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Auto-scaling is correct. With PaaS providing a fully configured and managed framework, auto-scaling can be implemented to programmatically adjust resources based on the current demands of the environment.

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Handshake and record is correct. Transport Layer Security (TLS) uses the handshake protocol to establish and negotiate the TLS connection, and it uses the record protocol for the secure transmission of data.

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Problem management is correct. The focus of problem management is to analyze and identify potential issues and to put processes and mitigations in place to prevent predictable problems from ever occurring in the first place.

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Trust zones is correct. Trust zones can be implemented to separate systems or tiers along logical lines for great security and access controls. Each zone can then have its own security controls and monitoring based on its particular needs.

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Rapid elasticity is correct. Rapid elasticity allows a cloud environment to automatically add or remove resources to or from a system or application based on its current demands. Whereas a traditional data center model would require standby hardware and substantial effort to add resources in response to load increases, a cloud environment can easily and rapidly expand to meet resource demands, so long as the application is properly implemented for it.

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Recoverability is correct. In order for any archiving system to be deemed useful and compliant, regular tests must be performed to ensure the data can still be recovered and is accessible, should it ever be needed, for the duration of the retention requirements.

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Proxy relay is correct. The three main components to a federated identity transaction are the user, identity provider, and the relying party.

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BICSI is correct. The standards put out by Building Industry Consulting Service International (BICSI) primarily cover complex cabling designs and setups for data centers, but they also include specifications on power, energy efficiency, and hot/cold aisle setups.

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Measured service is correct. With measured service, cloud services are delivered and billed in a metered way. The cloud customer only pays for those services they use and the duration of time in which they use them.

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Financial is correct. The SOC Type 2 audits include five principles: security, privacy, processing integrity, availability, and confidentiality.

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All other answers choices are incorrect.