[Free] 2018(May) EnsurePass Examcollection Cisco 650-667 Dumps with VCE and PDF 11-20

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Cisco SP Video Cable Access Networks Design for SE

Question No: 11

If a customer requests redundant optical links between a hub and the nodes which solution is possible using current Cisco products?

  1. Put an optical switch in each node.

  2. Install two nodes in tandem.

  3. Install dual optical receivers in each node.

  4. It is not possible to have redundant links to the node.

Answer: C

Question No: 12

When a high-power optical signal passes through a fiber, the photons can cause a quot;ringing- of the crystal lattices within the glass fiber core. This ringing creates acoustic phonons, which in turn interact with other photons of light. The result is an increase in noise in the received RF signal. What is this phenomenon called?

  1. double Rayleigh backscattering

  2. stimulated Brillouin scattering (SBS)

  3. Raman pumping

  4. Chirp

Answer: B

Question No: 13

When 3 Cisco gain-flattened ED FA is operated in the quot;constant gain#39; mode, it has which one of these characteristics?

  1. fixed aggregate optical power at the output when new wavelengths are added

  2. a fixed gain, determined at the factory and specified by a unique ordering code

  3. fixed gain per wavelength, even when new wavelengths are added

  4. a gain that is tightly controlled by an AGC system, provided that no new wavelengths are added

Answer: D

Question No: 14

What are the two primary advantages of optical transmission at 1550 nm? (Choose two.)

  1. lower optical attenuation

  2. ability to optically amplify the signal

  3. lower cost of equipment

  4. less power consumption

  5. smaller equipment size

Answer: B,C Explanation: ref:

http://www.cisco.com/en/US/prod/collateral/video/ps8806/ps8862/ps8874/product_data_sh eet0900aecd806c4957.pdf

Question No: 15

In general, which technique is less expensive when automatic protection switching is required to improve reliability in an optical link between a headend and a hub?

  1. optical switching

  2. wavelength switching under Cisco ROSA control

  3. RF switching

  4. patch panel

Answer: A

Question No: 16

What is the modulation format used in Digital Video Broadcast-S?

  1. QAM 256

  2. FDM

  3. QPSK

  4. FM

Answer: C

Question No: 17

Which method is used to increase the bandwidth that is available in the upstream signal path to each subscriber?

  1. node segmentation

  2. increasing the upper frequency limit of the HFC plant

  3. installing more cable modems

  4. increasing the logical size of each node

Answer: A

Explanation: Ref: http://www.motorola.com/staticfiles/Video- Solutions/_Documents/static files/WDM CWDM DWDM Segmentation Primer.pdf Page 4.

Question No: 18

What network management system can monitor and control video headend equipment?

  1. ANA

  2. Cisco Works

  3. ROSA

  4. SNMP

Answer: C

Question No: 19

NO: 19

Which wavelength of optical signals can be amplified?

  1. 200 nm

  2. 850 nm

  3. 1310 nm

  4. 1550 nm

Answer: C

Explanation: Ref: http://www.angelfire.com/nd/ramdinchacha/SEP00.html

Question No: 20

Which type of outside plant equipment does Cisco build?

  1. DSL

  2. HFC

  3. POTS

  4. ISDB-T

Answer: D

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