Tuesday, February 21, 2012

640-864 Q & A / Study Guide

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QUESTION 1
Which consideration is the most important for the network designer when considering IP routing?

A. convergence
B. scalability
C. on-demand routing
D. redistribution

Answer: B


QUESTION 2
You want to gather as much detail as possible during a network audit, to data time stamping
across a large number of interfaces, customized include according to interface, with a minimal
impact on the network devices themselves. Which tool would you use to meet these
requirements?

A. RMON
B. SNMFV3
C. NetFlow
D. Cisco Discovery Protocol

Answer: D


QUESTION 3
DataQuirk is a web-based medical transcription company for exotic-animal veterinarians. The
company recently added a third ISP for international business. They are organizing the enterprise
network into a fully operational Enterprise Edge.
To which two modules will the three ISPs be directly related? (Choose two)

A. PSTN
B. E- Commerce
C. WAN/MAN
D. Edge Distribution
E. Internet Connectivity
F. Remote Access VPN

Answer: B,E


QUESTION 4
Which two of these practices are considered to be best practices when designing the access layer
for the enterprise campus? (Choose two)

A. Implement all of the service (QoS, security, STP, and so on) in the access layer, offloading the
work from the distribution and core layers.
B. Always use a Spanning Tree Protocol; preferred is Rapid PVST+.
C. Use automatic VLAN pruning to prune unused VLANs from trunked interface to avoid broadcast
propagation.
D. Avoid wasted processing by disabling STP where loops are not possible.
E. Use VTP transparent mode to decrease the potential for operational error

Answer: B,C


QUESTION 5
With deterministic Wireless LAN Controller redundancy design, the different options available to
the designer have their own strengths. Which one of these statements is an example of such a
strength?

A. Dynamic load balancing, or salt-and-pepper access point design, avoids the potential impact of
oversubscription on aggregate network performance.
B. N+N redundancy configuration allows logically grouping access points on controllers to
minimize intercontroller roaming events.
C. N+N+1 redundancy configuration has the least impact to system management because all of
the controllers are collocated in an NOC or data center
D. N+1 redundancy configuration uses Layer 3 intercontroller roaming, maintaining traffic on the
same subnet for more efficiency.

Answer: B


QUESTION 6
Which of these statements is true concerning the data center access layer design?

A. The access layer in the data center is typically built at Layer 3, which allows for better shaping
of services across multiple servers.
B. With Layer 2 access, the default gateway for the servers can be configured at the access or
aggregation layer.
C. A dual-homing NIC requires a VLAN or trunk between the two access switches to support the
dual IP address on the two server links to two separate switches.
D. The access layer is normally not required, as dual homing is standard from the servers to the
aggregation layer.

Answer: B


QUESTION 7
Which one of these statements should the designer keep in mind when considering the advanced
routing features?

A. one-way router redistribution avoids the requirement for state or default routes.
B. Redistribution, summarization, and filtering are most often applied between the campus core
and enterprise edge.
C. Filtering only occurs on the routing domain boundary using redistribution.
D. Summarize routes at the core toward the distribution layer.
E. The hierarchical flexibility of IPv6 addressing avoids the requirements for routing traffic
reduction using aggregation.

Answer: B


QUESTION 8
Which two statements about designing the Data Center Access layer are correct? (Choose two)

A. Multiport NIC servers should each have their own IP address
B. Layer 3 connectivity should never be used in the access layer
C. Layer 2 connectivity is primarily implemented in the access layer
D. Multiport NIC servers should never be used in the access layer
E. Layer 2 clustering implementation requires servers to be Layer 2 adjacent

Answer: C,E


QUESTION 9
Which IPv6 feature enables routing to distribute connection requests to the nearest content
server?

A. Link-local
B. Site-local
C. Anycast
D. Multicast
E. Global aggregatable

Answer: C


QUESTION 10
Which one of these statements is true about addressing redundancy within the WAN
environment?

A. The reliability and speed of DSL allow for cost savings by not including redundant links.
B. CAMDM and dark fiber offer advanced redundancy features such as automatic backup and
repair mechanism to cope system faults.
C. An SLA is one way to eliminate the need for redundancy.
D. The failure of a single SONET/SDH link or network element does not lead to failure of the entire
network.

Answer: D


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