mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot a…
A network engineer runs the following command to troubleshoot a Route Summarization issue:
R1# show ip nhrp detail 10.0.0.0/16 via 10.1.1.2, Tunnel0 created 00:01:00, expire 01:59:00
Type: summary, Flags: used NBMA address: 192.168.1.2 Registration: never
What does this output indicate?
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 summary route 10.0.0.0/16 is learned via NHRP and is active, with the next hop being 192.168.1.2 over Tunnel0.
This output shows an NHRP cache entry for the summary route 10.0.0.0/16. The type is 'summary', indicating that this is a summary route learned via NHRP. The 'used' flag and NBMA address show that the route is active and pointing to a specific tunnel destination.
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 summary route 10.0.0.0/16 is learned via NHRP and is active, with the next hop being 192.168.1.2 over Tunnel0.
Why this is correct
The 'summary' type and 'used' flag confirm this is an active NHRP summary route.
- ✗
The summary route is not being used because the 'used' flag is not set.
Why it's wrong here
The 'used' flag is present.
- ✗
The summary route is learned via EIGRP, not NHRP.
Why it's wrong here
The output is from 'show ip nhrp detail', indicating NHRP.
- ✗
The summary route is a static route configured on the router.
Why it's wrong here
NHRP is a dynamic protocol; the type 'summary' indicates it is learned via NHRP summarization.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
BGP Route Aggregation
BGP Route Aggregation is a technique that combines multiple specific network routes into a single summary route to reduce the size of routing tables and improve network efficiency.
Key term
DMVPN Phase 2
DMVPN Phase 2 is an advanced Cisco routing technology that allows spoke routers to communicate directly with one another without sending traffic through a central hub, using dynamic routing protocols and multipoint GRE tunnels.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.