EMC E20-020 Online Practice Questions and Exam Preparation

EMC E20-020 Online Questions & Answers

• Question 51:

  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
  A. Generic Network Virtualization Encapsulation

  ---

  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. References: https://www.sdxcentral.com/articles/news/intel-supports-geneve-unify-vxlan- nvgre/2014/09/

• Question 52:

  Which networking technology is required for application HA in contrast to host HA or operating system HA?

  A. Multipath routing
  B. Shared storage
  C. Load balancing
  D. VLANs
  B. Shared storage

  ---

  Symantec ApplicationHA could perhaps be described as the pairing of Veritas Cluster Server with VMware HA. Vertias Cluster server has been a leading clustering solution for many years with its excellent cross-platform support. Veritas Cluster Server uses a shared storage model to provide high availability References: http://www.blueshiftblog.com/?p=443

• Question 53:

  What is a benefit of a service catalog?

  A. Handles every IT request simultaneously
  B. Allows users to customize tenant roles
  C. Services do not have to meet the standards set by the business
  D. Enables the application of quotas on resources to control cost
  D. Enables the application of quotas on resources to control cost

  ---

  Explanation: Section: (none)

• Question 54:

  Which additional considerations must a cloud monitoring system address compared to a traditional monitoring system?

  A. Tenant isolation, orchestration, and elastic workloads
  B. Orchestration, elastic workloads, and Data at Rest security
  C. Elastic workloads, Data at Rest security, and tenant isolation
  D. Data at Rest security, tenant isolation, and orchestration
  C. Elastic workloads, Data at Rest security, and tenant isolation

  ---

  * Encrypt data-at-rest

  Encryption is your front-line defense for defending data-at-rest. It limits access to those with the right keys ?locking out anyone who doesn't have them.

• Question 55:

  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
  B. Fault domain detection and isolation to ensure data availability

  ---

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

• Question 56:

  You are creating a cloud infrastructure design for an organization. You learn that, for compliance reasons, the organization needs to maintain a separate set of infrastructures for certain deployed services. Which part of the design will be impacted by this requirement?

  A. Number of service catalogs
  B. Number of compute pools
  C. Service catalog sizing
  D. Over-commitment ratio
  B. Number of compute pools

• Question 57:

  Which infrastructure does VCE Vblock represent?

  A. Brownfield
  B. Traditional
  C. Hyper-converged
  D. Converged
  D. Converged

  ---

  Vblock is the brand name VCE uses for racks containing the components of its data center products. Prepackaging, called converged infrastructure, allows customers to select preconfigured and integrated solutions, with predictable units of power, weight, cooling, and geometry for data center planning purposes. References: https://en.wikipedia.org/wiki/Vblock

• Question 58:

  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
  B. Cloud services and administration

• Question 59:

  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
  D. HA licenses for hypervisors

• Question 60:

  An organization is currently using a private cloud to host gaming applications. The private cloud is located in the organization's data center. These applications have very little static data and no requirements for securing data.

  Authentication is handled through an external resource.

  During holiday and vacation seasons, application usage increases significantly and more resources are required. However, the increase only occurs about 10% of the year and the organization wants to maintain performance.

  What can be done to meet this requirement?

  A. Deploy global load balances
  B. Create QoS policies during peak usage
  C. Move to a hybrid cloud model
  D. Implement a CDN solution
  C. Move to a hybrid cloud model

  ---

  Hybrid cloud is a cloud computing environment which uses a mix of on-premises, private cloud and third-party, public cloud services with orchestration between the two platforms. By allowing workloads to move between private and public clouds as computing needs and costs change, hybrid cloud gives businesses greater flexibility and more data deployment options. Incorrect: Not D: A content delivery network (CDN) is a system of distributed servers (network) that deliver webpages and other Web content to a user based on the geographic locations of the user, the origin of the webpage and a content delivery server. References: http://searchcloudcomputing.techtarget.com/definition/hybrid-cloud