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Code d'Examen: E20-385
Nom d'Examen: EMC (E20-385 Data Domain Specialist Exam for Implementation Engineers)
Questions et réponses: 116 Q&As

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NO.1 You have implemented an EMC Data Domain system with directory replication. After
replication has occurred, the customer notices that the space utilization on the source and
destination systems is different. How can this be explained?
A.Difference in global compression
B. Difference in the encryption algorithm
C. CIFS/NFS is mixed on the same directory
D. Destination directory may be corrupted
Answer: A

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NO.2 When connecting EMC Data Domain expansion shelves, what should be done to avoid cable
stress at the solder joints of the connector?
A. Keep the ambient temperature at an acceptable level
B. Use screw lock assemblies
C. Leave enough cable to allow for free air flow
D. Secure the cable to the rack door
Answer: B

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NO.3 You are implementing an EMC Data Domain system at a location that is not staffed.
However, the customer has network connectivity to the site from the main data center.
In the event of a system crash, what can be configured to allow the customer the ability
to cycle power?
A. Serial over LAN
B. SNMP
C. IPMI
D. Replication
Answer: C

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NO.4 What is a component of the EMC Data Domain Data Invulnerability Architecture that protects
against data loss?
A.File system recoverability
B. Summary vector identification
C. System sanitization
D.Segment locality processing
Answer: A

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NO.5 An organization currently writes backups to an EMC Data Domain system and then creates
encrypted copies of their backups on tapes. These tapes are then shipped to a third-party offsite
vault.They are now planning to deploy a second Data Domain system in a hosted disaster recovery
site as a replication target. This will replace the use of the offsite tapes. The two sites are connected
through an encrypted WAN link. Where should encryption be applied on the Data Domain systems
to ensure a similar level of data security as their current process?
A.Use encryption of data in flight to the hosted disaster recovery site
B.Enable encryption of data at rest at the disaster recovery site
C.Enable encryption of data at rest at the source site
D. WAN link between the sites is already encrypted
Answer: B

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NO.6 Which cabling path is used to connect an existing EMC Data Doman ES20 expansion shelf to a
new ES20 shelf?
A. Existing Expansion Shelf EXP'N port => New Expansion Shelf HOST port
B. Existing Expansion Shelf HOST port => New Expansion Shelf EXP'N port
C. Existing Expansion Shelf HOST port => New Expansion Shelf HOST port
D. Existing Expansion Shelf EXP'N port => New Expansion Shelf EXP'N port
Answer: A

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NO.7 Which method of deduplication yields better deduplication results for multiple data types?
A. Variable segment size deduplication due to its ability to add data to a variable segment and move
the data stream.
B. Fixed segment size deduplication due to its ability to add data to a fixed segment without having
to move the data stream.
C. Fixed segment size deduplication due to its ability to add data to a fixed segment and move the
data stream.
D. Variable segment size deduplication due to its ability to add data to a variable segment without
having to move the data stream.
Answer: D,A

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NO.8 A customer is interested in deploying DD Boost for their current EMC Data Domain system.
They are aware of Distributed Segment Processing (DSP) and want to know the data flow when they
enable DSP . What describes the data flow from the backup host to the Data Domain system?
A. Segmenting, fingerprinting, and compression occur on the backup host. Fingerprint filtering and
writes occur on the Data Domain.
B. Segmenting, fingerprinting, and fingerprint filtering occur on the backup host. Compression and
writes occur on the Data Domain.
C. Fingerprinting, compression, and fingerprint filtering occur on the backup host. Segmenting and
writes occur on the Data Domain.
D. Segmenting, fingerprinting, fingerprint filtering, and compression occur on the backup host.
Writes occur on the Data Domain.
Answer: A

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NO.9 What is indicated by a flashing green SAS state LED on an EMC Data Domain ES20 SAS
controller?
A.Connection problem
B.Connection established
C. RAID reconstruction in progress
D.Connection in process
Answer: D

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NO.10 An organization currently writes backups to an EMC Data Domain system and then creates
encrypted copies of their backups on tapes. These tapes are then shipped to a third-party offsite
vault.
They are now planning to deploy a second Data Domain system to a secure data center at their
corporate headquarters as a replication target to replace the use of the offsite tapes. The two sites
are connected through the Internet. Where should encryption be applied on the Data Domain
systems to ensure a similar level of data security as achieved by their current process?
A. Encrypt the replication context
B. Encrypt the data at rest
C. Encrypt the data at rest and the replication context
D. Encryption is not required
Answer: A

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