Pass the Cisco CCDE v3.0 400-007 Questions and answers with Dumpstech

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The priority queue (strict priority queue) is intended for real-time, delay-sensitive traffic like voice and certain video, which have:

D. Intolerance to jitter: Real-time traffic requires consistent latency.

E. TCP-based application: Many real-time video streams and some financial trading apps use TCP but still require minimal jitter and latency.

CCDE v3.1 emphasizes that strict priority queue should only be used for traffic highly sensitive to delay and jitter to avoid starving other queues.

Why other options are incorrect:

A: HTTP-like small transactions are delay-tolerant.

B: WRED (Weighted Random Early Detection) is used for congestion avoidance, not prioritization.

C: Priority queue is specifically for traffic intolerant to loss and jitter.

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The IS-IS Overload Bit allows a router to signal to its peers that it should be temporarily excluded from SPF calculations for transit traffic:

A: The Overload Bit can be automatically set at startup (known as " startup overload " ) to allow the router sufficient time to converge IGP, BGP, and stabilize protocols before accepting transit traffic.

D: The bit can remain set until all dependent protocols have converged and the router is fully operational.

Why other options are incorrect:

B: The router’s directly connected prefixes remain reachable; only transit path calculations exclude the overloaded node.

C: MPLS-TE does not automatically reoptimize tunnels based on the Overload Bit.

E: There is no specific restriction preventing Overload Bit usage on Route Reflectors.

The primary goal of resilient modular network design is to minimize the operational impact of failures by automating recovery and isolating fault domains.

C: Reducing failures that require manual intervention improves availability, reduces downtime, and ensures stability even under fault conditions.

Why other options are incorrect:

A: This is a limitation to avoid, not a design driver.

B: Minimizing app downtime is an outcome, not the operational driver itself.

D: Development time is not related to operational network resiliency.

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A (IaaS within a private cloud):IaaS allows on-demand scaling of compute and storage resources, and private cloud deployment reduces capital expenditures by pooling hardware resources and increasing utilization, while allowing control over security and compliance.

Other options explained:

B: On-prem IaaS still requires significant CapEx.

C: PaaS delivers platform services, but the scenario is focused on network systems.

D: SaaS on-prem is uncommon and does not address infrastructure scaling.

In IoT environments, especially in manufacturing plants, security is the primary concern during migration:

IoT devices often have limited security capabilities and may introduce vulnerabilities if not properly segmented, authenticated, and monitored.

Manufacturing plants operate critical systems where availability, safety, and integrity are paramount.

CCDE v3.1 emphasizes securing data, devices, and control systems as a top priority during IoT migrations.

Other options explained:

A: Sensors are part of the IoT solution but not the primary migration concern.

C: Applications are important but typically come after securing connectivity and endpoints.

D/E: Infrastructure elements are secondary to security in the migration assessment.

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D (SAML2.0):SAML2.0 is widely used for federated identity management in enterprise environments, supporting Single Sign-On (SSO) across multiple applications and domains.

Other options explained:

A: OAuth2 is primarily for authorization, not identity federation.

B: OpenID Connect extends OAuth2 for authentication but is more common for consumer web apps than enterprise SSO.

C: OpenID is older and largely replaced by OpenID Connect.

C (Synchronous replication across data centers):Synchronous replication ensures zero or near-zero data loss (very low RPO), as data is written simultaneously to both sites. For an RPO of under 10 seconds, synchronous replication is mandatory.

Other options explained:

A: Asynchronous replication may result in higher RPO.

B/D: Single site designs introduce single points of failure for business continuity.