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300-410 Practice Question: Which TWO statements about route summarization in…
Which TWO statements about route summarization in EIGRP are true? (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
✓
EIGRP automatic summarization is enabled by default for classful networks.
EIGRP supports manual summarization on any interface using the 'ip summary-address eigrp' command, and automatic summarization is enabled by default for classful networks. EIGRP does not support automatic summarization at the classful boundary for all networks; it is only for major network boundaries. Summarization in EIGRP does not require a route-map, and it can be configured on any interface, not just serial interfaces.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
EIGRP automatic summarization is enabled by default for classful networks.
Why this is correct
By default, EIGRP summarizes routes at classful boundaries when automatic summarization is enabled.
- ✓
Manual summarization can be configured using the 'ip summary-address eigrp' command under interface configuration.
Why this is correct
This command is used to configure manual route summarization on a specific interface in EIGRP.
- ✗
EIGRP supports automatic summarization for all types of networks, including discontiguous subnets.
Why it's wrong here
Automatic summarization only works for classful boundaries and can cause issues with discontiguous subnets.
- ✗
Route summarization in EIGRP requires the use of a route-map to define the summary prefix.
Why it's wrong here
No route-map is required; the summary address is specified directly in the command.
- ✗
Manual summarization can only be applied to serial interfaces.
Why it's wrong here
Manual summarization can be applied to any interface, including Ethernet, FastEthernet, and others.
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.
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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.