Cisco Designing Cisco Network Service Architectures (ARCH) v2.1 Set 1

1.

When a router has to make a rate transition from LAN to WAN, what type of congestion needs should be considered in the network design?

TX-queue starvation TX-queue deferred RX-queue saturation TX-queue saturation RX-queue starvation

2.

To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus?

to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 link to a core switch running Cisco NSF and SSO from redundant distribution switches connected with aLayer 3 link to two core switches from redundant distribution switches connected with a Layer 2 link to two core switches from redundant distribution switches connected with a Layer 3 link to two core switches running Cisco NSF and SSO from two redundant distribution switches runningCisco NSF and SSO

3.

Which of these statements is correct regarding Stateful Switchover and Cisco Nonstop Forwarding?

Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds. Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds. Distribution switches are single points of failure causing outages for the end devices. Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than one second. NSF and SSO with redundant supervisors have the most impact on outages at the access layer.

4.

When is a first-hop redundancy protocol needed in the distribution layer?

when the design implements Layer 2 between the access and distribution blocks when multiple vendor devices need to be supported when preempt tuning of the default gateway is needed when a robust method of backing up the default gateway is needed when the design implements Layer 2 between the access switch and the distribution blocks

5.

Which of these is a recommended practice with trunks?

use ISL encapsulation use 802.1q encapsulation set ISL to desirable and auto with encapsulation negotiate to support ILS protocol negotiation use VTP server mode to support dynamic propagation of VLAN information across the network

6.

Which of the following is a recommended practice of a data center core?

Server-to-server traffic always remains in the core layer. The core infrastructure should be in Layer 3. Core layer should run BGP along with an IGP because iBGP has a lower administrative distance thanany IGP. The Cisco Express Forwarding hashing algorithm is the default, based on the IP address and Layer 4port.

7.

Which statement about data center access layer design modes is correct?

The access layer is the first oversubscription point in a data center design. The data center access layer provides the physical-level connections to the server resources and onlyoperates at Layer 3. When using a Layer 2 looped design, VLANs are not extended into the aggregation layer. When using a Layer 3 design, stateful services requiring Layer 2 connectivity are provisioned from theaggregation layer.

8.

Which of these Layer 2 access designs does not support VLAN extensions?

FlexLinks loop-free U looped square looped triangle loop-free inverted U

9.

Which statement about Fibre Channel communications is correct?

N_Port to N_Port connections use logical node connection points. Flow control is only provided by QoS. It must be implemented in an arbitrated loop. Communication methods are similar to those of an Ethernet bus.

10.

In base e-Commerce module designs, where should firewall perimeters be placed?

core layer Internet boundary aggregation layer aggregation and core layers access and aggregation layers

Cisco Designing Cisco Network Service Architectures (ARCH) v2.1 Set 1

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Cisco Designing Cisco Network Service Architectures (ARCH) v2.1 Set 1

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