单项选择题

Which of these recommendations is most appropriate for the core layer in the Cisco Campus Architecture？（）

A. Utilize Layer 3 switching
B. Utilize software accelerated services
C. Aggregate end users and support a feature-rich environment
D. Perform packet manipulation and filtering at the core layer
E. Use redundant point to-point Layer 2 interconnections when where is a link or node failure.

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单项选择题

There are 3 steps to confirm whether a range of IP address can be summarized. When of thefollowing is used in each of these 3 steps？（）

A. The first number in the contiguous block of addresses
B. The last number in the contiguous block of addresses
C. The size of the contiguous block of addresses
D. The subnet mask of the original network address

多项选择题

Which two restrictions must the Enterprise Campus network designer consider when evaluatingWAN connectivity options？（）

A. OSPF over multicast EMS or VPLS network may not have consistent broadcast or multicastperformance
B. IP multicast is not supported over Lover 3 MPLS VPN； instead a Layer 2 MPLS WN must beutilized with service provider support
C. QoS requirements with MPLS-VPN must be implemented by the service provider
D. Hierarchical VPLS designs are the least scalable
E. IGMP snooping is not on option with VPLS or EMS； instead administrative scoping or allowingsufficient bandwidth for unnecessary multicast traffic at the edge links is required

单项选择题

Which technology is an example of the need for a designer to clearly define features and designedperformance when designing advanced WAN services with a service provider？（）

A. FHRP to remote branches.
B. Layer 3 MPLS VPNs routing.
C. Control protocols （for example Spanning Tree Protocol） for a Layer 3 MPLS service.
D. Intrusion prevention， QoS， and stateful firewall support network wide.