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| Section | Objectives |
|---|---|
| End-to-End Enterprise Architecture Scenarios | - Service integration
|
| Infrastructure Design (Layer 2 / Layer 3) | - Layer 2 technologies
|
| Multicast and Advanced Services | - Multicast design
|
| MPLS and VPN Architectures | - MPLS fundamentals
|
| Routing and Path Control | - Routing protocol design
|
| Network Design Methodology and Principles | - Design lifecycle and methodology
|
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NEW QUESTION # 20
Which methodology is the leading lifecycle approach to network design and implementation?
Answer: D
Explanation:
* A (PPDIOO - Prepare, Plan, Design, Implement, Operate, Optimize):PPDIOO is Cisco's structured lifecycle methodology designed specifically for network design, deployment, and management. It ensures continuous improvement, iterative design, and aligns technical efforts with business goals throughout the entire network lifecycle.
Other options explained:
* B: Waterfall is a generic software development methodology.
* C: Spiral emphasizes iterative risk management for software development.
* D: V model applies primarily to software verification and validation.
NEW QUESTION # 21
A business wants to refresh its legacy Frame Relay WAN. It currently has product specialists in each of its
200 branches but plans to reduce and consolidate resources. The goal is to have product specialists available via video link when customers visit the nationwide branch offices. Which technology should be used to meet this objective?
Answer: D
NEW QUESTION # 22
Which three Cisco products are used in conjunction with Red Hat to provide an NFVi solution? (Choose three.)
Answer: B,D,E
Explanation:
Cisco NFVi (Network Function Virtualization Infrastructure) solutions integrate with Red Hat's virtualization stack using:
C). Cisco Nexus switches: Provide data center network fabric.
D). Cisco UCS: Provides the compute platform for NFV workloads.
F). Cisco Virtual Network Functions: The software-based network functions running on NFVi (e.g. virtual routers, firewalls, etc.).
Why other options are incorrect:
A: Cisco Prime Service Catalog is a management tool, not part of NFVi infrastructure.
B: Cisco Open vSwitch is not a Cisco product (Open vSwitch is open-source).
E: Cisco Open Container Platform is not part of the NFVi reference solution in conjunction with Red Hat.
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NEW QUESTION # 23
While positive feedback loops generally don't last long enough to bring down a network completly, then long enough to disrupt traffic flows or to cause the networkto converge more slowly then it should.
What are two examples of cases where a positive feedback loop can be long-lived and devasting to the control plane? (Choose two)
Answer: A,C
Explanation:
The rate at which control plane information changes can create a positive feedback loop because rapid, continuous updates cause devices to constantly recalculate routes and states, which can overwhelm the control plane and slow network convergence. This sustained churn can be long- lived and destabilizing.
Redistribution of reachability information between multiple control planes is known to open the door to very destructive positive feedback loops. When routes are redistributed between different routing protocols or control planes, inconsistent metrics or route flapping can cause repeated updates and oscillations, severely impacting control plane stability.
NEW QUESTION # 24
A Service Provider is designing a solution for a managed CE service to a number of local customers using a single CE platform and wants to have logical separation on the CE platform using Virtual Routing and Forwarding (VRF) based on IP address ranges or packet length. Which is the most scalable solution to provide this type of VRF Selection process on the CE edge device?
Answer: D
Explanation:
When logical VRF separation is based on fields like IP address ranges or packet characteristics (such as packet length), the most scalable solution is:
* Policy-Based Routing (PBR): This allows traffic to be classified and forwarded into the correct VRF based on flexible match conditions like source IP address, destination IP address, or packet size.
Why other options are incorrect:
* A: Static route leaking lacks flexibility and scalability for dynamic classification.
* C: OSPF per VRF handles control-plane separation, but not data-plane traffic classification.
* D: MP-BGP is used for control-plane VPN route exchange, but not for VRF selection based on traffic attributes.
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NEW QUESTION # 25
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