400-007 Exam Dumps - Cisco Certified Design Expert (CCDE v3.1)

Comprehensive and Detailed Explanation:

A: Data sovereignty refers to legal and regulatory policies that require data to reside within a particular country and be subject to its laws. This impacts how cloud and hybrid architectures are designed and which regions can be used for storage or compute.

Other options:

B: “Data rationality” is not a recognized regulatory or legal term.

C: Data inheritance refers to metadata or permission models, not legal jurisdiction.

D: Data replication is a technical process, not a legal requirement.

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To split an Ethernet domain and ensure isolation of configuration and topology changes, the key mechanism is separating the VLAN management domains. This is achieved through:

VTP (VLAN Trunking Protocol) domain separation

Each VTP domain controls its own set of VLAN information and will not propagate VLAN changes across domain boundaries. By assigning unique VTP domain names to each half of the network, administrators prevent unintended synchronization of VLANs between switches.

Other options:

B. VTP password: Adds security but does not separate domains.

C. STP type: All switches in the domain can run the same or different STP versions and still be part of the same Ethernet domain.

D. VLAN ID: These can overlap across domains; uniqueness is not required to split domains.

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B (Strong cryptography for cardholder data):PCI DSS requires strong cryptographic protocols (e.g. TLS 1.2 or higher) to protect sensitive data during processing and storage.

C (Strong encryption for transmission):Data-in-transit across public or untrusted networks must be encrypted using strong protocols to comply with PCI DSS.

Other options explained:

A/D/E: These are general security best practices but not directly tied to TLS upgrade compliance for cardholder data under PCI DSS.

D (EoMPLS - Ethernet over MPLS):EoMPLS allows Layer 2 extension across MPLS without IP addressing or routing changes, preserving VLANs and broadcast domains — ideal for extending CCTV networks transparently.

Other options explained:

A: GRE encapsulates Layer 3, requiring IP configurations.

B: L2TPv3 is possible but not common over MPLS SP networks.

C: VXLAN is more suited for data center overlays, not WAN/MPLS integration.

B (Separation of infrastructure and policy):SD-WAN decouples policy control from the underlying transport.

C (Simpler policy-based forwarding):Centralized controllers dynamically steer traffic according to application policies with less complexity than traditional QoS in MPLS.

Other options explained:

A: FEC (Forward Error Correction) is typically not used in standard SD-WAN implementations.

D: SD-WAN does not unify WAN backbones; it abstracts multiple underlays.

E: Both MPLS and SD-WAN have failure management, but SD-WAN focuses more on dynamic path control than simply backup links.

A (EIGRP summarization):Summarization reduces unnecessary routing information exchange, simplifies the routing table, and improves convergence.

D (Route leaking on London-Rome link):Route leaking allows specific prefixes (such as important routes for direct communication) to be advertised across the London-Rome link, ensuring it's utilized where appropriate.

Other options explained:

B: Filtering routes on Barcelona would prevent reachability unnecessarily.

C: Filtering on London-Rome link would prevent its usage entirely.

Comprehensive and Detailed Explanation:

B: Augmented SDN allows external applications or controllers to interact with the traditional control plane (e.g., RIB or FIB) via APIs, without fully replacing it.

A (replace) removes traditional control protocols entirely.

C (hybrid) uses both SDN and legacy control planes, but without deep integration.

D (distributed) refers to traditional decentralized control planes.

Augmented SDN enhances traditional routing with programmable control, offering near real-time visibility and dynamic response without disrupting the existing control architecture.

B (Layer 3 MPLS VPN hub and spoke):A hub-and-spoke MPLS VPN allows scalable branch-to-data-center communication with efficient routing, simplified management, and adequate support for real-time video across 200 branches.

Other options explained:

A: DMVPN is flexible but not as scalable or deterministic for 200-site enterprise video conferencing.

C: VPLS operates at Layer 2 and may introduce unnecessary broadcast domain scaling challenges.

D: Full mesh MPLS is difficult to manage for such a large number of sites.