EMC E10-001 Online Practice Questions and Exam Preparation

EMC E10-001 Online Questions & Answers

• Question 141:

  Which fabric service provides information about other logged in nodes after receiving a query from a node?

  A. Fabric controller
  B. Name server
  C. Management server
  D. Fabric login server
  B. Name server

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  Login types in Switched Fabric Fabric services define three login types: Fabric login (FLOGI): Performed between an N_Port and an F_Port. To log on to the fabric, a node sends a FLOGI frame with the WWNN and WWPN parameters to the login service at the predefined FC address FFFFFE (Fabric Login Server). In turn, the switch accepts the login and returns an Accept (ACC) frame with the assigned FC address for the node. Immediately after the FLOGI, the N_Port registers itself with the local Name Server on the switch, indicating its WWNN, WWPN, port type, class of service, assigned FC address and so on. After the N_Port has logged in, it can query the name server database for information about all other logged in ports. Port login (PLOGI): Performed between two N_Ports to establish a session. The initiator N_Port sends a PLOGI request frame to the target N_Port, which accepts it. The target N_Port returns an ACC to the initiator N_Port. Next, the N_Ports exchange service parameters relevant to the session. Process login (PRLI): Also performed between two N_Ports. This login relates to the FC-4 ULPs, such as SCSI. If the ULP is SCSI, N_Ports exchange SCSI-related service parameters. EMC E10-001 Student Resource Guide. Module 5: Fibre Channel Storage Area Network (FC SAN)

• Question 142:

  What is a function of unified management software in cloud computing?

  A. Defining cloud service attributes
  B. Consolidating infrastructure resources scattered across one or more data centers
  C. Metering based on usage of resources by the consumer
  D. Providing an interface to consumers to request cloud services
  B. Consolidating infrastructure resources scattered across one or more data centers

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  Cloud Management and Service Creation Tools

  The cloud management and service creation tools layer includes three types of software:

  

  Physical and virtual infrastructure management software Unified management software

  

  User-access management software

  This classification is based on the different functions performed by these software. These software interact with each other to automate provisioning of cloud services.

  The physical and virtual infrastructure management software is offered by the vendors of various infrastructure resources and third-party organizations. For example, a storage array has its own management software. Similarly, network and physical servers are managed independently using network and compute management software respectively. These software provide interfaces to construct a virtual infrastructure from the underlying physical infrastructure.

  Unified management software interacts with all standalone physical and virtual infrastructure management software. It collects information on the existing physical and virtual infrastructure configurations, connectivity, and utilization. Unified management software compiles this information and provides a consolidated view of infrastructure resources scattered across one or more data centers. It allows an administrator to monitor performance, capacity, and availability of physical and virtual resources centrally. Unified management software also provides a single management interface to configure physical and virtual infrastructure and integrate the compute (both CPU and memory), network, and storage pools. The integration allows a group of compute pools to use the storage and network pools for storing and transferring data respectively.

  The unified management software passes configuration commands to respective physical and virtual infrastructure management software, which executes the instructions. This eliminates the administration of compute, storage, and network resources separately using native management software.

  The key function of the unified management software is to automate the creation of cloud services. It enables administrators to define service attributes such as CPU power, memory, network bandwidth, storage capacity, name and description of applications and platform software, resource location, and backup policy. When the unified management software receives consumer requests for cloud services, it creates the service based on predefined service attributes.

  The user-access management software provides a web-based user interface to consumers. Consumers can use the interface to browse the service catalogue and request cloud services. The user-access management software authenticates users before forwarding their request to the unified management software. It also monitors allocation or usage of resources associated to the cloud service instances. Based on the allocation or usage of resources, it generates a chargeback report. The chargeback report is visible to consumers and provides transparency between consumers and providers. EMC E10-001 Student Resource Guide. Module 13: Cloud Computing

• Question 143:

  What is a characteristic of Big Data?

  A. Structured and unstructured data generated by multiple sources
  B. Structured data generated by a single source
  C. Only unstructured data generated by multiple sources
  D. Structured and unstructured data generated by a single source
  A. Structured and unstructured data generated by multiple sources

• Question 144:

  Which NAS implementation consolidates file-based and block-based access on a single storage platform?

  A. Unified
  B. Scale-out
  C. Gateway
  D. Integrated
  A. Unified

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  NAS Implementation - Unified NAS

  The unified NAS consolidates NAS-based and SAN-based data access within a unified storage platform and provides a unified management interface for managing both the environments.

  Unified NAS performs file serving and storing of file data, along with providing access to block- level data. It supports both CIFS and NFS protocols for file access and iSCSI and FC protocols for block level access. Due to consolidation of

  NAS-based and SAN-based access on a single storage platform, unified NAS reduces an organization's infrastructure and management costs.

  A unified NAS contains one or more NAS heads and storage in a single system. NAS heads are connected to the storage controllers (SCs), which provide access to the storage. These storage controllers also provide connectivity to iSCSI

  and FC hosts. The storage may consist of different drive types, such as SAS, ATA, FC, and flash drives, to meet different workload requirements.

  EMC E10-001 Student Resource Guide. Module 7: Network-Attached Storage (NAS)

• Question 145:

  An organization has deployed an application that has a read-intensive workload. They want to improve application performance by reducing latency and accelerating throughput. What is recommended to address their requirements?

  A. Deploy server flash-caching
  B. Reduce the high watermark
  C. Use a most recently-used algorithm
  D. Disable the prefetch algorithm
  A. Deploy server flash-caching

• Question 146:

  What is a benefit of source-based deduplication over target-based deduplication?

  A. Backup processing is offloaded from the backup client
  B. Less backup data is stored on the backup server
  C. Backup data can be retained longer
  D. Only unique data is sent over the network to be backed up
  D. Only unique data is sent over the network to be backed up

• Question 147:

  What is a feature of cloud-optimized storage?

  A. Provides self-service and metered access to storage resources
  B. Enables massive scalability through the use of intelligent flash cards
  C. Provides a unified namespace to automate the creation of cloud services
  D. Enables secure multi-tenancy through the use of privilege elevation
  A. Provides self-service and metered access to storage resources

• Question 148:

  Which operation writes data in cache, and immediately to disk, before sending an acknowledgement to the host?

  A. Write-through cache
  B. Write-back cache
  C. Write aside cache
  D. Write cache vaulting
  A. Write-through cache

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  Write Operation with Cache

  

  Write operations with cache provide performance advantages over writing directly to disks. When an I/O is written to cache and acknowledged, it is completed in far less time (from the host's perspective) than it would take to write directly to disk. Sequential writes also offer opportunities for optimization because many smaller writes can be coalesced for larger transfers to disk drives with the use of cache. A write operation with cache is implemented in the following ways: -Write-back cache: Data is placed in cache and an acknowledgment is sent to the host immediately. Later, data from several writes are committed (de-staged) to the disk. Write response times are much faster because the write operations are isolated from the mechanical delays of the disk. However, uncommitted data is at risk of loss if cache failures occur.

  -Write-through cache: Data is placed in the cache and immediately written to the disk, and an acknowledgment is sent to the host. Because data is committed to disk as it arrives, the risks of data loss are low, but the write-response time is longer because of the disk operations. EMC E10-001 Student Resource Guide. Module 4: Intelligent Storage System

• Question 149:

  Refer to Exhibit:

  

  Which type of cloud deployment model is represented in the exhibit?

  A. Public
  B. Private
  C. Community
  D. Hybrid
  A. Public

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  Public Cloud

  

  In a public cloud model, the cloud infrastructure is provisioned for open use by the general public. It may be owned, managed, and operated by a business, academic, or government organization, or some combination of them. It exists on the

  premises of the cloud provider.

  Consumers use the cloud services offered by the providers via the Internet and pay metered usage charges or subscription fees. An advantage of the public cloud is its low capital cost with enormous scalability. However, for consumers,

  these benefits come with certain risks:

  No control over the resources in the cloud, the security of confidential data, network performance, and interoperability issues. Popular public cloud service providers are Amazon, Google, and Salesforce.com. Figure in the slide shows a public

  cloud that provides cloud services to organizations and individuals.

  EMC E10-001 Student Resource Guide. Module 13: Cloud Computing

• Question 150:

  Which component of a NAS head provides connectivity to the client network?

  A. NIC
  B. IP router
  C. FC HBA
  D. Storage protocol
  A. NIC