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Cisco Designing Cisco Network Service Architectures Sample Questions:

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

A) 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.
B) Load balancing, firewall services, and other network services are commonly integrated by the use of service modules that are inserted in the aggregation switches.
C) Virtualization tools allow a cost effective approach for redundancy in the network design by using two or four VDCs from the same physical switch.
D) "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.

2. A network engineer is designing an address plan based on network applications. Which application presents the greatest need for its own address block?

A) physical security
B) multicast
C) management
D) IP telephony

3. Which two services are provided at the aggregation layer in a data center design? (Choose two.)

A) high-speed packet switching backplane
B) service module integration
C) Layer 3 domain definitions
D) network interface card teaming
E) default gateway redundancy

4. Which two benefits are achieved if a network is designed properly with a structured addressing scheme? (Choose two.)

A) hardened security
B) added resiliency
C) easier troubleshooting
D) efficient ACLs
E) improved redundancy

5. With respect to address summarization, which of the following statements concerning IPv4 and IPv6 is true?

A) The potential size of the IPv6 address blocks suggests that address summarization favors IPv6 over IPv4.
B) WAN link addressing best supports summarization with a /126 subnet for IPv4 and a /31 for IPv6.
C) Role based addressing using wildcard masks to match multiple subnets is suitable for IPv4, but unsuitable for IPv6.
D) In order to summarize, the number of subnets in the IPv4 address block should be a power of 2 while the number of subnets in the IPv6 address block should be a power of 64.

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