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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 route summary IP routing table maximum-paths limit: 32 IP routing table entry count: 15 IP routing table active entry count: 15
Number of prefixes: 15 Number of /0: 0 Number of /8: 1 Number of /16: 2 Number of /24: 12 Number of /32: 0
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 routing table contains 2 /16 summary routes, likely summarizing the 12 /24 subnets, indicating successful route summarization.
This output shows a summary of the IP routing table. The prefix length distribution indicates that there are 2 /16 routes and 12 /24 routes. This suggests that route summarization is in effect, as the /16 routes likely summarize the /24 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.
- ✓
The routing table contains 2 /16 summary routes, likely summarizing the 12 /24 subnets, indicating successful route summarization.
Why this is correct
The presence of fewer /16 routes than /24 routes suggests summarization is working.
- ✗
The routing table has no summarization, as all routes are /24 or smaller.
Why it's wrong here
There are 2 /16 routes, which are summary routes.
- ✗
The routing table is full and cannot accept more routes.
Why it's wrong here
The entry count is only 15, well below typical limits.
- ✗
The summary routes are not being used because they are inactive.
Why it's wrong here
All 15 entries are active.
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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.