Testking cisco 646-227
Vendor: cisco
Exam Code: 646-227
Exam Name: Lifecycle Services Advanced IP Communications Exam (APE for Validating Knowledge )
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Question: 6
Cisco recommends the use of a headend-grade coaxial cable or a quad-shield coaxial cable with
a minimum of 60% + 40% braid and double foil insulation to connect the cable modem cards to
the HFC network. The center conductor must be straight and extend 1/8 inch (3.2 mm) beyond
the end of the connector, and the connector should be securely crimped to the cable. Select three
recommended cable types that can be used to connect the Cisco uBR7200 series universal
broadband routers: (multiple answer)
A. RG 58
B. RG 59
C. RG 59/U
D. RG 6
E. RG 7
Answer: B, C, D
Question: 7
Given a PAL HFC and 8 MHz channel lineup in the downstream, is it possible to utilize 6 MHz
DOCSIS cable modems and signals on the network?
A. No, only 8 MHz channel spacing is available for Downstream data signals
B. Yes, as long as the 6 MHz DOCSIS signal is within a valid 8 MHz channel
C. Yes, as long as the DOCSIS signal is upconverted through a PAL upconverter
D. No, DOCSIS cannot be mixed with EuroDOCSIS in the Donwstream
E. DOCSIS must be used only in an EIA-542 channel plans
Answer: B
Question: 8
In a cable HFC plant, which devices are modulators? (multiple answer)
A. CMTS line card
B. Upconverter
C. Diplex filter
D. Set top box
E. Fiber node
Answer: A, D
Question: 9
Unity gain is being used for alignment. The first amplifier from the node has 25 dB of gain and is
2000 feet away with cable loss of 1 dB per 100 feet. The node has an output of 35 dBmV at 55.25
MHz. What is the input at the amplifier?
A. 13dBmV
B. 3dBmV
C. 15dBmV
D. 27dBmV
Answer: C
Question: 10
There are two different headends with two different frequencies available sharing the same plant.
There is a -10dB cable loss to the second active in the cascade. What is the required pad for
balancing
A. A 0 pad
B. A 1 pad
C. A 2 pad
D. A 3 pad
E. A 4 pad
F. A 5 pad
Answer: F
Testking 646-227
Questions and Answers : 220 Q&As
Updated: 2008-11-13
Price: $125.99
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