[2021-New] EMC E20-020 Dumps With Update Exam Questions (31-36)

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Q1. An organization wants to deploy a service catalog in a private cloud. What requirements are met by using a service catalog?

A. Ability for administrators to manage multi-tenancy

B. Ability for users to measure service performance

C. Ability for users to aggregate service logs

D. Ability for administrators to attach storage pools

Answer: B

Explanation: Benefits of implementing and maintaining a service catalog include allowing an enterprise to track and manage metrics that represent the utilization of services and service-related traits, such as those associated with service supply and demand.

References:

https://en.wikipedia.org/wiki/Service_catalog

Q2. What needs to be considered when designing a distributed storage solution?

A. Multiple management tools

B. Fault domain detection and isolation to ensure data availability

C. RAID configuration to ensure a drive failure is avoided

D. Automated storage tiering to enable efficient use of drive

Answer: B

Explanation: A distributed data store is a computer network where information is stored on more than one node, often in a replicated fashion. Distributed data stores typically use an error detection and correction technique. Some distributed data stores (such as Parchive over NNTP) use forward error correction techniques to recover the original file when parts of that file are damaged or unavailable. Others try again to download that file from a different mirror. Explanation:

References: https://en.wikipedia.org/wiki/Distributed_data_store

Q3. An organization wants to provide backup services in the cloud. They have no backup infrastructure in place. The organization has concerns about losing data if a site disaster occurs. They want to maintain control of backup data placement because of data privacy laws. Finally, they want to maintain at least one month's worth of backups onsite. Which backup solution will meet these requirements?

A. Local backup

B. Remote backups

C. Local backup with replication

D. Local backups with cloud gateway

Answer: D

Explanation: Cloud gateway allows EMC customers to move on-premise data from EMC arrays to public cloud storage providers. Clod gateway facilitate data migration from on-premises to a public cloud storage service to create a true hybrid cloud storage environment.

Cloud gateways such as Riverbed's SteelStore (formally known as Whitewater) can act as a local backup target for funneling data to a storage cloud for offsite storage.

Explanation: References:

http://blogs.forrester.com/henry_baltazar/14-07-09-gateways_will_accelerate_data_migration_to_the_cloud

Q4. 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

Q5. An organization plans to build a cloud using some of the existing data center infrastructure. Specifically, they want to use the existing FC storage infrastructure to support cloud hosts. However, they want to logically separate the cloud storage traffic from the existing data center storage traffic within this infrastructure. Which mechanism can be used to meet this requirement?

A. MPIO

B. VLAN

C. VSAN

D. Masking

Answer: D

Explanation: The use of VSANs allows the isolation of traffic within specific portions of the network. If a problem occurs in one VSAN, that problem can be handled with a minimum of disruption to the rest of the network. VSANs can also be configured separately and independently.

Note: Virtual storage area network (VSAN) is a collection of ports from a set of connected Fibre Channel switches, that form a virtual fabric. Ports within a single switch can be partitioned into multiple VSANs, despite sharing hardware resources. Conversely, multiple switches can join a number of ports to form a single VSAN.

Incorrect:

Not A: Microsoft Multipath I/O (MPIO) is a Microsoft-provided framework that allows storage providers to develop multipath solutions that contain the hardware-specific information needed to optimize connectivity with their storage arrays.

MPIO is protocol-independent and can be used with Fibre Channel, Internet SCSI (iSCSI), and Serial Attached SCSI (SAS) interfaces in Windows Server® 2008, Windows Server 2008 R2 and Windows Server 2012.

Not D: Logical Unit Number Masking or LUN masking is an authorization process that makes a Logical Unit Number available to some hosts and unavailable to other hosts. LUN masking operates at Layer 4 of the Fibre Channel protocol.

Reference: https://en.wikipedia.org/wiki/VSAN

Q6. 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