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QUESTION NO:17

What is the primary consideration when choosing a routed network design over a traditional campus network design?

A. Layer 3 service support at the network edge

B. the routing protocol choicE.open (OSPF) or proprietary (EIGRP)

C. the routing abilities of the host devices

D. the need to control the broadcast domains within the campus core

Correct Answer: A Explanation

Explanation/Reference:

Explanation:

Layer 3 ability at network edge should be available to leverage the benefits of routed network design. Link: http://www.cisco.com/en/US/docs/solutions/Enterprise/

Campus/campover.html


QUESTION NO:15

Which two statements about designing the Data Center Access layer are correct? (Choose two.)

A. Multiport NIC servers should each have their own IP address.

B. Layer 3 connectivity should never be used in the access layer.

C. Layer 2 connectivity is primarily implemented in the access layer.

D. Multiport NIC servers should never be used in the access layer.

E. Layer 2 clustering implementation requires servers to be Layer 2 adjacent. Correct Answer: CE

Explanation Explanation/Reference:

Explanation:

User access is primarily layer 2 in nature, layer 2 clustering is possible only in layer 2 Here is the Explanation: from the Cisco press CCDA certification guide Figure 4-8. Enterprise Data Center Infrastructure Overview Defining the DC Access Layer The data center access layer\’s main purpose is to provide Layer 2 and Layer 3 physical port density for various servers in the data center. In addition, data center access layer switches provide high- performance, low-latency switching and can support a mix of oversubscription requirements. Both Layer 2 and Layer 3 access (also called routed access) designs are available, but most data center access layers are built using Layer 2 connectivity. The Layer 2 access design uses VLAN trunks upstream, which allows data center aggregation services to be shared across the same VLAN and across multiple switches. Other advantages of Layer 2 access are support for NIC teaming and server clustering that requires network connections to be Layer 2 adjacent or on the same VLAN with one another.

CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 4


QUESTION NO:5

In which phase of PPDIOO are the network requirements identified?

A. Design

B. Plan

C. Prepare

D. Implement

E. Operate

F. Optimize

Correct Answer: B Explanation

Explanation/Reference:

Explanation:

Plan Phase The Plan phase identifies the network requirements based on goals, facilities, and user needs. This phase characterizes sites and assesses the network, performs a gap analysis against best-practice architectures, and looks at the operational environment. A project plan is developed to manage the tasks, responsible parties, milestones, and resources to do the design and implementation. The project plan aligns with the scope, cost, and resource parameters established with the original business requirements. This project plan is followed (and updated) during all phases of the cycle.


QUESTION NO:2

Characterizing an existing network requires gathering as much information about the network as possible.Which of these choices describes the preferred order for the information-gathering process?

A. Site and network audits, traffic analysis, existing documentation and organizational input

B. Existing documentation and organizational input, site and network audits, traffic analysis

C. Traffic analysis, existing documentation and organizational input, site and network audits

D. Site and network audits, existing documentation and organizational input, traffic analysis Correct Answer: B

Explanation Explanation/Reference:

Explanation:

This section describes the steps necessary to characterize the existing network infrastructure and all sites. This process requires three steps:

Step 1. Gather existing documentation about the network, and query the organization to discover additional information. Organization input, a network audit, and

traffic analysis provide the key information you need. (Note that existing documentation may be inaccurate.)

Step 2. Perform a network audit that adds detail to the description of the network. If possible, use traffic-analysis information to augment organizational input when

you are describing the applications and protocols used in the network.

Step 3. Based on your network characterization, write a summary report that describes the health of the network. With this information, you can propose hardware

and software upgrades to support the network requirements and the organizational requirements.


QUESTION NO:21

The enterprise campus core layer has requirements that are unique from the distribution and access layers.Which of the following is true about the core layer?

A. The core layer provides convergence using Layer 2 and Layer 3 services and features.

B. The core layer provides high availability to support the distribution layer connections to the enterprise edge.

C. The campus core layer is optional.

D. The core layer requires high performance to manage the traffic policing across the backbone.

Correct Answer: C Explanation

Explanation/Reference:


QUESTION NO:11

Which two of the following are benefits of using a modular approach to network design?(Choose two.)

A. improves flexibility

B. facilitates implementation

C. lowers implementation costs

D. improves customer participation in the design process

Correct Answer: AB Explanation

Explanation/Reference:


QUESTION NO:3

You want to gather as much detail as possible during a network audit with a minimal impact on the network devices themselves.

Which tool would you use to include data time stamping across a large number of interfaces while being customized according to each interface?

A. RMON

B. SNMPv3

C. NetFlow

D. Cisco Discovery Protocol Correct Answer: C

Explanation Explanation/Reference:


QUESTION NO:30

High availability is a key design consideration in the enterprise campus network. In a fully redundant topology, which is likely to provide faster IGP convergence during a failure?

A. redundant supervisors

B. redundant supervisors with Cisco Nonstop Forwarding (NSF) and Stateful Switchover (SSO)

C. single supervisors with tuned IGP timers

D. single supervisors

Correct Answer: C Explanation

Explanation/Reference:

Explanation:

In a fully redundant topology with tuned IGP timers, adding redundant supervisors with Cisco nonstop forwarding (NSF) and stateful switchover (SSO) may cause longer convergence times than single supervisors with tuned IGP timers. NSF attempts to maintain the flow of traffic through a router that has experienced a failure. NSF with SSO is designed to maintain a link-up Layer 3 up state during a routing convergence event. However, because an interaction occurs between the IGP timers and the NSF timers, the tuned IGP timers can cause NSF-aware neighbors to reset the neighbor relationships.


QUESTION NO:8

Refer to the exhibit.

Which statement accurately represents the characteristics of the core layer in this design?

A. QoS should only be performed only in the core.

B. Load balancing should never be implemented or used.

C. Access lists should be used in the core to perform packet manipulation.

D. Partial mesh should be used as long as it is connected to each device by multiple paths.

E. Policy-based traffic control should be implemented to enable prioritization and ensure the best performance for all time-critical applications.

Correct Answer: D Explanation

Explanation/Reference:


QUESTION NO:22

When there is a need for immunity to EMI for connecting locations that are greater than 100 meters apart, which two solutions can be utilized? (Choose two.)

A. multimode fiber

B. Fibre Channel

C. HVDC transmission lines

D. single-mode fiber

E. serial RS-232

F. Gigabit Ethernet 1000BASE-CX

Correct Answer: AD Explanation

Explanation/Reference:


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