What is one reason why broadband cable operators install fiber-optic cable in stages instead of changing the infrastructure all at once? - correct
... [Show More] answerChanging the infrastructure all at once would cause too many service disruptions.
What is the difference between the fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC) topologies? - correct answerAn FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premises.
Which of these components is used in a passive optical network (PON)? - correct answerOptical splitters.
Which type of star topology used in a passive optical network (PON) places the PON splitters into fiber access terminal (FAT) located deep in the network and closer to the customer premises than the centralized split? - correct answerDistributed star.
Which element of a passive optical network (PON) uses a Bragg grating filter? - correct answerOptical line terminal (OLT).
Which element of a passive optical network (PON) uses patch panels? - correct answerOptical distribution network (ODN).
What is it about radio frequency over glass (RFoG) that made broadband cable operators envision using it to make a seamless transition from the legacy hybrid fiber/coax (HFC) architecture over to a gigabit-capable passive optical network (GPON) or Ethernet passive optical network (EPON)? - correct answerRFoG can operate in parallel with GPON or EPON, which eliminates the need for any downtime during the transition.
How are optical splitters used in the forward path? - correct answerIn the forward path, optical splitters are used as passive branching devices that divide an optical signal across multiple output fibers.
Which of the following describes a fiber pigtail? - correct answerFiber-optic cable with pre-connectorized ends.
Heat shrink tubing is installed over the fusion-splice to strengthen and protect it. When should the heat shrink be installed on the fiber? - correct answerBefore stripping the plastic coating from the fiber.
Which of the following are statements of true axioms? - correct answerWhen A = C and B = C, then A = B because both are equal to C, which supports the axiom: Quantities equal to the same quantity are equal to each other.
Simplify and solve the equation: If E = IR then I = ? - correct answerE/R
The square of 7 = - correct answer49
The square root of 81 = - correct answer9
0.00004 = ______ x 10 to the power of ______. - correct answer4, -5
(75 x 10 to the power of 3) + (25 x 10 to the power of 4) = - correct answer32.5 x 10 to the power of 4
10 to the power of -3 has a metric prefix of ______. - correct answerMilli
(480 x 10 to the power of -5) divided by (60 x 10 to the power of -3) = - correct answer8 x 10 to the power of -2
(250 x 10 to the power of -6) - (7 x 10 to the power of -5) = - correct answer180 x 10 to the power of -6
(75 × 103) + (25 × 104) = - correct answer(*Wrong) 100 × 10^3
(-25) + (42) + (-62) + (20) = - correct answer-25
(17) x (-19) = - correct answer-323
(-17) - (-34) = - correct answer17
-49/-7 = - correct answer7
(20) / (-4) + (-2) x (-10) - (-2) x (7) = - correct answer29
3 6/9 + 6 1/3 + 9 5/9 = - correct answer19 5/9
4/7 x 9 4/11 = - correct answer5 27/77
7 3/8 divided by 7 1/4 = - correct answer1 1/58
8.13 X 0.123 = - correct answer0.99999
0.5349 divided by 0.1420 = - correct answer3.7669014
Which of the following is a method for controlling expectations? - correct answerIdentify the source of emotional overload.
Which of the following best describes stereotyped thinking? - correct answerPresuming that all members of a group have certain characteristics.
The attribute of being "active" as a critical thinker means - correct answerYou observe and take notes relevant to the issue.
What kind of reasoning is described as applying a general statement that you know to be true to a new situation? - correct answerDeductive.
It is essential to pay attention to warning signs of stress overload. Poor attitude is one of the behaviors that may indicate that you are overstressed. What are the symptoms of poor attitude behavior? - correct answerA significant change in attitude with a noticeable movement toward negative, hostile, cynical, or paranoid thoughts
You are at a customer's home and you are asking the customer whether the problem is intermittent or constant. Which step are you using from the six-step troubleshooting process? - correct answerIdentifying the problem.
Why should you take the time to take notes and accurately record data at each job location? - correct answerNotes and recorded data are tools that can help you accurately remember events at a site that can help you determine a plan of action or evaluate the decisions you made.
You are at a customer's home and you believe you have solved the problem. When you check to be sure the resolution did not introduce any new problems, which step are you using from the six-step troubleshooting process? - correct answerVerifying the solution.
To break the habit of a negative self-talk cycle - correct answerTell yourself "not now" and move onto a positive thought whenever negative thoughts occur.
By taking control of the expectations you have, you are - correct answerMore likely to improve your motivation and be a better problem solver.
Which of the following characterizes the successful troubleshooter? - correct answerSomeone with an inquisitive and relentless desire to solve and fix problems.
What must a technician be aware of when analyzing a digital TV (DTV) problem? - correct answerThere is frequently more than one contributor to a specific DTV service problem.
After a digital TV (DTV) service problem has been analyzed and possible causes considered, what is accomplished by isolating the various network elements? - correct answerIt narrows the scope of likely problem sources.
During which step of the six-step troubleshooting process for a digital TV (DTV) service problem are quadrature amplitude modulation (QAM) channel measurements typically taken? - correct answerDiagnosing symptoms.
When replacing a splitter to resolve a digital TV (DTV) service problem, what does confirming the splitter output levels before attaching the output connectors do? - correct answerConfirmation reinforces the technician's confidence that the problem will be resolved by replacing the splitter.
Which of the following digital TV (DTV) trouble calls could have been avoided with customer education about the product? - correct answerThe digital set-top box (STB) overheats.
When troubleshooting a digital TV (DTV) authorization issue, what can be verified using the set-top box (STB) diagnostic page? - correct answerSTB reception of authorization message data.
Which type of set-top box (STB) operates more like Data Over Cable Service Interface Specification (DOCSIS) cable modems with return channels on the same frequencies used for cable modems? - correct answerSTB with DOCSIS Set-top Gateway (DSG) client software and embedded DOCSIS modems.
Because the spectral density of a quadrature amplitude modulation (QAM) channel is much higher than that of an analog TV channel, what is done to ensure equal power in all channels in a network with analog and digital modulation channels? - correct answerOperate the analog TV channels at higher amplitude level than the QAM channels.
What does a set-top box (STB) diagnostic page of a quadrature amplitude modulation (QAM) channel showing signal-to-noise ratio (SNR) near or below 30 dB indicate? - correct answerThe QAM channel quality is on the edge for reliable reception, and the source of the problem is likely in the distribution network or customer premises.
Which Data over Cable Service Interface Specification (DOCSIS) layer is used by the cable modem termination system (CMTS) to differentiate between cable modems? - correct answerThe DOCSIS Media Access Control (MAC) Layer.
What was introduced in Data Over Cable Service Interface Specification (DOCSIS) 3.0 to allow enough bandwidth for upstream carriers from previous DOCSIS versions? - correct answerThe option to increase the top frequency of the upstream to 85 MHz.
In a Data Over Cable Service Interface Specification (DOCSIS) network, why is the data throughput over the return or upstream path typically less than the throughput of data over the forward or downstream path? - correct answerCompared to the downstream path, the narrower bandwidths and lower orders of modulation used to transport data over the return path cause the downstream and upstream data throughput to be unequal or asymmetrical.
What would be the downstream throughput if two quadrature amplitude modulation (QAM) channels with a throughput of 38 megabits per second (Mbps) were bonded? - correct answer76 Mbps.
What are two features that were added in Data Over Cable Service Interface Specification (DOCSIS) 3.1 to extend the viability of hybrid fiber/coax (HFC) networks into the next decade? - correct answerOrthogonal frequency division multiplexing (OFDM) and low-density parity-check (LDPC).
How does Internet protocol (IP) multicast differ from IP broadcast? - correct answerIP multicast traffic is only sent to specific modem addresses on the network; IP broadcast traffic is sent to all modems on the network.
Which step in the troubleshooting process requires a discussion with the customer to gather more detail about the problem? - correct answerStep 1: Identify the problem.
When analyzing a problem, what can the technician learn by asking the customer to show or demonstrate the problem? - correct answerThe symptoms of the problem can be viewed and any unusual screens or customer entries can be identified.
When using a digital signal analyzer to troubleshoot data throughput in the Data Over Cable Service Interface Specification (DOCSIS) network, what is the minimum modulation error ratio (MER) into the cable modem for a 256- quadrature amplitude modulation (QAM) carrier? - correct answer32 dB or greater.
What layers of the Open Systems Interconnection (OSI) reference model are specific to cable networks and are present only between Data Over Cable Service Interface Specification (DOCSIS) modems and the cable modem termination system (CMTS)? - correct answerLayers 1 through 4 (Physical layer, Data Link Layer, Network Layer, and Transport Layer) are applied between the DOCSIS modem and CMTS.
A customer reports a problem of no dial tone (NDT). Upon inspection, the technician notices that new carpeting has been installed. What should the technician do next? - correct answerLook for a cable that runs under the carpet; it is likely that the cable has a short from the carpeting tack strip.
What is the likely problem when there is dial tone on one phone connected to an outlet, but not on two other phones connected to two different outlets? - correct answerAn open circuit caused by a break in a conductor, poor contact in a modular connector, or an incorrect wire connection. [Show Less]