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Q97. Which Gigabit Ethernet media type provides the longest reach without a repeater? 

A. 1000Base-CX 

B. 1000Base-LX 

C. 1000Base-SX 

D. 1000Base-T 

Answer:


Q98. Which two mechanisms are used by distance vector protocols to prevent routing loops? (Choose two.) 

A. split horizon 

B. route summarization 

C. route poisoning 

D. tuned timers 

Answer: A,C 


Q99. 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 

Answer:

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. 


Q100. Which network virtualization technology involves creating virtual routers with its own individual routing tables on a physical router? 

A. VSS 

B. vPC 

C. VRF 

D. VLAN 

Answer:


Q101. By default, how does EIGRP's metric differ from OSPF? 

A. hops 

B. cost 

C. bandwidth 

D. delay 

Answer:


Q102. What two performance considerations must be taken into account when designing a remote worker access solution? (Choose two.) 

A. simultaneous VPN connections 

B. port density 

C. throughput capacity 

D. packet size 

E. latency 

Answer: A,C 


Q103. 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. Fiber Channel 

C. HVDC transmission lines 

D. single-mode fiber 

E. serial RS-232 

F. Gigabit Ethernet 1000BASE-CX 

Answer: A,D 


Q104. 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. 

Answer:


Q105. Which Cisco device management feature is most suited to metering network traffic and providing data for billing network usage? 

A. BGP 

B. Cisco Discovery Protocol 

C. QoS 

D. RMON 

E. NetFlow 

Answer:


Q106. What characteristic separates link state routing protocols from a distance vector? 

A. creates a topological view of the entire network 

B. path calculation utilizes a more granular metric 

C. does not scale well for large networks 

D. constantly shares link state updates throughout the topology 

Answer:


Q107. Which of these is the equation used to derive a 64 Kbps bit rate? 

A. 2 x 8 kHz x 4-bit code words 

B. 8 kHz x 8-bit code words 

C. 2 x 4-bit code words x 8 kHz 

D. 2 x 4 kHz x 8-bit code words 

Answer:

Explanation: While the human ear can sense sounds from 20 to 20, 000 Hz, and speech encompasses sounds from about 200 to 9000 Hz, the telephone channel was designed to operate at about 300 to 3400 Hz. This economical range carries enough fidelity to allow callers to identify the party at the far end and sense their mood. Nyquist decided to extend the digitization to 4000 Hz, to capture higher-frequency sounds that the telephone channel may deliver. Therefore, the highest frequency for voice is 4000 Hz. According to Nyquist theory, we must double the highest frequency, so 2x4kHz = 8kHz. 

Each sample will be encoded into a 8-bit code. Therefore 8kHz x 8-bit code = 64 Kbps (notice about the unit Kbps: 8kHz = 8000 samples per second so 8000 x 8-bit = 64000 bit per second = 64 Kilobit per second = 64 Kbps) 

Link: http://encyclopedia2.thefreedictionary.com/Nyquist+theorem 

Note: 

Nyquist theory: 

“When sampling a signal (e.g., converting from an analog signal to digital), the sampling frequency must be greater than twice the bandwidth of the input signal in order to be able to reconstruct the original perfectly from the sampled version.” 


Q108. Which two of these are scalability benefits of designing a network that utilizes VPNs? (Choose two.) 

A. extends the network to remote users 

B. allows networks to be set up and restructured quickly 

C. reduces dial infrastructure expenditures 

D. reduces the number of physical connections 

E. simplifies the underlying structure of a customer WAN 

Answer: D,E 


Q109. Which two routing protocols usually converge most quickly? (Choose two.) 

A. RIPv1 

B. RIPv2 

C. BGP 

D. OSPF 

E. EIGRP 

Answer: D,E 


Q110. Which is the purpose of the Cisco NAC Profiler? 

A. Automates discovery and inventory of all LAN attached devices 

B. Generates a profile based on username and group 

C. Learns and creates a database of virus definitions based on LAN traffic 

D. A database used to map user VPN accounts 

Answer:

Explanation: 

Cisco NAC Profiler: Enables network administrators to keep a real-time, contextual inventory of all devices in a network. It greatly facilitates the deployment and management of Cisco Network Admission Control (NAC) systems by discovering and tracking the location and type of all LAN-attached endpoints, including those that are not capable of authenticating. It also uses the information about the device to determine the correct policies for NAC to apply. 


Q111. Which voice codec should you use in order to provide toll quality calls? 

A. G.711 

B. G.718 

C. G.722 

D. G.729 

Answer:


Q112. Which WLC interface is dedicated for WLAN client data? 

A. virtual interface B. dynamic interface 

C. management interface 

D. AP manager interface 

E. service port interface 

Answer:

Explanation: 

WLC Interface Types 

A WLC has five interface types: 

Management interface (static, configured at setup, mandatory) is used for in-band management, connectivity to AAA, and Layer 2 discovery and association. 

Service-port interface (static, configured at setup, optional) is used for out-of-band management. It is an optional interface that is statically configured. 

AP manager interface (static, configured at setup, mandatory except for 5508 WLC) is used for Layer 3 discovery and association. It has the source IP address of the AP that is statically configured. 

Dynamic interface (dynamic) is analogous to VLANs and is designated for WLAN client data. 

Virtual interface (static, configured at setup, mandatory) is used for leaver 3 security authentication, DHCP relay support, and mobility management.