Free Practice Questions for Cisco 400-007 Exam

B (IPFIX telemetry data):IPFIX provides detailed flow-level visibility, enabling identification of traffic patterns, data flows, and destinations. This data is critical for understanding current traffic behavior to identify governance gaps and improve policy compliance.

Other options explained:

A: Secure tunnels protect traffic but do not identify governance gaps.

C: Firewalls provide limited flow visibility compared to telemetry.

D: Workload policies enforce security but do not aid initial visibility analysis.

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To conserve IPv4 addresses and achieve fast convergence:

B: Using /31 subnets for point-to-point (P2P) links enables each link to consume only two IP addresses. This is widely supported and conserves address space.

C: A hub-and-spoke design with P2P links minimizes the number of neighbor relationships and simplifies routing convergence.

Other options:

A: Multipoint Metro-E introduces neighbor adjacency complexity and DR/BDR elections, which delay convergence.

D: Aggregation is more applicable to prefix summarization, not address conservation per link.

E: DR/BDR roles apply only in broadcast/multicast environments, not P2P links.

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B (Minimize operational costs): A common business goal to reduce long-term operating expenses.

E (Reduce complexity): Simplifying designs reduces operational overhead, risk, and failure domains.

Why other options are incorrect:

A: Resiliency is a design goal, but not a business objective itself.

C: Endpoint posture is a technical security feature.

D: Faster obsolescence contradicts business optimization.

B (Install firewalls):PCI DSS requires network segmentation, filtering, and perimeter defense via firewalls.

C (Use antivirus software):Malware protection and anti-virus software are mandatory on all systems interacting with cardholder data.

Other options explained:

A/D/E: These are general security best practices but not specific mandatory requirements under PCI DSS control objectives.

D (Lifecycle model):The lifecycle model aligns directly with traditional project management (such as Waterfall). It follows a sequential, phase-driven process: requirement gathering, design, implementation, testing, and maintenance. Each phase must be completed before moving to the next, with defined milestones and documentation.

Other options explained:

A: " Static model " is not a standard recognized development model.

B: Agile is iterative and adaptive, opposite of traditional models.

C: Evolutionary delivery is more incremental, not fully aligned with traditional models.

In data center migration scenarios, when legacy and VXLAN EVPN networks are connected for host mobility, a critical step is to ensure a seamless Layer 3 gateway handoff. This is typically achieved using VRRP (or HSRP) where both the old and new gateways share the same virtual IP.

The final step involves:

Increasing the VRRP priority on the new VXLAN-enabled infrastructure to make it the active default gateway.

Ensuring that hosts retain their original default gateway (no reconfiguration required).

Only after the new gateway is active, the legacy SVIs can be gracefully shut down.

This method ensures no packet loss or disruption to host connectivity during or after migration.

It aligns with CCDE v3.1 under the “Network Architecture Principles” domain, particularly for data center transformation, operational consistency, and seamless L2–L3 handoff design patterns.

Data governance, especially for a national bank under EU regulations, is the most critical factor.

Regulations like GDPR restrict where and how sensitive data, particularly financial data, can be stored and processed.

Migrating data outside of EU jurisdictions without compliance could result in legal violations.

Why other options are incorrect:

B: Latency is important but secondary to regulatory compliance.

C: Security is always important but not the unique issue here.

D: Cloud connectivity is technical, not the primary legal concern.

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DTLS (Datagram Transport Layer Security) is the most optimized overlay protocol for SDWAN deployments over public internet, especially when NAT traversal is required.

It combines security similar to TLS while using UDP, which handles packet loss, jitter, and reordering better than TCP-based TLS.

DTLS is natively supported in most SDWAN solutions for encrypted transport across NAT environments without complex configurations.

It allows optimal performance on unreliable or high-latency networks while maintaining strong security standards.

Why other options are incorrect:

A (TLS): Uses TCP, less suited for networks with packet loss or reordering.

C (IPsec): Requires additional NAT traversal mechanisms like NAT-T and may not handle unreliable underlay as effectively as DTLS.

D (GRE): Tunneling protocol without native encryption.

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