显示标签为“E20-918”的博文。显示所有博文
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2013年8月28日星期三

Guide de formation plus récente de EMC E20-918

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Code d'Examen: E20-918
Nom d'Examen: EMC (IT-as-a-Service Expert Exam for Cloud Architects)
Questions et réponses: 98 Q&As

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NO.1 The marketing line of business of an enterprise has deployed web services within a private cloud. They
wish to provide additional web services elastically and distribute them around the globe using a public
cloud provider.
The web services have a loosely coupled design and have no content dependencies on any resources in
the private cloud. They are created from a standard PaaS template, which includes an intrusion
prevention system that periodically polls a central management server for security updates. The IPS
management server is located within the private cloud. No layer 2 connectivity exists between the private
and public clouds. The consumers of these web services are distributed across the globe.
Which solution would you recommend to best support the web service elasticity and to minimize service
network latency for the consumer?
A. Implement an encrypted VPN tunnel between the private and public clouds.
B. Implement a global load balancing service as a front-end for the web services.
C. Increase bandwidth between the private cloud and the Internet.
D. Deploy a central database server to consolidate web service content.
Answer: B

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NO.2 An enterprise decided to place some sensitive data in the public cloud and implemented security
mechanisms to protect this data.
Recently the public cloud provider's systems had a security breach. The enterprise was not concerned
because they felt their data had been completely protected. All of the services housing the data are
protected by an IPS application and no alerts were generated by the system.
How did the enterprise protect its data?
A. All data in the public cloud environment was encrypted at-rest and in-transit. The encryption
keys were under complete control of the enterprise and were not available to the public provider.
The cloud provider's logs showed that the enterprise's services were copied.
B. All data in the public cloud environment was encrypted at-rest and in-transit. Copies of the
encryption keys were secured by the public cloud provider in case they were lost.
The cloud provider's logs showed that the enterprise's services were neither accessed nor copied.
C. All data in the public cloud environment was encrypted in-transit only. The encryption keys were
under complete control of the enterprise and were not available to the public provider.
The cloud provider's logs showed that the enterprise's services were copied.
D. All data in the public cloud environment was encrypted at-rest only. The encryption keys were
under complete control of the enterprise and were not available to the public provider.
The cloud provider's logs showed that the enterprise's services were copied.
Answer: A

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NO.3 A financial company has made several acquisitions within the past few years. They currently have two
primary data centers that are 50 km apart. Recently, an internal assessment was conducted to explore
ways to improve ingress/egress utilization and to extend their firewall to the cloud.
Which type of firewall would best suit their needs?
A. Reverse proxy servers
B. Federated
C. Load balanced reverse proxy servers
D. Linked VPN
Answer: B

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NO.4 The IT group within a manufacturing organization is transforming their manual service offerings into
automated service offerings to be available from a service catalog. After reviewing the required KPIs for
the service, the service transition project manager asks you if the monitoring tools they currently employ
need to be replaced.
What criteria are needed to effectively monitor the required KPIs?
A. Can they measure, gather, analyze, and present the required metrics?
B. Can they control, automate, monitor and manage all elements of the service?
C. Can they provide end-to-end support of the services?
D. Can they integrate with the orchestration engine to provide automation?
Answer: A

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NO.5 A large service provider is designing a solution to protect itself against malicious content, such as
viruses in a SOAP attachment, and denial of service attacks.
Which type of firewall is most appropriate for their needs?
A. Linked VPNs
B. Federated
C. Reverse proxy servers
D. XML
Answer: D

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NO.6 An enterprise has decided to implement a new service that will process credit card information. They
will deploy this service within their private cloud. They have a relationship with a public cloud provider that
claims to be PCI compliant.
The enterprise wishes to implement a service that is PCI compliant with the least amount of effort. The
service is protected by a policy-based intrusion detection system. Cardholder data is securely transmitted
to the web interface.
Which additional design elements would best be suited for this implementation?
A. The card number is masked as it is typed and is immediately encrypted and securely sent directly to
the credit card processing system. No credit card information is stored within the application.
B. The card number is masked as it is typed and is immediately encrypted, stored, and securely sent
directly to the credit card processing system. Credit card information is stored within the public cloud
provider using AES 128 encryption.
C. The card number is masked as it is typed and is immediately encrypted and securely sent directly to
the credit card processing system. Credit card information is backed up to the private cloud system and
stored using AES 128 encryption.
D. The card number is masked as it is typed and is immediately encrypted and securely sent to both the
credit card processing system and to private cloud for historical tracking and reporting only.
Answer: A

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NO.7 An IT organization is currently 80% virtualized and the CIO is planning for the transition to ITaaS.
Senior executives are concerned that IT supports too many services and that many of the services are
neither efficient nor necessary.
What argument can the CIO make to address the executives' concerns and convince them that ITaaS is
the correct strategic decision?
A. ITaaS promotes the rationalization of services currently being offered by IT and offers the services that
provide business value through the service catalog.
B. A CMDB can be utilized during the instantiation of the services to improve service levels for the
consumers of IT services.
C. ITaaS offers an opportunity to evaluate whether certain IT services should be sourced with a public
cloud service provider.
D. ITaaS promotes the concept of on-demand self-service, allowing consumers to use only the services
from which they can derive business value.
Answer: A

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NO.8 Which metric measures the time taken to realize benefits from an ITaaS solution?
A. Time-to-value
B. Time-to-live
C. Time-to-deliver
D. Time-to-deploy
Answer: A

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NO.9 The first phase of new ITaaS service introduces the offering to 10% of the engineering organization. The
IT organization leverages the management tools used in their traditional data center processes to provide
visibility into silos and control of the infrastructure. They also have adapted some ITSM concepts as a
framework for their management practices.
During the initial phase of the service deployment, a problem was encountered in one of the VMs.
The IT organization is concerned about the extensive amount of time and resources spent determining
the cause of the issue.
What is the most likely reason it takes more time than expected to resolve the problem?
A. The legacy management tools do not have the capability to provide a holistic view of the service
instance
B. The expertise of the service desk personnel is inadequate to properly handle service related issues
C. The complex nature of orchestration and automation makes problem identification and root cause
analysis unlikely.
D. The cultural hurdles that span organizational silos have not been addressed and resolved.
Answer: A

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NO.10 A manufacturing company hired you to help them in their journey to a hybrid cloud. You conduct an
assessment and recommend migrating several existing Tier 2 applications to a public cloud provider. You
must work within the following constraints:
-Migration can be performed only during weekends -Only limited downtime is acceptable -The
configuration of the host and applications cannot be changed -The company needs to keep the costs as
low as possible -Although there are no specific performance requirements, they are concerned about the
quality
of the user experience
Which solution best addresses these needs?
A. Layer 2 extension with VPN connection over Internet with WAN optimization
B. Layer 3 connection over Internet with QoS
C. Layer 3 connection over Internet with WAN optimization
D. Layer 2 extension with dedicated link and WAN optimization
Answer: A

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NO.11 An organization wishes to move toward full ITaaS implementation. Their IT team is skilled, disciplined,
and exhibits strong teamwork. They have demonstrated the ability to deliver services with supporting
processes and regulations.
As their ITaaS consultant, you need to take them to the next level in the service orientation maturity model.
What is the next level?
A. Service Aligned
B. Service Aware
C. Service Capable
D. Service Neutral
Answer: A

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NO.12 A large enterprise has several applications deployed in a hybrid cloud. Ever since the hybrid cloud was
deployed, the enterprise network operations center has never been able to fully reconcile network and
audit logs.
What should be investigated first as the possible source of the issue?
A. Confirm time is synchronized between locations
B. Filtering false positives
C. Exposing management APIs
D. Tenant in-control versus provider in-control differences
Answer: A

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NO.13 An enterprise company has a large, virtualized data center. They are currently in the process of auditing
their virtual servers to ensure they are in compliance with regulatory requirements.
They want to be able to check new and existing virtual servers for compliance and automatically
remediate any virtual machines that are found to be out of compliance.
As a Cloud Architect, which product would you recommend for this purpose?
A. Cisco Intelligent Automation for Cloud (CIAC)
B. VMware vCenter Orchestrator
C. VMware vCenter Configuration Manager
D. RSA Archer eGRC Platform
Answer: C

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NO.14 A company is deploying a major new business application. The company has difficulty managing the
software development lifecycle. As a result, the time from generating requirements to operational delivery
is significant.
Which best addresses the company s need for shorter release cycles and better code quality?
A. Implement common collaboration tools
B. Utilize configuration management methodologies
C. Use of common automation and orchestration processes
D. Transition to a DevOps culture
Answer: D

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NO.15 A hosting company has experienced a sudden increase in customer interest and wishes to implement
ITaaS. They are now hosting online shopping applications for several retail computer and electronics
companies.
Developers in the customer companies use their own internal credentials and have the ability to publish
applications and changes to their stores. Shoppers access these stores using a variety of mobile
applications and web browsers.
What should be addressed when migrating to ITaaS and implementing a service catalog for the retail and
electronic companies?
A. Integration with different authentication systems
B. Support for several different CMDB systems
C. Integration of multiple hypervisors
D. On-demand resource pool creation
Answer: A

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2013年7月28日星期日

Guide de formation plus récente de EMC E20-326 E20-885 E20-895 E20-918

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Code d'Examen: E20-326

Nom d'Examen: EMC (Symmetrix Solutions Design Exam)

Questions et réponses: 132 Q&As

Code d'Examen: E20-885

Nom d'Examen: EMC (VNX Solutions Expert Exam for Implementation Engineers)

Questions et réponses: 163 Q&As

Code d'Examen: E20-895

Nom d'Examen: EMC (Backup Recovery - Avamar Expert Exam for Implementation Engineers)

Questions et réponses: 106 Q&As

Code d'Examen: E20-918

Nom d'Examen: EMC (IT-as-a-Service Expert Exam for Cloud Architects)

Questions et réponses: 98 Q&As

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NO.1 A customer plans to connect ESXi 5.0 hosts to a new EMC VNX array. They want to take advantage of
the hardware-assisted locking feature in VAAI. Which is a feature of hardware-assisted locking?
A. Locking at the block level of a logical unit
B. Locking the LUN instead of the block level
C. Accessing a block from multiple hosts at the same time
D. Automatic enabling of safe data caching
Answer: A

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NO.2 A customer recently upgraded from vSphere v4.x to vSphere v5.0 to benefit from new VMFS-5 features
for their existing DataStore1 ¯ and DataStore2 ¯ datastores on an EMC VNX. A second identically
configured VNX was implemented and the customer created two additional datastores on the new VNX.
After monitoring the environment, the customer notices the VMs on DataStore1 ¯ and DataStore2 ¯
are not using the same sub-block structure as the two new datastores.
What is the reason for this behavior.?
A. The old VMs are on an upgraded VMFS-5 datastore.
B. The old VMs are still running old VMware tools.
C. The new VMFS-5 features need to be licensed and activated.
D. The new VMFS-5 cannot support two VNX storage systems.
Answer: A

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NO.3 Click on the calculator icon in the upper left-hand corner.
A SQL database requires 1,000 I/O per second with 85% reads and 15% writes. If RAID 1/0 is used, what
is the total number of spindles required to generate the required I/O per second?
A. Ten 10K drives
B. Four 15K drives
C. One Flash drive
D. Fourteen 7.2K drives
Answer: A

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NO.4 A client has an EMC VNX configured with four storage ports, four 15-drive DAEs (disk array
enclosures) and a total of forty drives (20 NL-SAS and 20 SAS drives). The client is using RAID 5 (4+1)
RAID groups with a traditional LUN configuration.
What is the recommended SAS LCC port configuration for optimal performance?
A. Distribute drives evenly across all ports
B. Distribute drives on all odd ports
C. Distribute drives on all even ports
D. Distribute drives on a single port
Answer: A

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NO.5 You are planning a CIFS DR solution for two existing EMC VNX. Each VNX has dual Control Stations.
Each VNX is also configured for a RecoverPoint protection solution on other VNX LUNs that are non-file
related. What recommendation would you give the customer concerning the CIFS DR solution?
A. Configure IP aliasing on the Control Stations for both source and destination VNX systems before
configuring VNX Replicator
B. Configure IP aliasing on the Control Stations for both source and destination VNX systems after
configuring VNX Replicator
C. Configure IP aliasing on the source VNX system Control Stations before configuring VNX Replicator,
and then configure IP aliasing on the destination VNX system Control Stations after configuring VNX
Replicator.
D. Configure IP aliasing on the source VNX system Control Stations before configuring VNX Replicator
and use RecoverPoint to provide protection of the source VNX Control Stations to the destination VNX.
Answer: A

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NO.6 A customer requires an asynchronous DR solution for an NFS-only client environment. The customer
wants the solution to be simple to implement. It was recommended they create a single NIS domain, and
use several NIS servers to provide centralized authentication to the NFS clients at both the source and
destination sites. The customer asks you whether they should consider using VDMs in this environment.
What do you advise?
A. VDMs would offer no advantages to this environment.
B. VDMs allow VMWare integration of NFS service environments.
C. VDMs eliminate the need for Usermapper in NFS environments.
D. VDMs allow for assignment of specific CPUs to a NFS server.
Answer: A

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NO.7 A customer recently purchased an EMC VNX to be connected to four ESXi 5.0 hosts via FC. Five of the
associated VMs (virtual machines) are running SQL Server 2008 R2. To avoid contention, the customer
wants the VM's database and log drives on separate datastores.
Which ESXi 5.0 feature would satisfy this requirement?
A. Network interface card teaming
B. Virtual Machine Anti-Affinity
C. Raw Device Mappings
D. VMDK Affinity
Answer: B

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NO.8 A storage administrator reports they are unable configure SAN Copy connections between two VNX.
The required cabling is in place and zoning is correct, but the SP connections still do not appear in
Unisphere Manager. What could have caused this issue?
A. SAN Copy is not installed on both VNX arrays.
B. SAN Copy is only licensed for local copies.
C. The SP ports are already being used by hosts.
D. Both VNX arrays are not in the same domain.
Answer: D

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NO.9 A customer has a Windows-only environment connected to an EMC VNX for File at their main campus
site. The customer plans to install a new EMC VNX at a remote branch office site. The new VNX will be
used to implement a DR solution for their main campus VNX using several deduplicated file systems
shared and available to clients via CIFS.
Which solution do you recommend to the customer?
A. Use VNX Replicator to replicate the VNX VDMs and associated file systems from the main campus site
to the VNX system at the branch office site to provide an asynchronous DR solution.
B. Use VNX Replicator to replicate the VNX VDMs and associated file systems from the main campus site
to the VNX system at the branch office site to provide a synchronous DR solution.
C. Use VNX SAN Copy to replicate the VNX block devices associated with the VNX file systems from the
main campus site to the VNX system at the branch office site to provide a synchronous DR solution.
D. Use VNX MirrorView/A to replicate the VNX block devices associated with the VNX file systems from
the main campus site to the VNX system at the branch office site to provide an asynchronous DR solution.
Answer: A

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NO.10 A customer has an Oracle ASM database on an EMC VNX with FAST Suite enabled. They observe
intermittent performance degradation due to momentary data hot spots caused by bursty transaction rates.
What recommendation would you make to help alleviate these hot spots?
A. Enable Fast VP on the ASM LUNs
B. Modify the ASM rebalance power priority
C. Enable Fast Cache on the ASM LUNs
D. Disable ASM storage management
Answer: C

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NO.11 An administrator is attempting to vMotion a VM from one vSphere ESXi 5.0 host to another. The ESXi
servers are connected to three VNX arrays on the fabric. The vMotion fails. What is the most likely
reason?
A. RDMs are attached to the VM with different host LUN numbers on the ESXi servers.
B. There are active SnapView sessions on the VM preventing the vMotion.
C. RDMs are in physical compatibility mode and not eligible for vMotion.
D. There are active MirrorView sessions on the VM preventing the vMotion.
Answer: A

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NO.12 A customer wants to replicate a CIFS environment from a legacy EMC Celerra to a new EMC VNX.
Users are able to access CIFS shares from both arrays. The CIFS shares are on different networks and
replication is not running. The customer wants to make sure there will be no network restrictions
preventing replication between the data movers on two different networks.
What TCP ports should they ask the network team to open?
A. 8888, 8887, 5081
B. 80, 443, 8080
C. 5057, 445, 5087
D. 23, 25, 22
Answer: A

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NO.13 A customer has two EMC VNX configured to replicate between sites. Each VNX has dual Control
Stations. The primary Control Station at the source site fails at 6 p.m. and reboots. At 8 p.m., the customer
completes DR testing and observes CIFS replication does not failover to the target site VNX. Why does
CIFS replication not failover to the target VNX during the DR test?
A. The control station of the primary VNX should have been failed back.
B. The control station of the second VNX should have been failed over.
C. The control station of the primary VNX should have IP bounding enabled.
D. The control station of the secondary VNX should have IP bounding enabled.
Answer: A

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NO.14 A customer has two identically configured Linux hosts (OS version, memory, CPU) attached to the
same network. One host is NFS-attached and the other is FC-attached to an EMC VNX. Both the NFS file
systems and the SAN LUNs are created from four RAID 5 (4+1) RAID groups. LUNs are not shared
between file and block.
The customer reports NFS-attached host is able to achieve much greater throughput via NFSv4 versus
the FC-attached host.
What is the source of the performance difference between the file and block configurations?
A. FC encapsulation overhead
B. I/O size
C. Host Patch levels
D. NFS version
Answer: B

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NO.15 A customer requests a performance review of their EMC VNX before FAST Cache is implemented.
You notice a dedicated LUN has a write size of 4 KB, and the disks are performing writes of 8 KB. What is
causing this behavior?
A. Coalescing
B. Pre-fetching
C. Flushing
D. Promotion
Answer: A

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NO.16 A customer has two EMC VNX, one at the primary site and the other at a DR site located 100 km away.
The WAN connection between sites is a 100 Mb/s dark fiber link with 4 ms latency.
A previous storage administrator configured the pool LUNs for the file system on thin LUNs. The file
system is growing at a rate of 500 GB per week and is on a VDM. The new storage administrator reports
performance issues with the file system.
What is the most likely reason for the performance issue?
A. Thin LUNs are used for the file system.
B. The WAN link should be upgraded to an eLAN.
C. The VNX system requires an upgrade.
D. The file system has too many concurrent users connected.
Answer: A

EMC   E20-885   E20-885

NO.17 A system administrator wants to migrate medical-imaging data stored on an EMC VNX. The host
connects to the VNX via iSCSI. The IP SAN infrastructure has recently been updated to support 1 Gb/10
GB switching. The system administrator wants to maximize data transfer performance. What would you
recommend?
A. Implement 10 Gb/s iSCSI connection using a 9000 byte frame.
B. Use a 4 KB memory page size.
C. Implement 10 Gb/s iSCSI connection using a 2400 byte frame.
D. Increase the write-aside value.
Answer: A

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NO.18 A customer has two identically configured Linux hosts (OS version, memory, CPU) attached to the
same network. One host is NFS-attached and the other is FC-attached to an EMC VNX. Both the NFS file
systems and the SAN LUNs are created from four RAID 5 (4+1) RAID groups. LUNs are not shared
between file and block and each host generates the same size I/O.
The customer reports the FC-attached host is able to achieve much greater throughput than the
NFS-attached host.
What is the source of the performance difference between the file and block configurations?
A. FC encapsulation overhead
B. Host Patch levels
C. Ethernet Network
D. NFS version
Answer: C

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NO.19 A customer has a CIFS DR solution with EMC VNX using a One-to-Many replication topology. The
customer asks you to explain replication behavior under the following conditions:
Production site failover or switchover to a DR site
Replication start and reverse is performed
What would you advise the customer?
A. The original production site remains a One-to-Many replication source for the other remaining DR sites.
B. All remaining replications sessions to the other DR sites are suspended.
C. The original production site goes into cascade mode to remain a replication source for the remaining
DR sites.
D. The DR site becomes the replication source for the remaining DR sites and the original production site
is marked as invalid.
Answer: C

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NO.20 A Pool used for FAST VP has the following configuration:
Flash drives: 1,000 GB, with 1,000 GB free
SAS drives: 5,000 GB, with 2,500 GB free
NL-SAS drives: 20,000 GB, with 11,500 GB free
The tiering policy is set to Auto. An additional 600 GB of new data is written to the Pool.
What is the data distribution after the data is written?
A. Flash drives: 960 GB free SAS drives: 2,400 GB free NL-SAS drives: 11,040 GB free
B. Flash drives: 400 GB free SAS drives: 2,500 GB free NL-SAS drives: 11,500 GB free
C. Flash drives: 900 GB free SAS drives: 2,000 GB free NL-SAS drives: 11,500 GB free
D. Flash drives: 970 GB free SAS drives: 2,350 GB free NL-SAS drives: 11,080GB free
Answer: A

EMC   E20-885   E20-885