2013 Latest Cisco DESGN (640-864) Exam 16-20

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QUESTION 16
In terms of remote office design, which one of these statements is a characteristics only of a small remote office (up to 50 user), and not of medium or remote offices?
A. Link redundancy to access layer switches is not possible with an integrated design.
B. A collapsed access and distribution layer is required.
C. There are no loops in the network design.
D. Layer 3 services such as DHCP, firewall, and NAT are provided by enterprise campus.
Correct Answer: C
Section: Design Explanation

QUESTION 17
Which two statements about the data Center Aggregation layer are correct? (Choose two)
A. Layer 4 through layer 7 services are provided in that layer
B. STP should never be supported in that layer
C. That layer is the critical point for control and application services
D. Layer 2 connectivity is provided in that layer from the data center to the core
Correct Answer: AC
Section: Data Center Explanation
Data Center aggregation layer connects various network modules together. http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html

QUESTION 18
According to Cisco, which four improvements are the main benefits of the PPDIOO lifecycle approach to network design? (Choose four)
A. faster ROI
B. improved business agility
C. increased network availability
D. faster access to applications and services
E. lower total cost of network ownership
F. better implementation team engagement
Correct Answer: BCDE
Section: PPDIOO Explanation
The PPDIOO life cycle provides four main benefits:
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It improves business agility by establishing business requirements and technology strategies.
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It increases network availability by producing a sound network design and validating the network operation.
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It speeds access to applications and services by improving availability, reliability, security, scalability, and performance.
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It lowers the total cost of ownership by validating technology requirements and planning for infrastructure changes and resource requirements.
(Reference. Cisco CCDA Official Exam Certification Guide, 3rd Edition) described in the link below. http://www.ciscopress.com/articles/article.asp?p=1608131&seqNum=3

QUESTION 19
With respect to IPv6 addressing, from a design perspective, which of these statements is it important to keep in mind?
A. IPv6 addressing provides convenience of anycast addressing without any configuration requirements.
B. IPv6 does not use multicast addressing.
C. An IPv6 router will not forward packets from one link to other links if the packet has either a link- local source or a link-local destination address.
D. Dynamic address assignment requires DHCPv6.
Correct Answer: C
Section: IP addressing Explanation
Link local addresses are local to the LAN only, they are not communicated across LAN boundaries. Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/CampIPv6.html
QUESTION 20
When designing the infrastructure protection portion for the enterprise edge, which of these solutions would be the most appropriate solution to consider?
A. 802. IX
B. ACLs in the core layer
C. Cisco Security MARS
D. AAA Correct Answer: D

Section: Security Explanation

Security in the Enterprise Edge

Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 13

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