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NO.1 A security administrator is tasked with increasing the availability of the storage networks while
enhancing the performance of existing applications. Which of the following technologies should the
administrator implement to meet these goals? (Select TWO).
A. Multipath
B. LUN masking
C. Snapshots
D. vSAN
E. Deduplication
F. Dynamic disk pools
Answer: A,F
Explanation:
We can use dynamic disk pools (DDP) to increase availability and improve performance compared to
traditional RAID. Multipathing also improves availability by creating multiple paths to the storage (in
case one path fails) and it improves the performance by aggregating the performance of the multiple
paths.
DDP dynamically distributes all data, spare capacity, and protection information across a pool of
drives.
Effectively, DDP is a new type of RAID level, built on RAID 6. It uses an intelligent algorithm to define
where each chunk of data should reside. In traditional RAID, drives are organized into arrays, and
logical drives are written across stripes on the physical drives in the array. Hot spares contain no data
until a drive fails, leaving that spare capacity stranded and without a purpose. In the event of a drive
failure, the data is recreated on the hot spare, significantly impacting the performance of all drives in
the array during the rebuild process.
With DDP, each logical drive's data and spare capacity is distributed across all drives in the pool, so all
drives contribute to the aggregate 10 of the logical drive, and the spare capacity is available to all
logical drives. In the event of a physical drive failure, data is reconstructed throughout the disk pool.
Basically, the data that had previously resided on the failed drive is redistributed across all drives in
the pool. Recovery from a failed drive may be up to ten times faster than a rebuild in a traditional
RAID set, and the performance degradation is much less during the rebuild.
In computer storage, multipath 1/0 is a fault-tolerance and performance-enhancement technique
that defines more than one physical path between the CPU in a computer system and its massstorage
devices through the buses, controllers, switches, and bridge devices connecting them.
As an example, a SCSI hard disk drive may connect to two SCSI controllers on the same computer, or
a disk may connect to two Fibre Channel ports. Should one controller, port or switch fail, the
operating system can route the 1/0 through the remaining controller, port or switch transparently
and with no changes visible to the applications.
Incorrect Answers:
A: LUN masking is used to control which LUNs are visible to specific servers. It does not improve the
availability of the storage networks or the performance of existing applications.
B: A snapshot is a point in time image of the data on a SAN used for backup or recovery purposes. It
does not improve the availability of the storage networks or the performance of existing applications.
C: A vSAN is local storage on hypervisor servers combined together to create a "virtual SAN". A vSAN
does not improve the availability of the storage networks or the performance of existing applications.
F: Deduplication is the process of eliminating multiple copies of the same data to save storage space.
It does not improve the availability of the storage networks or the performance of existing
applications.
References:
http://blog.glcomp.com/2013/06/what-is-dynamic-disk-pooling.html
https://en.wikipedia.org/wiki/Multipath_l/0
NO.2 ABC Company must achieve compliance for PCI and SOX. Which of the following would BEST
allow the organization to achieve compliance and ensure security? (Select THREE).
A. Establish a company framework
B. Apply technical controls to meet compliance with the regulation
C. Establish a list of users that must work with each regulation
D. Compartmentalize the network
E. Establish a list of devices that must meet each regulation
F. Centralize management of all devices on the network
Answer: B,D,E
RC0-C02 Study
Explanation:
Payment card industry (PCI) compliance is adherence to a set of specific security standards that were
developed to protect card information during and after a financial transaction. PCI compliance is
required by all card brands.
There are six main requirements for PCI compliance. The vendor must:
Build and maintain a secure network
Protect cardholder data
Maintain a vulnerability management program
Implement strong access control measures
Regularly monitor and test networks
Maintain an information security policy
To achieve PCI and SOX compliance you should:
Establish a list of devices that must meet each regulation. List all the devices that contain the
sensitive data.
Compartmentalize the network. Compartmentalize the devices that contain the sensitive data to
form a security boundary.
Apply technical controls to meet compliance with the regulation. Secure the data as required.
Incorrect Answers:
A: It is not necessary to establish a list of users that must work with each regulation. All users should
be trained to manage sensitive data. However, PCI and SOX compliance is more about the security of
the data on the computers that contain the data.
C: Central management of all devices on the network makes device management easier for
administrators. However, it is not a requirement for PCI and SOX compliance.
E: A company framework is typically related to the structure of employee roles and departments. It is
not a requirement for PCI and SOX compliance.
References:
http://searchcompliance.techtarget.com/definition/PCl-compliance
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