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• Traffic distribution for multicast on multiple distribution trees: Multicast traffic can be distributed along two multidestination trees. • More direct communication paths: Any topology is possible, so cabling two access or edge switches directly to each other creates a direct communication path, unlike what happens with Spanning Tree. • Simplicity of configuration: The configuration of FabricPath is very simple. Tuning may still be advised but by default the switches negotiate switch-ids allocation with a protocol called Dynamic Resource Allocation Protocol (DRAP). • Loop mitigation with TTL in the frame field: Layer 2 loops, as they are known of today in Spanning- Tree-Protocol-based Layer 2 networks, are mitigated by dropping frames that have been propagated across too many hops. The Layer 2 FabricPath frames include a Time to Live (TTL) field that is decremented at each hop. The value of the TTL field is 32. Explanation: Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-5000-series-switches/guide_c07- 690079.html (introduction, see the bullets) Question: 4 Which three concepts influenced the evolution of data centers? (Choose three.) A. Consolidation B. Expansion C. Automation D. Virtualization E. Commoditization F. Economics Answer: A, C, D Explanation: Data center transformation takes a step-by-step approach through integrated projects carried out over time. This differs from a traditional method of data center upgrades that takes a serial and siloed approach.[9] The typical projects within a data center transformation initiative include standardization/consolidation, virtualization, automation and security. Standardization/consolidation: The purpose of this project is to reduce the number of data centers a large organization may have. This project also helps to reduce the number of hardware, software platforms, tools and processes within a data center. Organizations replace aging data center equipment with newer ones that provide increased capacity and performance. Computing, networking and management platforms are standardized so they are easier to manage.[10] Virtualize: There is a trend to use IT virtualization technologies to replace or consolidate multiple data center equipment, such as servers. Virtualization helps to lower capital and operational expenses,[11] and reduce energy consumption.[12] Virtualization technologies are also used to create virtual desktops, which can then be hosted in data centers and rented out on a subscription basis.[13] Data released by investment bank Lazard Capital Markets reports that 48 percent of enterprise operations will be virtualized by 2012. Gartner views virtualization as a catalyst for modernization.[14] Automating: Data center automation involves automating tasks such as provisioning, configuration, patching, release management and compliance. As enterprises suffer from few skilled IT workers,[10] automating tasks make data centers run more efficiently. Securing: In modern data centers, the security of data on virtual systems is integrated with existing security of physical infrastructures.[15] The security of a modern data center must take into account
physical security, network security, and data and user security. Explanation: Reference: http://en.wikipedia.org/wiki/Data_center Question: 5 A network administrator has installed an N7K-F248-25XP module into an existing chassis. The module is powered on, but the interfaces are all in VDC0. What is the reason for this? A. The chassis needs an EPLD upgrade to support the new module type. B. The default VDC cannot support F2 modules. C. The interfaces must be allocated into a VDC for F2 modules only. D. The module has failed GOLD diagnostics, and the switch has isolated the ports to protect the integrity of the system. Question: 6 Answer: C Explanation: The F2-Series Cisco’s VDC feature helps enable the virtualization of a single physical device in one or more logical devices. Each of the provisioned logical devices is configured and managed as if it were a separate physical device Explanation: Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-seriesswitches/data_sheet_c78-685394.html Which two statements about SAN port channels configured on Cisco Nexus 5000 Series switches are true? (Choose two.) A. The bring up protocol automatically detects and overrides any misconfiguration. B. You can manually configure channel groups, or they can be automatically created. C. Changes in configuration to the SAN port channel interface must also be made to all members of the channel group. D. The port channel protocol uses the exchange fabric parameters command to communicate across peer ports in an ISL. E. The port channel protocol ensures that a set of ports is eligible to be part of the same SAN port channel. Answer: B, E Explanation: A user-configured channel group cannot be converted to an autocreated channel group. However, you can convert an autocreated channel group to a manual channel group. This task is irreversible. The channel group number does not change, but the member ports operate according to the properties of the manually configured channel group, and channel group autocreation is implicitly disabled for all the member ports. If you enable persistence, be sure to enable it at both ends of the SAN port channel.
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