#Explanation:
* C: Using a consistent data protection strategy (encryption at rest/in motion) across environments ensures policy continuity across private and hybrid clouds.
* E: Applying cryptographic protocols (e.g., TLS, IPsec) protects data as it traverses public and hybrid infrastructure.
Other options:
* A: Automation of security scanning is encouraged; avoiding it is counterproductive.
* B: While SSH is secure, it doesn't address full-stack hybrid data protection.

* D (LISP - Locator/ID Separation Protocol):
* Supports massive scale with centralized control plane (mapping servers).
* CE routers do not run routing protocols with PE.
* Allows load balancing and multi-homing using locator sets.
* Supports IPv4 and IPv6.
* Lightweight CE requirements fit low-cost platforms.
Why other options are incorrect:
* A: FlexVPN is control-plane intensive and less scalable for large managed CE deployments.
* B: Point-to-point GRE doesn't scale well with 250,000 CEs.
* C: DMVPN requires routing protocol overlays which violate the requirement.

* C (QoS policy propagation with BGP - QPPB):Allows QoS policies to be dynamically applied based on BGP routing information, integrating policy control into routing decisions.
* D (Remote black-holing trigger):Enables dynamic mitigation of attacks (e.g., DDoS) by injecting blackhole routes through BGP to selectively drop malicious traffic upstream.
Other options explained:
* A/B/E: Static policy mechanisms that lack dynamic flexibility and responsiveness in modern service provider designs.

# Explanation:
* C: As MTTR (Mean Time to Repair) increases due to complex topologies and control plane delays, the likelihood of experiencing overlapping outages (i.e., a second failure occurring before the first is resolved) also increases. This can cascade into a wider outage.
Other options:
* A: Management visibility isn't directly affected by MTTR.
* B: Data plane convergence is generally fast and not as affected as control plane convergence.
* D: Topology changes may still be detected quickly, but the reaction time (recovery) is delayed.

* E (Infrastructure ACLs): iACLs control what traffic can reach network infrastructure devices, directly securing the data plane.
* G (Routing Protocol Authentication): Prevents malicious or spoofed routing updates which directly protect data plane routing decisions.
Why other options are incorrect:
* A: Warning banners are management plane hardening.
* B: Redundant AAA is management/control plane hardening.
* C: CPPr protects the control plane.
* D: SNMPv3 secures management plane.
* F: Disabling unused services typically applies to management plane or control plane, not data plane.
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