Tài liệu TestKing''''s Designing Cisco Network Service Architectures Exam Version 4.1 doc

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TestKing's Designing Cisco Network Service Architectures Exam


Version 4.1

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Note:
Section A contains 75 questions.
Section B contains 267 questions.
The total number of questions is 342.
Each section starts with QUESTION NO :1. There are no missing questions.

Section A

QUESTION NO: 1
Which requirement for an Enterprise Campus network is associated with the increasing amount of users,
data, and applications that the network must expand to support?

A. Functionality
B. Performance
C. Scalability
D. Manageability


Answer: C



QUESTION NO: 2
Which step would you do last in the Enterprise Campus Design Methodology?

A. Design the physical network.
B. Select the routing protocols.
C. Determine the data and application requirements.
D. Design the edge distribution module.
E. Select an IP addressing strategy and numbering scheme.


Answer: A

QUESTION NO: 3
Note: The following 3 questions relate to the scenario below:

TESTKING is manufacturer and importer of fasteners, including nuts and bolts. The main campus is
composed of three buildings that are less than 200 meters apart. All campus wiring is Category 5e
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copper. Network access and distribution devices are currently 100 Mbps hubs, and the core is a 100
Mbps Layer-2 switch.
Development of the network has taken place over the past eight years in a series of steps that involved
minimal planning, with the exception of the WAN links, which have been recently redesigned. The
current network is characterized by slow response and frequent outages.

The engineering department uses a database server located in the engineering building. This server
processes heavy local traffic that keeps the local network at 70% of bandwidth. Accounting uses
commercial package for general ledger, accounts payable, and accounts receivable; these packages are
located on a server in the administration building. This server processes heavy local traffic and light
traffic from other buildings. All other servers are located in the information-processing center.

All employee use e-mail located on one server in the information-processing center. There is a web server
that is available for public use and an internal web server that is available to employees for company
news items and for human resource applications, such as an internal jobs-available database. The
external web server is in a new Corporate Internet module.

The internal network traffic is expected to grow at 10% per year for the next five years. The IT manager
of TESTKING has asked you to design an up-to-date, high-performance, scalable, secure, manageable,

and reliable campus network to meet the strategic goals of TESTKING. Finances are limited, so the
design needs to meet requirements but with minimum cost.

QUESTION NO: 4
Which recommendations would you make based on the provided parameters? (Choose two)

A. Use existing copper wiring to the desktop.
B. Use existing copper wiring between buildings.
C. Use single mode fiber to the desktop.
D. Use multi-mode fiver to the desktop.
E. Use single mode fiber between buildings.
F. Use multi-mode fiver between buildings.


Answer: A, F



QUESTION NO: 5
Where would you locate the device for the Management Module and Server Farm?

A. In the Administration building.
B. In the Engineering building.
C. In the Information-processing building.
D. In all buildings.


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Answer: C



QUESTION NO: 6
Which three modules of the Enterprise Network model will you include in your design? (Choose three)

A. The Campus Core module
B. The Edge Distribution module
C. The Management Module
D. The Corporate Internet module
E. The Server Farm module
F. The building Distribution module


Answer: A, B, E



QUESTION NO: 7
Which high availability design relies more on networks than devices?

A. Clustering
B. Fault tolerance
C. Redundant topology
D. Parallel processing
E. Tripe modular redundancy

Answer: C



QUESTION NO: 8
What is the definition of a fault tolerant device?

A. A backup path exists for every link between the client and the server.
B. Key components can be replaced within the device without turning off power.
C. A backup device exists for every device between the client and the server.
D. Devices can be replaced in the network without interrupting the network operation.
E. The device provides redundant backup within the device for each of its key components.


Answer: A


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QUESTION NO: 9
Which two characteristics drive the choice of a Layer 1 technology for WAN, remote, or Internet access
at the Enterprise Edge? (Choose two)

A. Services offered by the provider.
B. Layer 2 technology

C. Layer 1 media
D. Transportability
E. Loss


Answer: C, E



QUESTION NO: 10
Which three application characteristics are important to the Enterprise Edge design process? (Choose
three)

A. Data content
B. Bandwidth usage
C. Database size
D. Delay sensitivity
E. Loss tolerance


Answer: B, D, E



QUESTION NO: 11
What is the first step in the Enterprise Edge design methodology?

A. Select a service provider.
B. Select a Layer 1 technology.
C. Select a Layer 2 technology.

D. Characterize applications.


Answer: D



QUESTION NO: 12
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Which four components are part of the Enterprise Edge functional area in the Enterprise Composite
Network Model? (Choose four)

A. Internet connectivity
B. Management module
C. VPN/Remote access
D. WAN module
E. Server farm
F. E-Commerce module


Answer: A, C, D, F



QUESTION NO: 13
Which three components would you expect to find in the VPN/Remote Access module? (Choose three)

A. PSTN
B. Access server
C. ISDN
D. IDS
E. Firewall


Answer: B, D, E



QUESTION NO: 14
When using Cisco equipment, what model is used if you are connecting PBX systems that use non-
standard signaling?

A. Translate model
B. Transport model
C. Cross over model
D. Trans-cross model


Answer: A



QUESTION NO: 15
TestKing wants you to design and implement a new Server Farm module with high availability and
performance.
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Which three technologies would you implement at the Server Farm Distribution layer? (Choose three)

A. Mid-range switches
B. Server load balancing
C. Redundant firewalls
D. Redundant switching and links with no single paths or points of failure
E. Caching systems where appropriate


Answer: B, D, E



QUESTION NO: 16
Exhibit:



What is the VPN topology shown in the graphic?

A. Full-mesh VPN
B. Hub-and-spoke VPN
C. Hierarchical VPN
D. Private WAN

Answer: B



QUESTION NO: 17
TestKing is a small company that has a campus consisting of three buildings that are 150 feet apart. The
buildings are connected with single-mode fiber using fast Ethernet. Access to the network is provided by
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10 Mbps hubs with 100 Mbps Ethernet uplinks over multi-mode mode fiber to a switch within each
building. There are over 200 users connected to the hubs by Category 5 wiring.

Management has asked for a new network design that considers scalability, performance, availability,
manageability, and security. Because TestKing is a small company, cost is a major factor.

What wiring infrastructure recommendations would you include in your network design?

A. Install Category 5e copper to the desktop from the wiring closets.
B. Install multi-mode fiber to the desktop from the wiring closets.
C. Replace the multi-mode fiber within the buildings with single-mode fiber-
D. Maintain the current wiring structure.


Answer: D

QUESTION NO: 18
What are two considerations in planning for high availability? (Choose two)

A. Company size
B. Hardware costs
C. Cost of downtime
D. Performance requirements


Answer: A, B



QUESTION NO: 19
What is the recommended maximum number of clients that an individual wireless access point should
support?

A. Between 1 and 8
B. Between 10 and 30
C. Between 32 and 48
D. Between 64 and 96


Answer: B



QUESTION NO: 20
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What are two considerations to using IP Multicast delivery? (Choose two)

A. No congestion avoidance.
B. Not for bandwidth intensive applications.
C. No guaranteed delivery mechanism.
D. Source sends multiple data streams out each interface.
E. Ordered delivery of packets.


Answer: C, E



QUESTION NO: 21
To keep complexity of VLAN design to a minimum, you would choose which of the following?

A. Use campus wide VLANs.
B. Use building distribution level VLANs.
C. Use per-switch VLANs at the access layer.
D. Use VLANs in the campus backbone.


Answer: B, C



QUESTION NO: 22

What are two business concerns increasing the need for remote access? (Choose two)

A. The increased cost of office space.
B. The ability to provide a more flexible work environment.
C. The need for authentication.
D. The need for a method to charge back department cost.


Answer: A, D



QUESTION NO: 23
What are two advantages of designing a high availability network based on a redundant network
topology? (Choose two)

A. The cost of the network is reduced.
B. Network availability can be guaranteed.
C. Redundant topologies are easier to manage and troubleshoot.
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D. The traffic load can be shared between primary and secondary paths.
E. The probability of problems with the physical environment interrupting service is reduced.


Answer: D, E

QUESTION NO: 24
Which protocol can be used to provide WLAN redundancy and low downtime?

A. EAP
B. SNMP
C. WEP
D. HSRP


Answer: D



QUESTION NO: 25
What are two possible advantages of designing a high availability network based on a redundant network
topology? (Choose two)

A. The cost of the network is reduced.
B. Quality of service can be guaranteed.
C. Redundant topologies are easier to configure.
D. The secondary path can automatically take over for the primary path.
E. Individual network device fault tolerance is less critical.


Answer: D, E

QUESTION NO: 26
What can be done to limit area coverage of a wireless access point to provide added security?

A. Lower Mbps data rates.
B. Increases Mbps data rates.
C. Group access point frequency channels.
D. Enable multicasting.


Answer: B
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QUESTION NO: 27
What helps maximize throughput in a wireless LAN? (Choose two)

A. Minimize broadcast.
B. Enable IPSec.
C. Increase size of roaming domains.
D. Use static WEP.
E. Filter multicast traffic.


Answer: A, E

QUESTION NO: 28
Mid-town College wants you to design and implement a new Campus Backbone module that has
multicast and broadcast control, flexible topology, and no spanning tree loops. Cost effectiveness is a
secondary consideration.
Which equipment type would you recommend?

A. High-end routers
B. Mid-level Layer 2 switches
C. High-level Layer 2 switches
D. Layer 3 switches


Answer: C



QUESTION NO: 29
What are the two basic approaches for high-availability design? (Choose two)

A. Redundant Topologies
B. Fault Tolerant Devices
C. Public bandwidth sharing
D. Extremely high MTTR
E. Extremely low MTBF


Answer: A, B

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QUESTION NO: 30
Which component of high availability architecture includes a good software version control and device
configuration control?

A. Network design
B. Operational best practices
C. Device-level hardware reliability
D. Fault management and diagnosis


Answer: B



QUESTION NO: 31
Which protocol would provide block access to remote storage over WAN links?

A. iSCSI
B. FCIP
C. SCSI-FP
D. eSCSI
E. CIFS

Answer: A



QUESTION NO: 32
What is a primary tool to provide perimeter security to a network?

A. VPN
B. L2TP
C. Kerberos
D. Content filter


Answer: A



QUESTION NO: 33
The list on the left contains characteristic and applications that are consistant with either the SAN or
NAS storage network model.
Drag each option to the appropriate box.
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Answer:





QUESTION NO: 34
Scalability is provided in the server farm module by which of the following strategies?

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A. Up to 10 Gbps of bandwidth at the access level.
B. Redundant servers at the access level.
C. Modular block design at the access level.
D. High port densities at the access level.


Answer: C



QUESTION NO: 35
Which VPN management feature would be considered to ensure that the network had the least
disruption of service when making topology changes?

A. Dynamic reconfiguration
B. Path MTU discovery

C. Auto setup
D. Remote management


Answer: D



QUESTION NO: 36
In which four environments would OSPF be a viable choice for a routing protocol? (Choose four)

A. Authentication is required.
B. Load balancing between multiple routes is required.
C. Fast convergence is necessary.
D. External routes are not a concern.
E. NBMA connections exist.
F. The network is non-hierarchical.


Answer: A, B, C, E



QUESTION NO: 37
Redundancy requirements of the WAN from the branch office to a regional office depend on which two
characteristics? (Choose two)

A. Routing requirements
B. Critical importance of the site and the number of users.
C. Impact if the site is an aggregation point.

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D. Impact of the site is offline or unavailable.


Answer: B, C



QUESTION NO: 38
Which three characteristics do you need to observe to analyze an application? (Choose three)

A. Number of servers and users
B. Application type
C. User’s operating system
D. Bandwidth, loss tolerance, and delay characteristics
E. Server speed


Answer: B, C, D



QUESTION NO: 39
Which set of rules governs the handling of both incoming and outgoing calls for a voice system?

A. Dial plan

B. Route plan
C. Dial pattern
D. Call handler
E. Route pattern


Answer: E



QUESTION NO: 40
Which three objectives meet the requirements for the Server Farm module? (Choose three)

A. Provide remote dial-up access.
B. Provide up to 10 Gbps of outbound capacity.
C. Provide scalability with switches and server load balancing.
D. Provide availability with overall network design.
E. Provide high switch port density.


Answer: A, C, D
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QUESTION NO: 41

Static routing is usually used in networks that have which of the following characteristics? (Choose two)

A. Stub networks
B. Multi-homed networks
C. Dial-on-demand networks
D. Smaller expanding networks


Answer: A, D



QUESTION NO: 42
Choose the technology required for a VPN when multicast, broadcast, and non IP packets need to be
tunneled.

A. Triple-DES
B. IPSec
C. GRE
D. IKE
E. ISAKMP


Answer: C



QUESTION NO: 43
Which IOS queuing feature is the currently recommended method for queuing when voice traffic is being
sent?

A. CQ
B. PQ
C. LLQ
D. WFQ
E. IO RTP Priority


Answer: E



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QUESTION NO: 44
Which three are IOS queuing techniques? (Choose three)

A. CQ
B. PQ
C. LLQ
D. CAR
E. NBAR


Answer: A, B, C

QUESTION NO: 45
Which statement characterizes a network well designed for QoS?

A. Packets are classified at each router within the network.
The classification is based on as many details as possible, typically using extended IP ACLs to match
the packets.
B. Packets are classified and marked, close to the edge of the network.
The packets are treated differently based on this marking at the routers in the middle of the network.
C. Packets are classified based on different parameters, but close to the edge of the network.
The packets are characterized automatically based on flow at the routers in the middle of the network.
D. Packets are classified based on socket address, at the router closets to the source of the traffic.
The packets are characterized automatically based on flow at the routers in the middle of the network.


Answer: B



QUESTION NO: 46
Which Layer 3 protocol is used to provide data integrity, privacy, and security on an IP based VPN?

A. GRE
B. MD5
C. PKI
D. IPSec
E. L2TP


Answer: D

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QUESTION NO: 47
Which networking technology can provide guaranteed availability of network resources for mission-
critical, interactive, and time-sensitive Internet business applications?

A. QoS
B. Resiliency
C. Redundancy
D. Fault tolerance
E. Load balancing


Answer: A



QUESTION NO: 48
What would be a result of failing to check the LAN/WAN utilization before implementing a VoIP design?

A. An echo due to excessive delays.
B. An improper codec selection.
C. The data link being oversubscribed.
D. A decrease in the probability of call blocking

Answer: A



QUESTION NO: 49
Users of a site-to-site VPN are reporting performance problems. The VPN connection employs IPSec and
GRE and traverses several Ethernet segments. The VPN packets are being fragmented as they traverse
the links.
What would be two methods to overcome this problem? (Choose two)

A. Employ path MTU discovery.
B. Set the MTU higher than 1500 bytes.
C. Turn off pre-fragmentation for IPSec.
D. Set the MTU value to 1400 bytes.


Answer: C, D



QUESTION NO: 50
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What is the first step that you would use Cisco Product Advisor for when selecting a router for an Edge
solution?

A. Determine types of protocols to be supported.
B. Determine the environment in which the router will be used.
C. Select the number of WAN ports required.
D. Select the number of LAN ports required.


Answer: C



QUESTION NO: 51
Which Cisco Works VPN/Security Management Solution gives administrators access to devices showing
real-time status along with operational and configuration functions through a web browser?

A. VPN Monitor
B. CSPM
C. Resource Manager (RME)
D. Cisco View
E. IDS Host Sensor


Answer: A



QUESTION NO: 52
In which Frame Relay PVC configuration, carrying both voice and data, is the potential voice load better
understood and partially isolated from the data load?

A. Duplex PVCs
B. Simplex PVCs
C. Separate PVCs
D. Combined PVCs


Answer: C



QUESTION NO: 53
Which codec is recommended for higher quality voice over a data network?

A. G.711
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B. G.723
C. G.726
D. G.728
E. G.729


Answer: A



QUESTION NO: 54

What causes Egress Blocking?

A. Large data packets blocking voice packets.
B. Large voice packets blocking data packets.
C. Re-transmission of packets blocking all traffic.
D. Excessive data fragmentation.


Answer: A



QUESTION NO: 55
Which three characteristics normally define a Campus Backbone submodule? (Choose three)

A. Provides high speed, low overhead of low latency switching.
B. Implements policy-based filtering.
C. Transports aggregate traffic from the other submodules and functional areas.
D. Partial mesh generally used to avoid redundant links.
E. Generally, no policy enforcement.


Answer: A, C, E



QUESTION NO: 56
When using a centralized call-processing model, what should be implemented at the remote locations for
failover purposes?

A. HSRP
B. PSTN
C. SNAP
D. SRST

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Answer: D



QUESTION NO: 57
Which ATM service class is appropriate for traffic that cannot tolerate delay or loss?

A. Available Bit Rate (ABR)
B. Unspecified Bit Rate (UBR)
C. Real Time Variable Bit Rate (rt-VBR)
D. Constant Bit Rate (CBR)
E. Non-Real Time Bit Rate (nrt-VBR)


Answer: D



QUESTION NO: 58

You are designing a network that requires private internal addressing for users within the TestKing
organization and also requires a website for external users. TestKing has been issued a portion of a Class
C address from their ISP. There are 320 users that will need access to the Internet.
Which two types of Network Address Translation would you propose? (Choose two)

A. Persistent
B. Dynamic
C. Static
D. Overlapping


Answer: B, C



QUESTION NO: 59
You have just completed determining the application and data requirements for a new network design.
Which design step would you do next?

A. Select the IP addressing strategy and numbering.
B. Select the routing protocols.
C. Design the physical network.
D. Design the logical network.


Answer: D
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QUESTION NO: 60
What does the Cisco IP phone set the CoS/ToS value for voice packets to?

A. 1
B. 3
C. 5
D. 7


Answer: C



QUESTION NO: 61
You are asked to design a VPN for a medium sized company, TestKing Ltd. TestKing has 12 stationary
offices and one main office. Each office is more than 80 miles away from the next.
What type of VPN would you design for this situation?

A. Remote access VPN
B. Site to site VPN
C. Enterprise remote access VPN
D. Wireless VPN


Answer: B

QUESTION NO: 62
To ensure voice packets are kept within the Committed Information Rate (CIR) of a Frame Relay link,
what should be used in the CPE?

A. Prioritization
B. Classification
C. Fragmentation
D. Traffic shaping
E. Traffic policing


Answer: E



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QUESTION NO: 63
What four functions does Web Cache Communication Protocol (WCCP) incorporate? (Choose four)

A. Load balancing
B. Scalability
C. Remote management
D. Fault tolerance
E. Network address translation

F. Service assurance


Answer: A, B, D, F



QUESTION NO: 64
What is the device weight limit per CallManager in a Cisco IP phone configuration?

A. 2500
B. 3000
C. 5000
D. 6500


Answer: C



QUESTION NO: 65
Which of the following is a web-browser based tool designed to provide administrative access for content
networking?

A. Content Distribution Manager (CDM)
B. Self-Organizing Distributed Architecture (SODA)
C. Web Cache Communication Protocol (WCCP)
D. Cisco CallManager
E. Hypertext Administration Design (HAD)

Answer: A



QUESTION NO: 66
Which Cisco network management tools is targeted toward small to medium-size business?

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A. Netsys
B. CiscoAssure
C. CiscoWorks Lite
D. CiscoWorks Blue
E. CiscoWorks for Windows


Answer: E



QUESTION NO: 67
What device acts as a bridge between the IP network and a Fiber Channel SAN?

A. FC-HBA attached host
B. FC Switch
C. Storage Router

D. NAS GE Switch


Answer: B



QUESTION NO: 68
Which signaling technique is used for intercluster calls between Call Manager clusters?

A. SS7
B. H.323
C. MGCP
D. Skinny


Answer: B



QUESTION NO: 69
When dealing with transparent caching, where should the Content Engines be placed?

A. Close to the servers.
B. Close to the end users.
C. At the Internet edge.
D. In front of web server farms.