EMC EMC Certification E20-555 Questions & Answers

• Question 1:

  When installing nodes into a Dell EMC rack, which node type requires the use of a Titan-HD rack?

  A. H500

  B. F800

  C. A2000

  D. A200

  Correct Answer: C

  Reference: https://manualzz.com/doc/24184612/isilon-site-preparation-and-planning-guide

• Question 2:

  A customer has a cluster of 16 A200 nodes. Due to recent and forecasted growth, they have decided to expand the cluster by an additional 24 A200 nodes. How many neighborhoods will exist on the cluster when all nodes have joined the cluster?

  A. 1

  B. 2

  C. 4

  D. 6

  Correct Answer: A

  Neighborhoods split at 20 nodes. So it already had 2 neighborhoods. With the addition of 24 nodes, it will have 3 neighborhoods in total.

• Question 3:

  Allocation schema are being used.

  All the Linux clients are accessing Isilon exports using NFSv3 via the `NFS_Pool'. All the Windows clients are accessing Isilon shares using SMBv3 via the `SMB_Pool'.

  While deploying Isilon, the customer reserves the whole network subnet for Isilon. The customer is facing performance issues with a new workload that is accessing the Isilon via Kerberized NFSv4.

  What is recommended when creating a new IP pool for NFSv4 clients?

  A. Dynamic IP Allocation in the `System' access zone

  B. Dynamic IP Allocation in the `Data-Zone' access zone

  C. Static IP Allocation in the `System' access zone

  D. Static IP Allocation in the `Data-Zone' access zone

  Correct Answer: C

• Question 4:

  What is a consideration when designing access zones?

  A. Authentication providers are restricted to one specific zone

  B. UID/GID ranges should not overlap for providers in the same zone

  C. Access zones cannot overlap the same directories

  D. Share names must be unique between different access zones

  Correct Answer: B

  Reference: https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h17463-wp-dell-emc-isilon-design-and-considerations-for-smb.pdf (11)

• Question 5:

  How are clients, L1 cache, L2 cache, and disks interconnected?

  A. Clients connect to L1 Cache and write coalescer L1 cache is connected to L2 on the local node L2 cache connects to disks on all nodes via internal network

  B. Clients connect to L2 Cache and write coalescer L1 cache connects to disks on all nodes via internal network L2 cache is connected to L1 on the local node

  C. Clients connect to L2 Cache and write coalescer L1 cache connects to disk on its local node L2 cache is connected to L1 on all nodes via internal network

  D. Clients connect to L1 Cache and write coalescer L1 cache is connected to L2 on all nodes via internal network L2 cache connects to disks on its local node

  Correct Answer: A

• Question 6:

  What are attributes of SFTP?

  A. Uses FTP protocol Uses port 22 Requires client software

  B. Uses FTP protocol Uses port 990 Requires client software

  C. Does not use FTP protocol Uses port 990 Does not require client software

  D. Does not use FTP protocol Uses port 22 Requires client software

  Correct Answer: D

• Question 7:

  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 1.3 and OpenSSL 1.1.1

  B. IPSec 2.1 and OpenSSL 1.0.2

  C. TLS 1.2 and OpenSSL 1.0.2

  D. x.509 13.37 and OpenSSL 0.9.8

  Correct Answer: C

  Reference: https://www.dellemc.com/resources/en-us/asset/white-papers/products/storage/h8224_replication_isilon_synciq_wp.pdf (56)

• Question 8:

  Your customer has an Isilon Gen 6 cluster with eight H400 nodes. During an unexpected power outage some of the nodes go offline simultaneously.

  How many nodes need to remain up and communicating over the backend network to maintain a quorum in the cluster and still enable write access to the OneFS file system?

  A. 2

  B. 4

  C. 5

  D. 6

  Correct Answer: B

  Reference: https://www.dellemc.com/en-me/collaterals/unauth/technical-guides-support-information/products/storage/h10719-isilon-onefs-technical-overview-wp.pdf (23)

• Question 9:

  Which balancing option is provided by SmartConnect Basic?

  A. Round-Robin

  B. Throughput

  C. CPU usage

  D. Connection count

  Correct Answer: A

  Reference: http://doc.isilon.com/onefs/8.1.1/help/en-us/ifs_c_smartconnect_module.html

• Question 10:

  A customer has a cluster running with a single access zone and serves multiple internal departments. The clients access the cluster over both SMB and NFS protocols. A department user has been assigned the task of auditing SMB activity and enforcing appropriate quotas for certain users.

  How should the cluster administrator grant this access?

  A. Create a custom RBAC role

  B. Create a secondary root account credential

  C. Provide the AuditAdmin RBAC role

  D. Provide the SecurityAdmin RBAC role

  Correct Answer: A