VMware Certified Professional 5 – Data Center Virtualization for Instructors
Question No: 101 – (Topic 3)
What number of IOPS should be used with Storage I/O Control to limit disk throughput to roughly 10 MBps if the guest application writes 64KB blocks?
Reference: http://www.vmware.com/files/pdf/techpaper/view_storage_considerations.pdf (page 3 and 4)
Question No: 102 – (Topic 3)
What are two methods of maximizing VMFS performance for virtual machines across all the hosts in a cluster? (Choose two.)
Use disk shares to prioritize virtual machine disk I/O
Enable Storage I/O control
Enable Storage DRS with I/O load balancing
Enable Host Cache using local SSD drives
Answer: B,C Explanation:
To maximize VMFS performance of virtual machines, you can enable Storage I/O control and storage DRS with I/O load balancing.
Question No: 103 – (Topic 3)
Click the Exhibit button.
For the selected item, what two properties could the storage administrator use to create a zone? (Choose two.)
Answer: A,D Explanation:
Fibre channel adapter and target needs to be used to create a zone.
Question No: 104 – (Topic 3)
A new LUN has been provisioned to all hosts in a vSphere 5.x cluster. On one host a new VMFS datastore has been created.
How will the new datastore be discovered by the other ESXi 5.x hosts?
A rescan of all host bus adapters is periodically performed by ESXi hosts to detect new VMFS datastores.
New VMFS volumes are automatically added to members of a cluster by vCenter 5.
A manual refresh is required on each ESXi 5.x hosts to discover new VMFS datastores.
A refresh of all host bus adapters is periodically performed by ESXi hosts to detect new VMFS datastores.
Answer: C Explanation:
You need to manually refresh every ESXi 5.x host to get it to discover newly added VMFS datastores.
Question No: 105 – (Topic 3)
The storage administrator has recommended testing the performance benefits of jumbo frames and enabled jumbo frames on the storage array. The VMware administrator has enabled jumbo frames on the VMkernel port used for the software iSCSI initiator.
What other two components must be modified to enable jumbo frames support for the software iSCSI initiator? (Choose two.)
The physical switch
The port group
The software initiator
The virtual switch
Reference: http://www.interworks.com/blogs/kculwell/2010/01/29/enabling-jumbo-frames- vmware-esx-4
Question No: 106 – (Topic 3)
What is the default VFAT scratch partition size for ESXi 5.x when installed on a USB drive?
Reference: http://blogs.vmware.com/vsphere/2011/09/booting-esxi-off-usbsd.html (see bulleted # 3)
Question No: 107 – (Topic 3)
What is one requirement when adding an extent to a VMFS datastore?
A new unused NFS mount
An RDM with sufficient space available
An unused iSCSI or FCP LUN
Free space on the LUN holding the VMFS datastore
Question No: 108 – (Topic 3)
How can you verify that vStorage APIs for Array Integration (VAAI) functionality is enabled for a storage array in a vSphere 5.x implementation?
VAAI will be reported on the Hard Disk properties page for any VMDK stored on a compliant array
Hardware Acceleration will be reported on the Hard Disk properties page for any VMDK stored on a compliant array
Supported will be listed in the VAAI column for any datastore created on a compliant array
Supported will be listed in the Hardware Acceleration column for any datastore created on a compliant array
Question No: 109 – (Topic 3)
When designing a storage infrastructure to support ESXi 5.x hosts what limit will be reached first?
Maximum number of NFS datastores
Maximum number of iSCSI LUNs
Maximum number of paths to an iSCSI RDM
Maximum number of iSCSI paths on a host
Answer: C Explanation:
When the storage infrastructure is designed to support ESXi 5 hosts, the number of path to an iSCSI RDM are reaches its limit first.
Question No: 110 – (Topic 3)
Which is the most secure method of connecting to an iSCSI storage array using an independent hardware iSCSI adapter?
Answer: A Explanation:
If you’re thinking two direction CHAP authentication would be the most secure, you would probably be right EXCEPT the question was about an independent hardware iSCSI adapter. As per the VMware pubs page: “Independent hardware iSCSI supports CHAP only at the initiator level.” which means One-way CHAP.
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