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300-410 Practice Question: Which TWO configuration steps are required to…
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.
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.
- ✓
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.
- ✗
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.
Why it's wrong here
This is an EIGRP command; OSPF does not use interface-level summarization.
- ✗
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.
Visual reference
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.
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
OSPF Default Route Advertisement
OSPF Default Route Advertisement is the process by which a router using the OSPF routing protocol tells other routers to send all traffic for unknown destinations to it, acting as a gateway of last resort.
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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.