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Cisco Storage Networking Solutions Design Specialist (CSSDS) : 642-355 Exam

642-355 CSSDS
Cisco Storage Networking Solutions Design Specialist

Exam Number: 642-355
Associated Certifications: Data Center Storage Networking
Duration: 60 minutes (50-60 questions)
Available Languages: English
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Exam Description Introduction Exam Topics Recommended Training Additional Resources
Exam Description Introduction
The 642-355 Cisco Storage Networking Solutions Design Specialist (CSSDS) exam is associated with the Data Center Storage Networking Specialization. Candidates can prepare for this exam by taking the Designing Cisco Storage Network (DCSN) course. This exam tests a candidate’s knowledge of selecting and integrating Cisco storage products to design a highly scalable, efficient, high performing storage networking solution based on converged architecture. Cisco Storage Networking Design Specialist professionals understand how to utilize and employ the features and benefits of the Cisco MDS 9000 Series Multilayer Directors and Switches, Cisco MDS 9509 Director Switch, Cisco 9216 Fabric Switch, and Cisco MDS 9120 products to create a high availability storage network design.

Exam Topics
The following information provides general guidelines for the content likely to be included on the exam. However, other related topics may also appear on any specific delivery of the exam. In order to better reflect the contents of the exam and for clarity purposes the guidelines below may change at any time without notice.

Perform a needs analysis that identifies the appropriate Storage Networking topology, protocols, and transport to meet customer’s requirements
Describe the benefits of implementing a Cisco collapsed core SAN network design.
Describe the evolution of SAN topology design.
Evaluate over-subscription ratio for a given design.
Determine if iSCSI is appropriate for design implementation.
Determine SAN Extension requirements for customer solution.
Evaluate deployment opportunities for MDS family.
Evaluate the customer’s applications requirements.
Evaluate the customer’s business continuance requirements.
Evaluate the customer’s backup/replication requirements.
Evaluate the customer’s high availability requirements.
Evaluate the customer’s SAN utilization and propose consolidation options.
Evaluate the customer’s Storage Virtualization implementation strategy.
Evaluate the customer’s Security requirements.

Identify the interoperability requirements of a customer’s SAN
Identify and document existing customer infrastructure.
Identify considerations that should be addressed when designing a heterogeneous fabric.

Design a solution that addresses a customer’s SAN requirements
Describe value added MDS features that address identified customer needs and requirements.
Determine the appropriate topology for a given implementation.
Select the appropriate protocols for design implementation.
Select appropriate collapsed core design given a set of customer requirements.
Select the appropriate design option given a set of customer requirements including applications such as database, mail-server, backup and replication.
Identify characteristics of customer’s host operating systems that could impact their SAN design.
Develop a capacity plan for implementing a Cisco SAN solution.
Identify SAN Extension topology, devices, and features appropriate for a SAN solution.
Propose alternative protocols, topologies, devices, and features that would improve customer solution (cost, performance, etc).
Design an appropriate Cisco management infrastructure.
Determine hardware configurations, power requirements, and environmental considerations to support SAN fabric design.
Design a backup and recovery solution.

Design appropriate IP configurations for a SAN solution
Describe the importance of using appropriate MTU size.
Determine requirements for IP routing.
Design appropriate VLANs for storage solutions.
Determine ACL requirements for storage solutions.

Exam Number/Code: 642-355
Exam Name:Cisco Storage Networking Solutions Design Specialist (CSSDS)

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QUESTION 16:
Exhibit:
Your work as network administrator at PassGuide .com. You study the exhibit carefully.
you are designed a new SAN. The existing SAN uses eight 32-port 2-Gbps Fibre Channel
switches. Two of the switches are deployed as core switches and the remaining six
switches are deployed as edge switches. Each edge switch has two ISLs to each of the
two core switches. The disk array has twelve 2-GBPS channel ports. Each of the 84
servers has a dual-port 1-GBPS Fibre Channel HBA.
Which Cisco MDS 9000 configuration would improve performance?
A. Two Cisco MDS 9216 switches, with two 48-port Fibre Channel Line cards in each
switch
B. Two Cisco MDS 9506 switches, with two 32-port Fibre Channel Line cards in each
switch
C. Two Cisco MDS 9513 switches with two 48-port Fibre Channel line cards in each
switch
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D. Two Cisco MDS 9506 switches, with one 16-port Fibre Channel card and two 48-port
Fibre Channel line cards in each switch
Answer: D
QUESTION 17:
Which technology should be used to provide transparent low latency FC transport across
a metropolitan area?
A. FCIP
B. iSCSI
C. DWDM
D. iFCP
Answer: C
QUESTION 18:
What is the best mechanism to use to isolate backup traffic from other mission-critical
traffic?
A. Zones
B. VSANs
C. QoS
D. IVR
Answer: B
QUESTION 19:
PassGuide .com has deployed a number of Cisco MDS 9509 Multilayer Directors in its
data center. Some of the directors were deployed with a pair of 4000W AC power
supplies and some were deployed with a pair of 2500W AC power supplies, depending
on their locations within the data center. The customer has a pool of spare 4000W power
supplies. The power supplies to some of the directors have been configured in combined
mode in order to support line card configuration/
One of the 2500W power supplies to an MDS 9509 configured in combined mode fails.
The administrator has no additional 2500W power supplies as spare. The administrator
replaces the failed 2500W power supply with a 4000W power supply.
What will be the combined-mode power capacity of the MDS 9509 running on 220V AC
power?
A. 5000
B. 2500
C. 1300
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D. 6500
Answer: A
QUESTION 20:
Exhibit:
Your work as network administrator at PassGuide .com. You study the exhibit carefully.
PassGuide .com has an existing SAN with eight edge switches and two core switches. In
your detailed assessment, which metric will help you convince the customer to consider
an alternative more highly available topology?
A. Cost of edge switch devices
B. SFP characteristics
C. Total Versus usable ports for end devices
D. Total Port count
Answer: C