EMC E10-001 Online Practice Questions and Exam Preparation

EMC E10-001 Online Questions & Answers

• Question 171:

  A state government has a number of independent agencies. They have common requirements and function under the same policies and guidelines. Each agency has a limited budget and requires a cloud solution for their operations.

  Which cloud service model will enable the agencies to deploy a shared cloud infrastructure and lower their individual costs?

  A. Community cloud
  B. Externally-hosted private cloud
  C. Hybrid cloud
  D. On-premise private cloud
  A. Community cloud

• Question 172:

  What is an element of a NAS head?

  A. Control station
  B. Storage controller
  C. Data accepted in real time
  D. Optimized operating system
  D. Optimized operating system

  ---

  Components of NAS A NAS device has two key components: NAS head and storage. In some NAS implementations, the storage could be external to the NAS device and shared with other hosts. The NAS head includes the following components: CPU and memory One or more network interface cards (NICs), which provide connectivity to the client network. Examples of network protocols supported by NIC include Gigabit Ethernet, Fast Ethernet, ATM, and Fiber Distributed Data Interface (FDDI) An optimized operating system for managing the NAS functionality. It translates file level requests into block-storage requests and further converts the data supplied at the block level to file data NFS, CIFS, and other protocols for file sharing Industry-standard storage protocols and ports to connect and manage physical disk resources The NAS environment includes clients accessing a NAS device over an IP network using file sharing protocols.

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

• Question 173:

  Which host component eliminates the need to deploy separate adapters for FC and Ethernet communications?

  A. Converged network adapter
  B. TCP Offload Engine NIC
  C. FCIP bridging adapter
  D. iSCSI host bus adapter
  A. Converged network adapter

  ---

  Converged Network Adaptor (CNA) A CNA provides the functionality of both a standard NIC and an FC HBA in a single adapter and consolidates both types of traffic. CNA eliminates the need to deploy separate adapters and cables for FC and Ethernet communications, thereby reducing the required number of server slots and switch ports. CNA offloads the FCoE protocol processing task from the server, thereby freeing the server CPU resources for application processing. A CNA contains separate modules for 10 Gigabit Ethernet, Fibre Channel, and FCoE Application Specific Integrated Circuits (ASICs). The FCoE ASIC encapsulate FC frames into Ethernet frames. One end of this ASIC is connected to 10GbE and FC ASICs for server connectivity, while the other end provides a 10GbE interface to connect to an FCoE switch.

  

  EMC E10-001 Student Resource Guide. Module 6: IP SAN and FCoE

• Question 174:

  Refer to Exhibit:

  

  Which type of replication is represented in the exhibit?

  A. Cascade/multihop, synchronous + disk buffered
  B. Cascade/multihop, synchronous + asynchronous
  C. Triangle/multitarget, synchronous + disk buffered
  D. Triangle/multitarget, synchronous + differential resync
  A. Cascade/multihop, synchronous + disk buffered

  ---

  Three-site Replication: Cascade/Multiphop (Synchronous + Disk Buffered) In the cascade/multihop three- site replication, data flows from the source to the intermediate storage array, known as a bunker, in the first hop, and then, from a bunker to a storage array at a remote site in the second hop. Replication can be performed in two ways, synchronous+ disk- buffered or synchronous + asynchronous.

  Synchronous + Disk Buffered: This method employs a combination of local and remote replication technologies. Synchronous replication occurs between the source and the bunker; a consistent PIT local replica is created at the bunker. Data is transmitted from the local replica at the bunker to the remote replica at the remote site. Optionally, a local replica can be created at the remote site after data is received from the bunker. In this method, a minimum of 4 storage volumes are required (including the source) to replicate one storage device. RPO at the remote site is usually in the order of hours for this implementation. EMC E10-001 Student Resource Guide. Module 12: Remote Replication

• Question 175:

  What is an example of an availability management task?

  A. Configuring LUN masking
  B. Enforcing capacity quotas for users
  C. Installing multipathing software
  D. Auditing of event logs
  C. Installing multipathing software

  ---

  Availability Management A critical task in availability management is establishing a proper guideline based on defined service levels to ensure availability. Availability management involves all availability-related issues for components or services to ensure that service levels are met. A key activity in availability management is to provision redundancy at all levels, including components, data, or even site levels. For example, when a server is deployed to support a critical business function, it requires high availability. This is generally accomplished by deploying two or more HBAs, multipathing software, and server clustering. The server must be connected to the storage array using at least two independent fabrics and switches that have built-in redundancy. Provision RAID-protected LUNs to the server using at least two front-end ports.

  In addition, the storage arrays should have built-in redundancy for various components and should support local and remote replication.

  EMC E10-001 Student Resource Guide. Module 14: Securing the Storage Infrastructure

• Question 176:

  Refer to the exhibit.

  

  Which type of Fibre Channel (FC) ports do "X" and "Y" represent in the exhibit?

  A. X is an F_Port and Y is an N_Port
  B. X is an N_Port and Y is an E_Port
  C. X is an E_Port and Y is an F_Port
  D. X is an N_Port and Y is an F_Port
  A. X is an F_Port and Y is an N_Port

• Question 177:

  An organization backs up their data to a tape library. What is a possible impact of the "shoe shining" effect?

  A. Causes degradation of the tape media
  B. Deletes the data stored on the tapes
  C. Increases the network bandwidth requirement
  D. Reduces the amount of data to be backed up
  A. Causes degradation of the tape media

• Question 178:

  What describes a full mesh topology?

  A. All switches are directly connected to each other
  B. Consists of core and edge switch tiers
  C. Requires four switches
  D. Requires two ISL hops for host to storage traffic
  A. All switches are directly connected to each other

  ---

  Mesh Topology

  

  A mesh topology may be one of the two types: full mesh or partial mesh. In a full mesh, every switch is connected to every other switch in the topology . A full mesh topology may be appropriate when the number of switches involved is small. A typical deployment would involve up to four switches or directors, with each of them servicing highly localized host-tostorage traffic. In a full mesh topology, a maximum of one ISL or hop is required for host-tostorage traffic. However, with the increase in the number of switches, the number of switch ports used for ISL also increases. This reduces the available switch ports for node connectivity.

  In a partial mesh topology, several hops or ISLs may be required for the traffic to reach its destination. Partial mesh offers more scalability than full mesh topology. However, without proper placement of host and storage devices, traffic management in a partial mesh fabric might be complicated and ISLs could become overloaded due to excessive traffic aggregation. EMC E10-001 Student Resource Guide. Module

  5: Fibre Channel Storage Area Network (FC SAN)

• Question 179:

  The queued writes on the source side exceed the size of the dedicated log file. Which remote replication technology requires a full resynchronization between source and target in this situation?

  A. Array based synchronous remote replication
  B. Disk buffered consistent remote replication
  C. LVM based remote replication
  D. Synchronous plus extended distance consistent remote replication
  C. LVM based remote replication

• Question 180:

  What does a block map contain in a file system snapshot?

  A. Address from which data is to be read when accessing the snapshot
  B. Original data when a write is issued to the target for the first time
  C. Blocks that have changed since the creation of the snapshot
  D. Blocks that have been modified in either the source or the target
  A. Address from which data is to be read when accessing the snapshot

  ---

  Host-based Replication: File System Snapshot

  

  File system (FS) snapshot is a pointer-based replica that requires a fraction of the space used by the production FS. It uses the Copy on First Write (CoFW) principle to create snapshots.

  When a snapshot is created, a bitmap and blockmap are created in the metadata of the Snap FS. The bitmap is used to keep track of blocks that are changed on the production FS after the snap creation. The blockmap is used to indicate the exact address from which the data is to be read when the data is accessed from the Snap FS . Immediately after the creation of the FS Snapshot, all reads from the snapshot are actually served by reading the production FS. In a CoFW mechanism, if a write I/O is issued to the production FS for the first time after the creation of a snapshot, the I/O is held and the original data of production FS corresponding to that location is moved to the Snap FS. Then, the write is allowed to the production FS. The bitmap and blockmap are updated accordingly. Subsequent writes to the same location will not initiate the CoFW activity. To read from the Snap FS, the bitmap is consulted. If the bit is 0, then the read is directed to the production FS. If the bit is 1, then the block address is obtained from the blockmap and the data is read from that address on the snap FS. Read requests from the production FS work as normal. EMC E10-001 Student Resource Guide. Module 11: Local Replication