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NCEA questions with correct answers

NCTI Service Technician questions with correct answers

When pressure testing a drop system to check for leakage, What must be done before applying the test signal? Answer The technician must isolate the drop system from the hybrid fiber/coax (HFC) network by disconnecting the drop at the distribution tap. Why do some leakage detection systems utilize a leakage carrier modulated with a tagging signal? Answer To avoid false detection of leaks. When all three sections of a pulse code modulator (PCM) are combined, what function can be performed? A...

According to SCTE- and NCTA- recommended trunk system map symbols, fiber-optic cable is represented by Answer Double arrows within a small circle on a solid line. The forward path signal in a traditional tree-and-branch architecture Answer originates at the headend and is transmitted downstream through coaxial trunk cable and trunk amplifier. In a HFC network, Answer Processing equipment in the headend converts the forward RF signal to a light signal. During aerial plant construction, A...

What is the difference between the FTTN and FTTC topologies? Answer An FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premises. What are the three categories of the fiber-optic cable used to identify the location of the fiber in the network? Answer Truck, branch, and drop Which type of fiber topology used in a PON places the PON splitters at the headend while providing one designated fiber for every customer premise? Answer Home-run Which PO...

Which of the following will strengthen signals as they move farther away from the headend through the trunk express system? Answer B) Distribution amplifiers. Which of the following describes a carrier wave? Answer B) A wave with a much higher frequency than the input signal. Which of the following describes modulation? Answer B) The reshaping of a carrier wave to include information contained by an input signal. Which of the following is the symbol for power? Answer W = watts Which ...

NCTI Installer Technician questions with correct answers

In what applications is a splice closure used? Answer Splice closures are used to protect optical fibers and splices against a full range of environmental changes in aerial installations or below ground in vaults. When preparing a fiber-optic cable for splicing, what is the purpose of removing approximately 2.5 cm (1 inch) of jacket and any armor that is present, from the end of the cable? Answer To access the cable's rip cord and to check the cutting depth of the knife or ringing tool wh...

if a customer already has television service and is adding high speed data service, what should be checked on the digital television channels? Answer intermittent operation, which is a symptom of noise interference in the downstream Installing a cable modem and router in a closet or utility room is simplified by having what items in the room? Answer working computer, platform for modem and router, twisted pair network cable with standard configurations what version of the docsis specificat...

Joseph is listening to Brenda, his direct report, talk about her interactions with a difficult client, yesterday. Brenda says, "I know my customer wasn't happy with our product but he really took out his frustration on me. He assumed I was the reason for his discomfort and spent ten minutes berating me to my face with accusations, swearing, intimidating gestures and even threats to try to have me fired. It was terrible." How can Joseph respond to Brenda to practice effective communication? An...

What is the name of the group that established the initial technical standards for the television industry, ensuring a single system would deliver consistent service across the nation? Answer The National Television System Committee (NTSC). What signal modulation technique do cable operators use to transport digital television signals through the cable network? Answer Quadrature amplitude modulation (QAM). What is the major change in enhanced definition TV (EDTV) that improved picture qual...

NCTI Installer Tech questions with correct answers.

What is the network system to which the gateway at the cable modem termination system (CMTS) is connected? Answer The public switched telephone network (PSTN) Which calling feature allows customers to prevent the reception (ringing) of calls from specified telephone numbers? Answer Call block An IP Voice installation requires a specific downstream signal level to work properly. What should the level of the IP Voice downstream carrier be? Answer Between -15 dBmV and +15 dBmV Which of the...

Why do only the outer electrons leave their orbit shells? Answer Only outer electrons leave their orbit shells because electrons farthest from the nucleus are more easily freed from their orbits due to a weaker electrostatic force. What is required to have a balanced (or stable) atom? Answer The number of electrons must equal the number of protons in order to have a balanced atom. List the capacity of each of the first four orbital shells of an atom. Answer Shell: #1 = 2 electrons; #2 = 8 ...

Which concept has enabled Software as a Service (SaaS), Platform as a Service (PaaS), and Networking as a Service (NaaS) offerings? Answer The separation of the transport and connectivity from the applications and services running atop the transport. Which piece of equipment in a VoIP (voice over Internet protocol) phone system routes a call to the public switched telephone network (PSTN) when the receiving location is from outside the Packet Cable managed IP network? Answer Gateway Wha...

Lesson 2 Answer Lesson Two Local Area Network (LAN) Answer Which small network is private to the organization sharing a common communications line linking together devices such as computers, printers, and other peripherals? Media Access Control Address (MAC Answer Which of the following is a unique address that is physically assigned to devices such as a modem or network interface card (NIC) Data Link Layer and physical Layer Answer Which 2 layers of the open systems interconnection (OS...

Which of the following is most typical of a broadband network? Answer Multiple analog channels What components are common to all computer systems? (Check all that apply.) Answer Processor Memory Storage I/O What does I/O stand for? Answer Input / Output A NIC is a device used for: Answer Signaling A sound card is what general type of computer component? Answer Input/output Which of the following is managed by the OS? Answer Keyboard input Screen display File I/O Peripheral c...

What is one reason why broadband cable operators install fiber-optic cable in stages instead of changing the infrastructure all at once? Answer Changing 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? Answer An FTTC is allowed a smaller number of RF amplifiers between the optical fiber and the customer premises. Which type of star topology used in a passive optical ...

The open system interconnection reference model (OSI/R<) Network layer serves which primary function? Answer It uses layer 3 addresses to create multiple routed networks The address 68.56.189.17 belongs to which internet protocol IP class? Answer Class A What happens to a datagram sent by a higher level protocol to a 127.x.y.z address? Answer The datagram loops back inside the host and never leaves the network interface card (NIC) Which device evaluates and acts upon a packet's inte...

What is unique about WDM - PON ? Answer WDM-PON deployed in a greenfield system allows each subscriber to get their own designated wavelength. What is the main benefit of deploying WDM technology? Answer It will increase the capacity of the existing fiber networks tenfold without adding any more fiber. How are optical splitters used in the forward path? Answer As passive branching devices that divide an optical signal across multiple output fibers. What is the purpose of a fiber demarca...