- A
Configure the 'area area-id range network mask' command under router OSPF configuration.
This command creates a summary route for networks in the specified area, which is the correct method for ABR summarization.
- B
Ensure the summary address is a supernet of the networks being summarized.
The summary address must encompass all the networks in the area; otherwise, the summarization will not include all routes.
- C
Use the 'summary-address network mask' command under router OSPF configuration.
Why wrong: This command is used on ASBRs to summarize external routes redistributed into OSPF, not for inter-area summarization on ABRs.
- D
Apply the 'ip summary-address ospf' command under the interface connecting to the backbone.
Why wrong: This is an EIGRP command; OSPF does not use interface-level summarization.
- E
Configure a 'network' statement that matches the summary address.
Why wrong: The 'network' statement is used to enable OSPF on interfaces, not to create summary routes.
300-410 Route Summarization Practice Question
This 300-410 practice question tests your understanding of route summarization. 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.
Which TWO configuration steps are required to implement manual route summarization in OSPF on an ABR? (Choose TWO.)
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
Configure the 'area area-id range network mask' command under router OSPF configuration.
In OSPF, manual summarization on an ABR is done using the 'area range' command under router configuration mode, which summarizes routes from one area into another. The summary address must be within the range of networks in the area. The 'summary-address' command is used for external routes on ASBRs, not for inter-area summarization. 'network' commands define interfaces, not summarization. 'default-information originate' is for default routes.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure the 'area area-id range network mask' command under router OSPF configuration.
Why this is correct
This command creates a summary route for networks in the specified area, which is the correct method for ABR summarization.
Related concept
Authentication checks who the user is.
- ✓
Ensure the summary address is a supernet of the networks being summarized.
Why this is correct
The summary address must encompass all the networks in the area; otherwise, the summarization will not include all routes.
Related concept
Authentication checks who the user is.
- ✗
Use the 'summary-address network mask' command under router OSPF configuration.
Why it's wrong here
This command is used on ASBRs to summarize external routes redistributed into OSPF, not for inter-area summarization on ABRs.
- ✗
Apply the 'ip summary-address ospf' command under the interface connecting to the backbone.
- ✗
Configure a 'network' statement that matches the summary address.
Why it's wrong here
The 'network' statement is used to enable OSPF on interfaces, not to create summary routes.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Trap categories for this question
Command / output trap
This command is used on ASBRs to summarize external routes redistributed into OSPF, not for inter-area summarization on ABRs.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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.
What to study next
Got this wrong? Here's your next step.
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 300-410 questions on access control and AAA configuration.
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FAQ
Questions learners often ask
What does this 300-410 question test?
Route Summarization — This question tests Route Summarization — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: Configure the 'area area-id range network mask' command under router OSPF configuration. — In OSPF, manual summarization on an ABR is done using the 'area range' command under router configuration mode, which summarizes routes from one area into another. The summary address must be within the range of networks in the area. The 'summary-address' command is used for external routes on ASBRs, not for inter-area summarization. 'network' commands define interfaces, not summarization. 'default-information originate' is for default routes.
What should I do if I get this 300-410 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related 300-410 questions on access control and AAA configuration.
What is the key concept behind this question?
Authentication checks who the user is.
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Last reviewed: Jun 18, 2026
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.
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