Free Practice Questions for Cisco 400-007 Exam

C (PIM Sparse Mode with RP located at the hub):DMVPN networks typically leverage sparse mode multicast due to their efficiency in dynamic topologies. Locating the Rendezvous Point (RP) at the hub simplifies multicast state management, since the hub serves as the central aggregation point and ensures optimal rendezvous functionality without requiring complex RP placement across spokes.

Other options explained:

A: Dense mode is inefficient and generates unnecessary flooding, especially in WAN environments.

B/D: Placing RPs at remote sites introduces unnecessary complexity and operational challenges.

A: On most hardware platforms, control plane protection is implemented in hardware to safeguard CPU resources from overload due to excessive control traffic.

E: Control plane policing must be carefully sized to allow sufficient protocol traffic (OSPF, BGP, etc.) during normal and convergence periods to ensure stability.

Why other options are incorrect:

B: Policing should be applied universally, not just on external interfaces.

C: False alarms are operational issues but not design considerations.

D: Control plane policers are applied after forwarding decisions for traffic destined to the router CPU.

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Just-in-time (JIT) manufacturing relies on precision timing and real-time data exchanges between production systems and external suppliers. Network latency can directly impact the efficiency and viability of such a system. For this reason, the architect must prioritize a network design that ensures minimal delay and rapid delivery of application and sensor data.

According to CCDE v3.1 design principles, when latency is tied directly to business outcomes (e.g., manufacturing workflow dependencies), the network must be designed with a focus on:

End-to-end low-latency infrastructure

Predictable jitter and delay control

Application prioritization mechanisms (QoS)

High availability and redundancy

This allows the manufacturer to optimize production throughput while reducing delays caused by communication lag with external component providers.

Why other options are incorrect:

A. Automation helps with operational efficiency, but it does not directly ensure low-latency communication.

B. Zero Trust is a security model, not latency-related.

D. Modularity is about design structure, not latency performance.

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C (Complex and distributed management flow):SDN centralizes control-plane management, simplifying complex, distributed configuration and operational models, which is especially valuable in large-scale, dynamic cloud environments.

Other options explained:

A: SDN may assist, but intelligent monitoring is a separate operational task.

B: SDN does not directly address resource growth—it supports scalability but doesn’t limit application resource demands.

D: SDN may reduce OpEx, but the primary benefit is operational simplification rather than direct cost reduction.

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B (Support availability):Defines hours of service and whether support is available 24/7 or during business hours.

E (Resolution time):Specifies the timeframe within which the service provider commits to resolve incidents.

Other options explained:

A: Cost and size are contractual, not SLA performance metrics.

C: Sustainability is long-term environmental or operational, not SLA-specific.

D: Reliability is often captured as uptime or availability but not as a discrete SLA support term.

Encrypting data at rest and in transit is a fundamental best practice to ensure end-to-end data security.

It protects sensitive data both while stored (disk, database) and while moving across networks.

Why other options are incorrect:

A: IPsec secures specific tunnels, but isn’t a complete private cloud solution.

C: Vendor consistency doesn’t guarantee best practice.

D: Anonymization supports privacy but is not a core security best practice for data security.

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The scenario requires controlling how AS 111 sends its outbound traffic (egress traffic). BGP policy control for outbound traffic is best handled via manipulating the BGP Local Preference attribute, as:

Local Preference (LocalPref) influences path selection for outbound traffic by setting a preference for one path over another.

It is evaluated within the AS and does not require coordination with external autonomous systems.

LocalPref changes are fully contained inside AS 111 and satisfy the requirement to only affect AS 111.

A higher Local Preference value is preferred, thus you set higher values for routes learned via AS 100.

Why other options are incorrect:

A (community): Typically influences inbound traffic or interacts with upstream providers.

B (MED): Influences inbound traffic for external neighbors, not outbound.

D (AS Path): Also primarily influences inbound traffic selection by remote ASes.

Comprehensive and Detailed Explanation:

C: Moving workloads or backup/recovery functions to cloud platforms reduces capital expenditure by avoiding the cost of physical infrastructure, data centers, and maintenance. Cloud-based DRaaS (Disaster Recovery as a Service) offers scalability, resilience, and cost efficiency aligned with an OPEX model.

Other options:

A and B are security and software lifecycle tasks, not cost-effective DR strategies.

D increases CAPEX by building and maintaining additional infrastructure.

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EIGRP’s convergence time is heavily impacted by the size of the query domain — the group of routers involved when a route goes into active state. The larger the query domain, the longer the convergence. Summarization naturally bounds query propagation because routers receiving a summary have no knowledge of individual prefixes beyond that summary, preventing them from being queried about specifics they don’t track.

This design technique is emphasized in CCDE v3.1 because:

Summarization reduces the query scope.

Faster convergence happens as fewer routers process queries.

Hierarchical design is enabled for stability and scalability.

Why other options are incorrect:

A: Distribute lists filter prefixes but don't reduce query propagation.

B & C: Triangulated or squared physical topology doesn’t control protocol-level query scope.

E: Default routes may help limited routing domains but don’t optimize EIGRP convergence specifically.

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