Cisco 642-874

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Cisco Designing Cisco Network Service Architectures Sample Questions:

1. Which three major points are important for network virtualization to separate logical networks on a shared physical infrastructure? (Choose three.)

A) VPNs
B) management plane
C) data plane
D) VLANs
E) control plane
F) VSANs

2. Which of the following should the Enterprise Campus network designer consider with respect to Video traffic?

A) Streaming video applications are sensitive to delay while interactive video applications, using TCP as the underlying transport, are fairly tolerant of delay and jitter
B) Avoid bandwidth starvation due to video traffic by preventing and controlling the wide adoption of unsupported video applications
C) While it is expected that the sum of all forms of video traffic will grow to over 90% by 2013, the Enterprise will be spared this rapid adoption of video by consumers through a traditional top-down approach
D) Which traffic model is in use, the flow direction for the traffic streams between the application components, and the traffic trends for each video application

3. The network designer needs to consider the number of multicast applications and sources in the network to provide the most robust network possible. Which of the following is a consideration the designer must also address?

A) With SSM source or receiver attacks are not possible
B) The IGPs should utilize authentication to avoid being the most vulnerable component
C) Limit the rate of Register messages to the RP to prevent specific hosts from being attacked on a PIM-SM network
D) With Shared Trees access control is always applied at the RP

4. Which unique characteristics of the Data Center Aggregation layer must be considered by an Enterprise Campus designer?

A) Load balancing, firewall services, and other network services are commonly integrated by the use of service modules that are inserted in the aggregation switches.
B) Virtualization tools allow a cost effective approach for redundancy in the network design by using two or four VDCs from the same physical switch.
C) "East-west" server-to-server traffic can travel between aggregation modules by way of the core, but backup and replication traffic typically remains within an aggregation module.
D) Layer 3 routing between the Access and Aggregation layers facilitates the ability to span VLANs across multiple access switches, which is a requirement for many server virtualization and clustering technologies.

5. A network team must provide a redundant secure connection between two entities using OSPF. The primary connection will be an Ethernet Private Line and the secondary connection will be a site-to-site VPN. What needs to be configured in order to support routing requirements for over the VPN connection?

A) Root Certificate
B) GRE Tunnel
C) AAA Server
D) HTTPS

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