2013 Latest Cisco DESGN (640-864) Exam 26-30

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2013 Latest Cisco Designing for Cisco Internetwork Solutions Exam DESGN v2.1 640-864 EXAM download 26-30

QUESTION 26
When selecting which hardware switches to use throughout an enterprise campus switched network, which consideration is not relevant?
A. whether data link layer switching based the MAC address is required
B. the number of shared media segments
C. which infrastructure service capabilities are required
D. whether to support Layer 3 services at the network edge.
Correct Answer: B
Section: Design Explanation
Shared media are not used in modern networks; all links are operating full-duplex. Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html

QUESTION 27
Layer 2 switching is exclusively used in which Enterprise Campus Module layer?
A. Server Farm
B. Campus Core
C. Building Access
D. Building Distribution
E. Internet Connectivity
Correct Answer: C
Section: Architecture Explanation
Access layer provides network connectivity to end users which is layer 2 in nature. Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html#wp708780
QUESTION 28
Which one of these statements describes why, from a design perspective, a managed VPN approach for enterprise teleworkers is a most effective?
A. A managed VPN solution uses a cost effective, on-demand VPN tunnel back to the enterprise
B. This solution supports all teleworkers who do not require voce or video
C. This architecture provides centralized management where the enterprise can apply security policies and push configurations.
D. It provides complete flexibility for remote access through a wireless hotspot or a guest network at a host, in addition to a home office.
Correct Answer: C
Section: Design Explanation
Here is the answer from the Cisco Certification guide.
Enterprise Teleworker Design
Enterprise teleworkers need to be differentiated from the occasional remote worker. The full-time enterprise teleworker has more extensive application access and requirements than the occasional remote worker. Occasionally, remote users connect to the corporate network at a hotspot, but generally they do not have the same application demands of an enterprise teleworker. Generally, enterprise teleworkers connect to a local ISP through a cable or DSL connection in their residence. The Cisco Virtual Office Solution for the Enterprise Teleworker is implemented using the Cisco 800 series ISRs. Each ISR has integrated switch ports that then connect to the users broadband connection. The solution uses a permanent always-on IPsec VPN tunnel back to the corporate network. This architecture provides for centralized IT security management, corporate-pushed security policies, and integrated identity services. In addition, this solution supports the enterprise teleworker needs through advanced applications such as voice and video. For example, the enterprise teleworker can take advantage of toll bypass, voicemail, and advanced IP phone features not available in the PSTN.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 7

QUESTION 29
Which one of these statements is true when considering the design of voice and video services for the enterprise campus network?
A. Access layer switches should support 802.1Q trunking and 802.1p for Layer 2 CoS packet marking on Layer 2 ports with IP phones connected.
B. Combining voice and data and a single VLAN simplifies QoS trust boundaries, VLAN access control, and ease of management.
C. Data devices will also require access to priority queues via packet tagging.
D. Fixed network delays (serialization, propagation, and so on) are generally unpredictable and more difficult to calculate than variable network delays.
Correct Answer: A
Section: Voice Video Explanation
802.1Q & 802.1P are required for Vlan tagging & prioritizing voice frames.
Link:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_sec/configuration/ guide/swvoip.html

QUESTION 30
Refer to the exhibit.
Which two statements correctly identify the layers of the Enterprise Campus module? (Choose two)
A. A is the Data Center Module and C is the Campus Core layer
B. A is the Data Center Module and D is the Building Access layer
C. B is the Campus Core layer and C is the Building Distribution layer
D. B is the Building Distribution layer and C is the Campus Core layer
E. A is the Internet Connectivity layer and B is the Campus Core layer
F. B is the Building Distribution layer and D is the Building Access layer
Correct Answer: BC
Section: Architecture Explanation
Module characteristics show to which category the blocks belong to.
Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/Campus/campover.html#wp708780

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