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Q11. In a cloud design, an architect has defined a separate trust zone for host management. The hosts will be running open source hypervisors.
What should be included in the design deliverables to support this separate trust zone?
A. Isolated management network and a common super-user account
B. Separate PKI and encrypted CMI portal access
C. Separate authentication source and a preferred zone set
D. Isolated management network and a separate authentication source
Answer: D
Q12. An architect is designing the compute resource pools for a cloud. As part of the deliverables, the architect has included the standard specifications for the physical servers to be used. The organization has provided estimates for future growth but has concerns about whether these estimates are accurate. What should be included in the design to address these concerns?
A. A monitoring application and procedures for pool expansion
B. A chargeback application and orchestration workflows to auto-scale pools
C. A metering application and orchestration workflows to auto-scale pools
D. A configuration management application and procedures for pool expansion
Answer: A
Q13. Which categories of network traffic should be isolated from inter-host communication and each other?
A. Logging and messaging
B. Cloud services and administration
C. Administration and storage
D. Messaging and storage
Answer: B
Q14. When implementing QoS across a cloud network, how is storage traffic usually prioritized?
A. Most important
B. More important than tenant traffic but less important than management traffic
C. More important than management traffic but less important than tenant traffic
D. Least improtant
Answer: C
Q15. A cloud architect has determined that the cloud management infrastructure requires an authentication and PKI environment. In addition, each tenant will require its own authentication and PKI environment. What describes these separate environments in a cloud design document?
A. Availability zones
B. Fault domains
C. Multi-tenancy
D. Trust zones
Answer: C
Explanation: The term "software multitenancy" refers to a software architecture in which a single instance of software runs on a server and serves multiple tenants. A tenant is a group of users who share a common access with specific privileges to the software instance.
Incorrect:
Not A: Availability zones (AZs) are isolated locations within data center regions from which public cloud services originate and operate.
Not B: A fault domain is a set of hardware components - computers, switches, and more - that share a single point of failure.
Not D: Zones of trust are a defined area of the system where by by necessity, by the presence of key information assets and by the wider environmental context the connections within the zone are treated as at the same level of trust. This effectively couples the components within that subsystem for security purposes.
References:
https://en.wikipedia.org/wiki/Multitenancy
Q16. An organization has internal applications that require block, file, and object storage. They anticipate the need for multi-PB storage within the next 18 months. In addition, they would prefer to use commodity hardware as well as open source technologies. Which solution should be recommended?
A. Cinder
B. Hadoop
C. Swift
D. Ceph
Answer: C
Explanation: OpenStack Swift Object Storage on EMC Isilon
EMC Isilon with OneFS 7.2 now supports OpenStack Swift API. Isilon is simple to manage, highly scalable (up to 30PB+ in a single namespace) and highly efficient (80%+ storage utilization) NAS platform.
Explanation: References:
http://samuraiincloud.com/2014/11/26/openstack-swift-object-storage-on-emc-isilon/
Q17. An organization wants to deploy a block storage in the cloud using a storage array that is accessible through the iSCSI protocol. The hosts support iSCSI.
Why would network segmentation be included in the design to support this requirement?
A. Secure all traffic between the storage array and the hosts
B. Enable CHAP between the array and hosts
C. iSCSI traffic is not supported on networks with other types of traffic
D. Enable LUN masking capabilities of the array
Answer: D
Explanation: LUN masking is a further constraint added to LUN zoning to ensure that only devices authorized to access a specific server can access the corresponding port.
A logical unit number (LUN) is a unique identifier that designates individual hard disk devices or grouped devices for address by a protocol associated with a SCSI, iSCSI, Fibre Channel (FC) or similar interface. LUNs are central to the management of block storage arrays shared over a storage area network (SAN).
Explanation: References:
http://searchvirtualstorage.techtarget.com/definition/LUN-masking
Q18. An organization plans to deploy a spine/leaf network topology to support a cloud design. Leaf switches will use layer- 3 protocols to communicate with the spine switches. Hosts will each connect to two leaf switches using layer-2 protocols.
Which technology must be enabled between the host and leaf switches to provide the maximum throughput for a single data stream?
A. Generic Network Virtualization Encapsulation
B. Spanning Tree Protocol
C. Equal-Cost Multi-Path Routing
D. Multi-Chassis Aggregation
Answer: A
Explanation: Generic Network Virtualization Encapsulation (Geneve) is the peacemaking protocol drafted to unify VXLAN, NVGRE, and whatever other tunneling protocols emerge for network virtualization. Geneve doesn't exactly replace VXLAN and other protocols. Rather, it provides a common superset among them, so that outside software can provide hooks to Geneve rather than having to accommodate multiple encapsulation standards.
Note: NVGRE (Network Virtualization using Generic Routing Encapsulation) is a network virtualization technology that attempts to alleviate the scalability problems associated with large cloud computing deployments. It uses Generic Routing Encapsulation (GRE) to tunnel layer 2 packets over layer 3 networks. Its principal backer is Microsoft. Explanation:
References:
https://www.sdxcentral.com/articles/news/intel-supports-geneve-unify-vxlan-nvgre/2014/09/
Q19. An organization plans to deploy a spine/leaf network topology to support a cloud design. Leaf switches will use layer- 3 protocols to communicate with the spine switches. Hosts will each connect to two leaf switches using layer-2 protocols.
Which technology must be enabled between the host and leaf switches to provide the maximum throughput for a single data stream?
A. Generic Network Virtualization Encapsulation
B. Spanning Tree Protocol
C. Equal-Cost Multi-Path Routing
D. Multi-Chassis Aggregation
Answer: A
Explanation: Generic Network Virtualization Encapsulation (Geneve) is the peacemaking protocol drafted to unify VXLAN, NVGRE, and whatever other tunneling protocols emerge for network virtualization. Geneve doesn't exactly replace VXLAN and other protocols. Rather, it provides a common superset among them, so that outside software can provide hooks to Geneve rather than having to accommodate multiple encapsulation standards.
Note: NVGRE (Network Virtualization using Generic Routing Encapsulation) is a network virtualization technology that attempts to alleviate the scalability problems associated with large cloud computing deployments. It uses Generic Routing Encapsulation (GRE) to tunnel layer 2 packets over layer 3 networks. Its principal backer is Microsoft. Explanation:
References:
https://www.sdxcentral.com/articles/news/intel-supports-geneve-unify-vxlan-nvgre/2014/09/
Q20. An organization wants to deploy SaaS applications in their cloud. The SaaS applications will be using application HA to maintain up-time levels of 99.9%.
What should the cloud architect include in the design to support this up-time requirement?
A. Sufficient host capacity
B. Quorum disks
C. Replication licenses for hypervisors
D. HA licenses for hypervisors
Answer: D
