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Home Cisco® 400-007

Cisco® 400-007 Exam Practice Questions (P. 4)

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Question #16

Refer to the diagram. Which solution must be used to send traffic from the foreign wireless LAN controller to the anchor wireless LAN controller?
  1. A
    Send packets without encapsulation to the anchor controller over the routed network.
  2. B
    Encapsulate packets into an EoIP tunnel and send them to the anchor controller.
  3. C
    Send packets from the foreign controller to the anchor controller via Layer 3 MPLS VPN or VRF-Lite.
  4. D
    Send packets from the foreign controller to the anchor controller via IPinIP or IPsec tunnel.

Correct Answer:
B

Question #17
The Company XYZ network is experiencing attacks against their router. Which type of Control Plane Protection must be used on the router to protect all control plane IP traffic that is destined directly for one of the router interfaces?
  1. A
    Control Plane Protection transit subinterface
  2. B
    Control Plane Protection host subinterface
  3. C
    Control Plane Protection CEF-exception subinterface
  4. D
    Control Plane Protection main interface

Correct Answer:
B
chatbot-img GPT-4o - Answer
Absolutely! The Control Plane Protection host subinterface is the go-to choice here because it specifically handles all control plane IP traffic that's directly targeted at the router's own interfaces. This subinterface sorts out the traffic hitting the router itself, ensuring that the actual control plane only deals with legitimate requests and avoids getting swamped by unnecessary or malicious traffic. This directly helps to boost both the performance and security of the router.

Question #18
An architect designs a multi-controller network architecture with these requirements:
* Achieve fast failover to control traffic when controllers fail.
* Yield a short distance and high resiliency in the connection between the switches and the controller.
* Reduce connectivity loss and enable smart recovery to improve the SDN survivability.
* Improve connectivity by adding path diversity and capacity awareness for controllers.
Which control plane component of the multi-controller must be built to meet the requirements?
  1. A
    control node reliability
  2. B
    control path reliability
  3. C
    controller state consistency
  4. D
    controller clustering

Correct Answer:
B
chatbot-img GPT-4o - Answer
Control path reliability is vital for ensuring fast failover and high-resilient connectivity in multi-controller network architectures. This component strategically enhances SDN survivability by managing control traffic effectively during controller failures, supporting recovery mechanisms, and optimizing routing paths. This directly satisfies the specified requirements for path diversity, capacity awareness, and reduced connectivity losses. All these features collectively contribute to robust network performance under varied conditions.

Question #19
Which two control plane policer designs must be considered to achieve high availability? (Choose two.)
  1. A
    Control plane policers are really needed only on externally facing devices.
  2. B
    Control plane policers can cause the network management systems to create false alarms.
  3. C
    Control plane policers require that adequate protocols overhead are factored in to allow protocol convergence.
  4. D
    Control plane policers must be processed before a forwarding decision is made.
  5. E
    Control plane policers are enforced in hardware to protect the software path, but they are hardware platform-dependent in terms of classification ability.

Correct Answer:
DE
chatbot-img GPT-4o - Answer
It's key to understand that control plane policers (CoPP) are crucial in avoiding security risks like DoS attacks, by checking and potentially blocking packets before they reach the control plane and a routing decision is made. Additionally, CoPP's design allows it to be enforced directly in hardware to protect the software path, and although this capability is dependent on the hardware's classification abilities, it significantly enhances the device's overall resilience and stability by preventing unnecessary load on the CPU from potentially harmful traffic. This ensures a higher level of network availability and security.

Question #20
A small organization of 20 employees is looking to deliver a network design service for modernizing customer networks to support advanced solutions.
* Project scope and weekly progress should be visualized by the management.
* Always consider feedback and make changes accordingly during the project.
* Should consider flexibility to change scope at the point of time.
Which project methodology meets the requirements and have the least impact on the outcome?
  1. A
    LEAN
  2. B
    Six-Sigma
  3. C
    Scrum
  4. D
    Kanban

Correct Answer:
C
chatbot-img GPT-4o - Answer
Scrum is the most suitable methodology for the described scenario as it provides flexibility and the ability to incorporate changes and feedback during the project cycle. This adaptability is crucial for a small organization aiming to evolve customer networks dynamically. Scrum also emphasizes regular reviews and updates on progress, which aligns well with the requirement for management to visualize project scope and weekly progress.

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