applied to outbound updates modifies the metric on the route as advertised to neighbors, not the local router's feasible distance (FD). Since the local router's FD remains unchanged, the route is still installed with its original metric. To increase the FD locally, the offset-list must be applied to inbound updates.

What should I do if I get this 300-410 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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