EMC E20-555日常練習試験は2021年最新のに更新された345問あります
有効問題を試そう！E20-555試験で実際の試験問題と解答
EMC E20-555 認定試験の出題範囲：
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質問 29
Which Isilon OneFS job is responsible for examining the entire file system for inconsistencies and runs manually?
- A. FlexProtect
- B. AutoBalance
- C. MediaScan
- D. IntegrityScan
正解: D
解説:
Explanation
質問 30
Your customer uses an existing Isilon cluster consisting of five NL-Series nodes to source broadcast media files for playback and streaming.The customer reports that the playback pauses and stutters regularly. It has been confirmed that there are no network or playback system issues.
Which of the choices listed is the appropriate choice to address the playback issues?
- A. Upgrade OneFS to the latest version
- B. Enable SmartConnect Advanced
- C. Add three or more S-Series Nodes
- D. Enable Level 2 Caching
正解: C
質問 31
-- Exhibit --
We have been engaged by a research hospital to help upgrade their Isilon installation. They currently have
12 previous generation Isilon nodes with 200TB of capacity and run on a 1Gbps network. They currently have 6 Illumina Hi-Seq Sequencers and an HPC cluster to process data. They would like to expand Isilon to 2PB of active data and 1PB of archive data. They use a third party data and metadata management service (IRODs) to stage data for analysis. The Isilon cluster is mainly used for analysis work with the HPC cluster.
-- Exhibit --
Before making any changes, the customer would like a graphical presentation of their existing array performance to present to management.
What is the best tool to gather this information?
- A. netstat
- B. InsightIQ
- C. isi_netlogger
- D. tcpdump
正解: B
質問 32
A customer has two Isilon clusters in an Active-Passive setup. The customer has latency sensitive media editing workflows. Most of the media editing work occurs prior to broadcasting between 7:00-8:00, 11:00- 12:00, 17:00-18:00 and 19:00-20:00.
What should be recommended to minimize the risk of including latency to the client workflow?
- A. Retain the default job impact policies that would run the Job Engine jobs. Run SyncIQ policies during the given hours.
- B. Create and set a custom job impact policy that would exclude the running of the Job Engine jobs. Do not run SyncIQ policies during the given hours.
- C. Create and set a custom job impact policy that would exclude the running SyncIQ policies during the given hours.
- D. Retain the default job impact policies that would run the Job Engine jobs. Do not run SyncIQ policies during the given hours.
正解: B
質問 33
What are attributes of SFTP?
- A. Does not use FTP protocol
Uses port 990
Does not require client software - B. Uses FTP protocol
Uses port 990
Requires client software - C. Does not use FTP protocol
Uses port 22
Requires client software - D. Uses FTP protocol
Uses port 22
Requires client software
正解: B
質問 34
A potential customer is considering replacing a four year old, Linux-based NFS server with 40TB of usable capacity. The existing system supports home directories, an internal website, and a content repository for the customer's content management system. The customer is concerned about performance of any new solution because they expect to double workload in the content management system.
What tools can be used to collect performance data needed to size the new solution?
- A. Syslog and vmstat
- B. Perfmon and sysstat
- C. Isi statistics and Wireshark
- D. Iostat and nfsstat
正解: D
解説:
Explanation/Reference:
Reference: http://agiletesting.blogspot.com/2009/11/nfs-troubleshooting-with-iostat-and.html
質問 35
-- Exhibit --
A large manufacturing company is an existing Isilon customer with a cluster consisting of four NL400 nodes with 4TB drives. The cluster is using N+2:1 protection level and the file system shows that it is 60% utilized.
Home directories and file shares comprise 75% of the existing content and the remainder is inactive deep archive. The company has 1,000 employees using Windows and Mac clients participating in a single Active Directory (AD) forest.
During a meeting with the CIO and Director of IT you discuss the company's recent acquisition - an engineering firm that specializes in Computer Aided Design (CAD). The engineering firm has 400 UNIX workstations that produce technical drawings which are currently stored on another vendor's SAN solution. The all UNIX environment uses NIS for authentication and name resolution. They do not currently use DNS or LDAP. The engineering company has an old storage system that has been experiencing problems and the CIO would like you to migrate the data onto the Isilon cluster. The CIO would like to eliminate all tape and recover the data onto disk.
The CIO is concerned about security of the company's intellectual property, especially with the rapid adoption of mobile devices and external cloud content sharing services such as DropBox, Egnyte, and SugarSync. They would like to implement an alternative that provides external file sharing and mobile device synchronization while maintaining security control over the company's data.
The Director of IT reports that users are storing non-work related content on the Isilon cluster. They would like to limit the amount of capacity that each user can consume in their home directory and want to ensure you provide the capability to easily visualize which users are over their allotment.The company's Windows users currently leverage Windows Shadow Copy to recover files that have been accidentally deleted. The IT department wants to ensure that Mac and incoming UNIX clients have the same functionality.
The Director of IT also mentions that users are reporting slow response times when browsing their home directories and shared folders. They are concerned that Isilon cannot scale to support their combined requirements.
-- Exhibit --
Which Isilon license options are required to meet the customer's needs?
- A. SnapshotIQ
SmartQuotas
SmartLock
SyncIQ
InsightIQ - B. SnapshotIQ
SmartQuotas
Syncplicity EE
InsightIQ
SmartPools - C. SnapshotIQ
SmartQuotas
Syncplicity EE
SyncIQ
InsightIQ
SmartPools - D. SnapshotIQ
SmartConnect Advanced
SmartQuotas
SyncIQ
InsightIQ
SmartPools
正解: B
解説:
Explanation/Reference:
質問 36
You are designing a new Isilon system to store mobile device video clips. The files average
800MB in size and the application team tells you to plan for up to 15,000 new files per day.
The product manager for this new service wants enough capacity for the first year and reminds you that response time for storing and retrieving the files is important for customer satisfaction.
The files will be accessed frequently for the first 48 hours after creation, and then very infrequently after seven days. You plan to use N+2:1 protection, and will configure a SmartPools policy to move inactive files to an archive tier within the cluster.
Which configuration best fits the project requirements?
- A. 38 x X400 nodes with 4TB drives and SSD
- B. 4 x S200 nodes with SSD; 45 x NL400 nodes with 3TB drives
- C. 4 x X400 nodes with 1TB drives; 36 x NL400 nodes with 4TB drives
- D. 4 x X200 nodes with SSD; 36 x NL400 nodes with 4TB drives
正解: D
質問 37
A cost-conscious customer is exploring Isilon for their PACS archive. The workflow consists of one hundred cases a day, each including fifty 60MB image files. However, each image will have five-hundred
64kB metadata files associated with it. They currently have six years worth of archived data. They will need to migrate to the new solution and they need to plan for an additional three years of archive capacity.
Which solution would you recommend to fit their capacity needs?
- A. 24 NL-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity
- B. 18 NL-Series nodes with N+2:1 protection policy providing 2078 TiB of useable capacity
- C. 12 NL-Series nodes with N+2 protection policy providing 1300 TiB of useable capacity
- D. 24 X-Series nodes with N+3 protection policy providing 2597 TiB of useable capacity
正解: A
質問 38
You are designing a new Isilon cluster that requires backup to tape for all files in the Legal and Accounting shared folders. The customer has sized their IP network to support the application workload, but no additional bandwidth is available.
What should be recommended for the backup solution?
- A. Use Backup Accelerator nodes for 3-way NDMP
- B. Use an Avamar NDMP accelerator and dedicated 10Gb/s network interfaces
- C. Use Backup Accelerator nodes for 2-way NDMP
- D. Use SmartConnect Advanced and 10Gb/s network interfaces with LACP
正解: C
質問 39
Refer to the exhibit.
A customer calls you and asks if you could come by and interpret their InsightIQ data. You see that namespace reads are 63% of the work load.
What would you recommend to help this cluster's namespace performance?
- A. Turn off write cache
- B. Add S-Series nodes
- C. Add SSDs
- D. Add A-Series nodes
正解: C
質問 40
You are asked to size a cluster for a file sharing environment. nfsstat indicates that no more than 10% of the requests are namespace operations (e.g. GETADDR, SETADDR). There will be 10,000 active Linux users, connecting over NFS.
Which cluster configuration would you recommend?
- A. Ten X200 (27 TB) 48 GB RAM, 600 GB SSD, N+2:1
- B. Ten X400 (60 TB) 48 GB RAM, 2.4 TB SSD, N+2:1
- C. Eight X200 (36 TB) 24 GB RAM, no SSD, N+2:1
- D. Five X400 (120 TB) 96 GB RAM, 2.4 TB SSD, N+2
正解: A
質問 41
Which Isilon SmartLock version uses an NTP server to keep track of the set retention periods placed on a directory?
- A. Compliance
- B. Enterprise
- C. Standard No WORM
- D. Standard with WORM
正解: B
質問 42
The security team at a customer site has created a new requirement that in-flight replication traffic must be encrypted end-to-end. The customer is running OneFS 8.2.1 on their cluster.
What encryption protocol versions does SyncIQ support?
- A. TLS 1.2 and OpenSSL 1.0.2
- B. IPSec 2.1 and OpenSSL 1.0.2
- C. TLS 1.3 and OpenSSL 1.1.1
- D. x.509 13.37 and OpenSSL 0.9.8
正解: A
解説:
Reference:
https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/ h8224_replication_isilon_synciq_wp.pdf (56)
質問 43
The protection level of an Isilon Gen 6 cluster with eight nodes has been set to the default protection level. How many failures are tolerated without data loss?
- A. Two drives or one node
- B. Two drives in every node
- C. Three drives or three nodes
- D. Two drives and one node
正解: A
質問 44
When designing Isilon solutions, what issues should you pay special attention to?
- A. Workflow Document Solutions Document Application types Data strategy
- B. Solutions Document Balancing technical and business requirements Providing many options Practical vs. theoretical implementations
- C. Avoid being too enthusiastic over the technology Balancing technical and business requirements Provide Options Design to meet customer expectations
- D. Solutions Document Balancing technical and business requirements Downstream hand-off Design to meet customer expectations
正解: C
質問 45
You meet a customer for the first time. They explain that their current environment for NAS does not meet their needs. You want to make sure that Isilon is a good fit for their needs.
What would be a good prequalifying question to ask?
- A. How many users are in your Directory Services?
- B. What protocols are accessing your NAS?
- C. Is your datacenter ISO9001 compliant?
- D. What application are you using to create directories?
正解: B
質問 46
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