Explanation: The recovery service level (RSL) measures the percentage of operations that would be recovered during a BCDR situation. The recovery point objective (RPO) sets and defines the amount of data an organization must have available or accessible to reach the determined level of operations necessary during a BCDR situation. The recovery time objective (RTO) measures the amount of time necessary to recover operations to meet the BCDR plan. SRE is provided as an erroneous response.

Explanation: The Dynamic Host Configuration Protocol (DHCP) automatically configures network settings for a host so that these settings do not need to be configured on the host statically. Given the rapid and programmatic provisioning of resources within a cloud environment, this capability is crucial to cloud operations. Both DNS and its security-integrity extension DNSSEC provide name resolution to IP addresses, but neither is used for the configuration of network settings on a host. DCOM refers to the Distributed Component Object Model, which was developed by Microsoft as a means to request services across a network, and is not used for network configurations at all.

Explanation: Fault tolerance allows a system to continue functioning, even with degraded performance, if portions of it fail or degrade, without the entire system or service being taken down. It can detect problems within a service and invoke compensating systems or functions to keep functionality going. Although redundancy is similar to fault tolerance, it is more focused on having additional copies of systems available, either active or passive, that can take up services if one system goes down. Elasticity pertains to the ability of a system to resize to meet demands, but it is not focused on system failures. Automation, and its role in maintaining large systems with minimal intervention, is not directly related to fault tolerance.

Explanation: An XML firewall is most commonly deployed in line between the firewall and application server to validate XML code before it reaches the application. An XML firewall is intended to validate XML before it reaches the application. Placing the XML firewall between the presentation and application layers, between the firewall and IPS, or between the application and data layers would not serve the intended purpose.

Explanation: With a federated identity system, a user will perform authentication with their home organization, and the application will accept the authentication tokens and user information from the identity provider in order to grant access. The purpose of a federated system is to allow users to authenticate from their home organization. Therefore, using the application or a third-party authentication system would be contrary to the purpose of a federated system because it necessitates the creation of additional accounts. The use of a cloud provider would not be relevant to the operations of a federated system.

Explanation: DNSSEC is an extension of the normal DNS protocol that enables a system to verify the integrity of a DNS query resolution by signing it from the authoritative source and verifying the signing chain. It is not used for securing data transmissions or exchanges. HTTPS is the most common method for securing web service and data calls within a cloud, and TLS is the current standard for encrypting HTTPS traffic. VPNs are widely used for securing data transmissions and service access.

Explanation: With the entire software platform being controlled by the cloud provider, the standardization of configurations and versioning is done automatically for the cloud customer. This alleviates the customer’s need to track upgrades and releases for its own systems and development; instead, the onus is on the cloud provider. Although licensing is the responsibility of the cloud customer within SaaS, it does not have an impact on compliance requirements. Within SaaS, development and maintenance of the system are solely the responsibility of the cloud provider.

Explanation: Volume storage is allocated and mounted as a virtual hard drive within IaaS implementations, and it can be maintained and used the same way a traditional file system can. Object storage uses a flat structure on remote services that is accessed via opaque descriptors, structured storage resembles database storage, and unstructured storage is used to hold auxiliary files in conjunction with applications hosted within a PaaS implementation.

Explanation: With a Type 1 hypervisor, the hypervisor software runs directly on top of the bare-metal system, without any intermediary layer or hosting system. None of these statements describes a Type 1 hypervisor.

Explanation: The American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) recommends 64.4 to 80.6 degrees Fahrenheit (or 18 to 27 degrees Celsius) as the optimal temperature range for data centers. None of these options is the recommendation from ASHRAE.