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  1. Home
  2. Cisco Certification
  3. 400-007 Exam
  4. Cisco.400-007.v2025-12-06.q401 Dumps
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Question 186

Which design principal improves network resiliency?

Correct Answer: B
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Question 187

Company XYZ wants Layer 2 redundancy while prioritizing flexibility and scalability. Which two technologies help meet these goals? (Choose two)

Correct Answer: A,B
#Explanation:
* A: Avoiding VLAN stretching across switches reduces STP-related complexity and increases fault domain isolation, improving scalability.
* B: Switch clustering (e.g., VSS or StackWise) allows multiple switches to be managed as one logical device, simplifying management and improving scalability and redundancy.
Other options:
* C: DHCP snooping improves security but doesn't directly contribute to redundancy or scalability.
* D: UDLD helps detect unidirectional links, improving link-level fault detection-not Layer 2 architectural scalability.
* E: Root guard is a protection mechanism, not a scalability enabler.
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Question 188

Refer to the exhibit.

This network is running EIGRP as the routing protocol and the internal networks are being advertised in EIGRP. Based on the link speeds, all traffic between London and Rome is getting propagated via Barcelona and the direct link between London and Rome is not being utilized under normal working circumstances. The EIGRP design should allow for efficiency in the routing table by minimizing the routes being exchanged. The link between London and Rome should be utilized for specific routes. Which two steps accomplish this task? (Choose two.)

Correct Answer: A,D
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Question 189

Company XYZ is designing the IS-IS deployment strategy for their multiarea IS-IS domain. They want IS-IS neighbor relationships minimized on each segment and the LSDB size optimized. Which design can be used?

Correct Answer: D
* D (L1/L2 for ABRs and L1 for internal routers):This hierarchical approach minimizes LSDB size inside areas (L1 routers only maintain intra-area routes) while L1/L2 routers handle inter-area route propagation, reducing neighbor adjacencies and improving scalability.
Other options explained:
* A: Level 2 everywhere results in larger LSDBs across all routers.
* B: Only L2 routers at ABRs would isolate L1 domains improperly.
* C: Pure L1 design prevents inter-area reachability.
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Question 190

Which actions are performed at the distribution layer of the three-layer hierarchical network design model? (Choose two)

Correct Answer: C,E
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