Free 642-961 download :cisco Data Center Cisco Data Center Networking Infrastructure Solutions design exam
Certification Provider: cisco
Exam Name: 642-961 – Cisco Data Center Networking Infrastructure Solutions design
Related Certifications: Data Center
Language: English
Latest update:2010-05-01
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642-961 QUESTIONS ANSWERS WITH EXPLANATIONS
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642-961 CDCNID
Cisco Data Center Networking Infrastructure Design
Exam Number: 642-961
Associated Certifications: Data Center Switching Network Infrastructure
Duration: 75 minutes (60 questions)
Available Languages: English
Click Here to Register: Pearson VUE
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Exam Tutorial: Review type of exam questions
Exam Description Exam Topics Recommended Training Additional Resources
Exam Description
The 642-961 CDCNID Cisco Data Center Networking Infrastructure Design exam is the exam associated with the Data Center Design Specialist. Candidates can prepare for this exam by taking the CDCNID Cisco Data Center Networking Infrastructure Design v.1.0 course. This exam indicates a professional knowledge of designing solutions within the Cisco Data Center networking infrastructure.
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.
Describe the products and technologies used with Data Center Network Infrastructure
Describe the data center network architecture
Describe routing protocols used in a data center
Describe the use of Spanning Tree in a data center environment
Describe the Catalyst 6500 data center product set
Describe the Catalyst 4948
Describe Ethernet blade switches
Describe server fabric switches
Describe data center server models
Describe security components for data center infrastructure
Describe how storage protocols impact the design of an IP network
Describe the value proposition of the Cisco data center network architecture
Design the core layer of a data center infrastructure
Describe the data center core layer
Select appropriate platforms and modules in the data center core layer
Design a core layer to meet customer scalability, availability, and performance requirements
Design a core layer to meet customer security requirements
Design for traffic flows in the core
Design the aggregation layer of a data center infrastructure
Describe the data center aggregation layer
Select appropriate platforms and modules in the data center aggregation layer
Design an aggregation layer to meet customer scalability, availability, and performance requirements
Design for traffic flows in the aggregation layer
Design service module functionality into the aggregation layer
Design the access layer of a data center infrastructure
Describe the data center access layer
Select appropriate platforms and modules in the data center access layer
Design an access layer to meet customer scalability, availability, and performance requirements
Design an access layer to meet customer security requirements
Design for traffic flows in the access layer
Cisco 642-961
Cisco Data Center Networking Infrastructure Solutions Design
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1. Which statement best describes the data center core layer?
A. connects to the campus aggregation layer
B. provides a resilient Layer 2 routed fabric
C. is typically merged with the campus core layer
D. load balances traffic between the core and aggregation layers
Answer: D
2. Which type of network in an HPC environment most requires low latency?
A. MPI
B. access
C. private
D. storage
Answer: A
3. Which type of HPC application requires low latency?
A. financial analytics
B. finite element analysis
C. digital image rendering
D. seismic and geophysical modeling
Answer: B
4. A very large blade-server deployment has high throughput requirements for both data and storage networks. Which access layer option would you recommend?
A. blade server Ethernet switch with Cisco SFS 3000 Series Multifabric Switch
B. blade server InfiniBand switch with Cisco SFS 3000 Series Multifabric Switch
C. blade server Ethernet switch that is connected to Cisco Catalyst 4948 top-of-rack switch
D. blade server Ethernet switch that is connected to Cisco Catalyst 6500 Series end-of-rack switch
Answer: B
5. Refer to the exhibit. Where is Layer 2 adjacency required?
A. server-to-server only
B. access-to-server only
C. aggregation-to-access only
D. aggregation-to-access and access-to-server
Answer: B
6. Refer to the exhibit. What is a feature of this spanning-tree topology?
A. VLANs are not restricted to access-switch pairs.
B. Only one aggregation-to-access uplink is active at a given time.
C. If the link between access-switch pairs is broken, the return IP path may be broken.
D. Uplink failures on access layer switches will not break connectivity between servers and service modules in the aggregation layer.
Answer: C
7. How is FCIP traffic marked with DSCP values?
A. The Cisco MDS 9000 Series Multilayer Switch marks one DSCP value per FCIP tunnel.
B. The Cisco MDS 9000 Series Multilayer Switch marks two DSCP values per FCIP tunnel.
C. The aggregation layer Ethernet switch marks one DSCP value per FCIP tunnel.
D. The aggregation layer Ethernet switch marks two DSCP values per FCIP tunnel.
Answer: B
8. Which of the following attack types should be mitigated in the data center core layer?
A. port scans
B. IP spoofing
C. DDoS attacks
D. MAC address spoofing
Answer: C
9. Which statement is correct about the Cisco Catalyst 4948 Switch?
A. is nonblocking
B. performs only Layer 2 switching
C. has up to 48-Gbps wire-speed performance
D. balances lower cost with lower-performance access layer switching
Answer: A
10. Which statement describes an IDSM module operating in inline rather than promiscuous mode?
A. lower latency
B. higher latency
C. lower throughput
D. higher throughput
E. higher latency and lower throughput
F. lower latency and higher throughput
Answer: B
11. Refer to the exhibit. What do you need to configure to prevent spanning-tree loops from occurring between the two FWSMs?
A. FWSMs in transparent mode
B. ethertype ACLs to allow BPDUs
C. FWSMs in multiple-context mode
D. failover and state interfaces on the same VLAN
Answer: B
12. How many FWSM modules are needed to support 8 Gbps of throughput through an aggregation module?
A. one
B. two
C. four
D. eight
Answer: B
13. What advantage do 10-Gigabit Ethernet uplinks have over EtherChannels?
A. more reliable
B. higher bandwidth
C. faster convergence time
D. better load balancing of traffic
Answer: D
14. According to Cisco best practice, which service module should be placed in service switches within the aggregation layer?
A. NAM
B. CSM
C. IDSM
D. FWSM
Answer: B
15. What is the total bandwidth available to a Cisco Catalyst 6500 Series CEF720 line card?
A. 16 Gbps
B. 20 Gbps
C. 32 Gbps
D. 40 Gbps
E. 48 Gbps
Answer: D
16. Refer to the exhibit. Each letter (A-D) represents a model for placement of a default gateway. Which model allows the maximum number of application and security services?
A. model A
B. model B
C. model C
D. model D
Answer: C
17. Which three of the following service modules can be deployed in redundant pairs with active/active failover? (Choose three.)
A. ACE
B. CSM
C. NAM
D. IDSM
E. FWSM
F. SSLSM
Answer: ADE
18. What is the Cisco best-practice recommendation for the maximum number of HSRP instances per aggregation module?
A. 3
B. 30
C. 300
D. no recommended maximum
Answer: C
19. Which security technique would you use to protect servers from SYN-flooding DoS attacks?
A. uRPF
B. TCP intercept
C. TCP RPF check
D. drop and shutdown thresholds
Answer: B
20. Which data center network-architecture change is a result of the adoption of blade and 1-RU server technologies?
A. Layer 3 fault domains growing larger
B. Layer 2 fault domains growing larger
C. Layer 3 fault domains growing smaller
D. Layer 2 fault domains growing smaller
Answer: B