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| Section | Weight | Objectives |
|---|---|---|
| Security Design | 15% | - Regulatory compliance and governance - Security integration in network architecture - Segmentation, access control and policy enforcement - Threat mitigation and visibility design |
| Control, Data, Management Plane and Operational Design | 25% | - Traffic flow and plane separation design - Software-defined and controller-based solutions - Control plane architectures: centralized, decentralized, hybrid - Automation, orchestration and model-driven management |
| Service Design | 15% | - Service placement and data governance - Operational resilience and compliance - Cloud connectivity and multi-service integration - Support for voice, video, IoT, storage and applications |
| Network Design | 30% | - Design under technical, operational and application constraints - Implementation, migration and transformation planning - Modular, resilient, scalable network architectures - Traditional and software-defined network design |
| Business Strategy Design | 15% | - Project management methodologies impact - Business continuity and sustainability design - Business requirements analysis and alignment - Cost analysis and risk management |
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NEW QUESTION # 301
Refer to the exhibit.
Company XYZ must design a DMVPN tunnel between the three sites. Chicago is going to act as the NHS, and the company wants DMVPN to detect peer endpoint failures. Which technology should be used in the design?
Answer: C
Explanation:
In a DMVPN (Dynamic Multipoint VPN) design:
* One site (here, Chicago) functions as the Next Hop Server (NHS), which facilitates dynamic spoke-to- spoke tunnel establishment.
* DMVPN is based on multipoint GRE tunnels combined with NHRP (Next Hop Resolution Protocol).
* The ability to detect remote tunnel endpoint failures is essential for reliable routing convergence and tunnel restoration.
While GRE (Option C) is the encapsulation mechanism used in DMVPN, it does not inherently provide failure detection. Likewise, VPLS and L2TPv3 are Layer 2 VPN technologies and not applicable in DMVPN design.
To meet the requirement of peer failure detection, the correct mechanism is:
* B. IP SLA (Service-Level Agreement): This is a feature that actively monitors the health and reachability of tunnel endpoints through periodic probes (e.g., ICMP echo). When the peer becomes unreachable, routing protocol adjacencies can be withdrawn, and alternate paths selected.
Using IP SLA in a DMVPN design helps detect endpoint failure scenarios such as:
* A spoke going down unexpectedly
* Loss of return traffic
* Partial link failures
This design pattern is aligned with CCDE v3.1 "Protocol Design Implications", emphasizing resiliency, fault detection, and efficient routing convergence in overlay VPN designs like DMVPN.
NEW QUESTION # 302
What are two primary design constraints when a robust infrastructure solution is created? (Choose two.)
Answer: B,C
Explanation:
In infrastructure design, primary constraints are:
* D (Component availability): If hardware or software components are not readily available, designs may need to adapt.
* E (Total cost): Budget limitations always influence design decisions regarding redundancy, scalability, and technology selection.
Why other options are not primary constraints:
* A: Monitoring is a design consideration, but not a core constraint.
* B: Time frame impacts project delivery, not necessarily the design robustness.
* C: Staff experience affects operations but is not a primary technical design constraint.
-
NEW QUESTION # 303
Your company uses various transport types (PPPoE, IPsec, GRE). Which solution helps improve efficiency over these networks?
Answer: A
Explanation:
#Explanation:
* A: Path MTU Discovery (PMTUD) determines the maximum transmission unit (MTU) along the path to avoid IP fragmentation. Protocols like PPPoE, IPsec, and GRE add overhead, reducing effective MTU. PMTUD adjusts packet sizes dynamically, improving network efficiency by avoiding fragmentation.
Other options:
* B: OATM is not a valid or recognized network optimization method.
* C: IRDP (ICMP Router Discovery Protocol) is used for finding default gateways, not optimizing transport.
* D: Host Discovery Protocol is not a relevant mechanism for efficiency improvement in tunneling environments.
NEW QUESTION # 304
Which two features are advantages of SD-WAN compared to MPLS-based connectivity? (Choose two.)
Answer: A,D
NEW QUESTION # 305
Which three tools are used for ongoing monitoring and maintenance of a voice and video environment?
(Choose three.)
Answer: C,E,F
NEW QUESTION # 306
......
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