NCTI Field Tech II to III Practice Exam

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• What is the significance of the Fresnel Zone in RF communication?
• When using a passive injector for PoE, what element is primarily added to the transmission?
• Why is consistency in speed and stability critical for the core layer of networks?
• How do you troubleshoot a hidden node?
• Which encryption method is considered the most secure for a wireless network?
• What access point (AP) details are important to specify in a WLAN site survey?
• What would be the total downstream throughput when two QAM channels with 38 Mbps each are bonded?
• During a WLAN site survey for a trade show, what critical information should you gather?
• What is the main difference between fiber-to-the-node (FTTN) and fiber-to-the-curb (FTTC)?
• Which condition occurs when an access point (AP) receives a distant client's signal at a lower power level than that of a nearer client?
• What can be done to increase the coverage area of a wireless local area network (WLAN)?
• What IEEE 802.11 standard specifies both spread spectrum RF and infrared (IR) transmission technologies?
• After fixing a premises wiring issue, what is the next step a technician should take?
• How does a client find a wireless local area network (WLAN) during passive scanning?
• What technology operates on the 2.4-GHz band and runs at 54 Mbps?
• When one phone has a dial tone, but two phones do not, what is the most likely cause?
• What are effective measures to prevent high voltage standing wave ratios (VSWR) in equipment?
• Given an access point with 100 mW of output power and 3 dB loss, what is the EIRP from an antenna with 10 dBi gain?
• Why is it crucial to know the management of user connections in a WLAN?
• Which power management mode creates a traffic indication map (TIM) in a basic or extended service set?
• In what manner do radio waves propagate away from the source?
• Calculate (20) / (-4) + (-2) x (-10) - (-2) x (7):
• Which frequency bands do all 802.11 standards use?
• Which part of a fiber-optic system is crucial for connecting multiple fibers in a network?
• Why should all data from a WLAN site survey be included in a report?
• What should be noted if a semidirectional antenna is used during a WLAN site survey?
• What is the result of the expression 15 - (6 + 4) × 2?
• How should a digital multimeter (DMM) be used to troubleshoot problems in telephone wiring?
• When asking a customer whether a problem is intermittent or constant, which troubleshooting step are you taking?
• Which wireless standard operates in the 5 gigahertz (GHz) frequency band?
• What types of spread spectrum technology does the FCC specify in the Codes of Federal Regulation?
• What is the evaluation of the expression 5(4 + 6) - 3?
• What is one reason spread spectrum technology is employed in Bluetooth wireless personal area networks?
• Which of the following best describes ad hoc networks?
• Which interframe space provides the highest priority for network function control?
• What is the square root of 81?
• In a passive optical network, what role do optical splitters have?
• Which IEEE 802.11 standard was the first to utilize OFDM?
• What should be monitored to ensure optimal WLAN performance?
• In what way does a WLAN service set differ from other network descriptions?
• What is the metric prefix for 10 to the power of -3?
• What is the best task for troubleshooting the near/far problem?
• What does -49 divided by -7 equal?
• Which statement about Bluetooth technology is true?
• What is one key disadvantage of using WEP for wireless security?
• Which phenomenon occurs when a wave bounces off a surface?
• What should you inquire about a customer's setup before conducting a site survey?
• How does filtering help improve the security of Wireless Equivalent Privacy (WEP) in a WLAN?
• What is the standard encryption method used with WPA2?
• Why do broadband cable operators opt to install fiber-optic cable in stages?
• If x = 4, what is the value of 2x + 3?
• What is the main purpose of impedance-matched hardware in RF systems?
• What instrument is used to locate and measure interfering narrowband RF signals in an IEEE 802.11 WLAN?
• What can be learned by asking the customer to demonstrate a problem during troubleshooting?
• What is the benefit of isolating various network elements after analyzing a DTV service problem?
• How does radio frequency line-of-sight (RF LOS) differ from visual LOS?
• What unit is commonly used to express the gain of an antenna?
• What are the three main conditions that influence the range of a wireless local area network (WLAN)?
• According to FCC rules, what is the maximum output to the intentional radiator (IR) for frequency-hopping spread spectrum with a 5 MHz bandwidth?
• During which phase of the troubleshooting process is QAM channel measurement typically conducted?
• To enhance wireless network security, what is a practical step regarding passwords?
• How is silver satin cable typically pinned when connecting telephone equipment to wall outlets?
• To build a wireless network with significantly better throughput than a single IEEE 802.11b access point, what solution would be acceptable?
• Which method is effective for controlling expectations?
• What is the main purpose of using a digital signal analyzer in a DOCSIS network?
• What is one benefit of using shorter packet fragments when transmitting data?
• What is the typical coverage pattern of a semidirectional antenna?
• What type of antenna might greatly improve performance in a crowded urban environment?
• What is the main function of the IEEE 802.11 WLAN superframe?
• What does a WLAN service set describe?
• What is WPS used for in relation to Wi-Fi networks?
• What aspect of radio waves allows for their movement through different media?
• What can be verified on the set-top box (STB) diagnostic page when troubleshooting an authorization issue?
• What primary advantage does a WLAN provide over traditional wired connections?
• Which methods are commonly used to configure and manage access points (AP)?
• Which encryption methods must access points support to comply with IEEE 802.11i security standards?
• Why have 900 megahertz (MHz) Industrial, Scientific, and Medical (ISM) band wireless local area networks (WLAN) lost favor compared to 2.4 gigahertz (GHz) and 5 GHz frequency systems?
• Which layers of the OSI reference model are specifically applied between DOCSIS modems and the cable modem termination system (CMTS)?
• When establishing maximum security, on what should WLAN user authentication be based?
• Why is it recommended to place wireless access points on switches rather than hubs?
• What capability was introduced in DOCSIS 3.0 to enhance upstream bandwidth?
• In what role might a WLAN be used within a distribution layer?
• The formula for calculating the area of a circle is?
• What primary issue does a WLAN address for both corporations and home users?
• What is the term for the ratio of the chipping code to data bits in a direct sequence spread spectrum (DSSS) signal?
• What is the critical requirement for clients and access points (AP) when connecting to a wireless local area network (WLAN)?
• How does an increase in effective isotropic radiated power (EIRP) relate to the link budget range?
• What advantage does radio frequency over glass (RFoG) provide for broadband cable operators?
• What role do interframe spaces play in an IEEE 802.11 WLAN?
• What is the square of 7?
• What device would a WLAN administrator install to maximize bandwidth for indoor LAN users?
• What is a primary function of a bandwidth control unit (BCU)?
• Which wireless local area network (WLAN) device is described as a half-duplex device with intelligence equivalent to that of a sophisticated Ethernet switch?
• What power over Ethernet (PoE) device uses the injected DC voltage from the injector?
• What type of telephone construction is more likely to be affected by polarity reversal issues?
• Why is it important to take notes at each job location?
• Why is it recommended to change the service set identifier (SSID) from the device default when configuring a wireless router?
• Which method of managing wireless access points is considered secure?
• After completing a WLAN site survey, what is the recommended next step?
• What does GPON stand for?
• Which quality is essential for successful troubleshooting?
• Which wireless standard is noted for better performance at longer ranges and improved throughput?
• What causes co-channel interference in a wireless local area network (WLAN)?
• What may cause some DTMF telephones to have a continuous dial tone while others do not?
• What is the maximum allowable power output for IEEE 802.11a-, 802.11n-, and 802.11ac-compliant devices operating on the lower U-NII radio band?
• What is the largest data frame size in bytes that can traverse a WLAN without fragmentation?
• What is needed to achieve efficient RF communication?
• What is one effect of poor signal-to-noise ratio (SNR) on QAM channels?
• During passive scanning, how does a client recognize which SSID it should connect to?
• Which tool would you typically not use when conducting a WLAN site survey?
• What feature in an enterprise wireless gateway allows for quickly assigning network access rights to individuals within the same workgroup?
• What risk is associated with shared key authentication in WLANs?
• What security service allows an administrator to assign service levels to a specific user in an enterprise wireless gateway?
• What term is used to describe a situation in UTP cable where a conductor contacts a grounded conductor?
• What is the product of 8.13 and 0.123?
• What type of reasoning applies a general statement to a new situation?
• In what scenario is a wireless workgroup bridge most useful?
• To break a cycle of negative self-talk, what is a suggested approach?
• Which component is essential for a passive optical network (PON)?
• How many channels are available with IEEE 802.11g?
• What troubleshooting step involves checking if the resolution introduced new problems?
• What does confirming splitter output levels before connecting outputs achieve when replacing splitters?
• Which of the following networks or products utilize spread spectrum technologies?
• When should the RTS/CTS protocol be enabled in a WLAN?
• What is an important factor to consider when selecting an antenna for a specific application?
• What causes the hidden node problem in a wireless local area network (WLAN)?
• How does spread spectrum technology mitigate the risk of signal jamming?
• What antenna type is ideal for a point-to-point network connection between two office buildings?
• What does the "on with threshold" setting in RTS/CTS control?
• What is the result of 4/7 multiplied by 9 4/11?
• What is the value of (7 x 7) + (5 x 6)?
• Bluetooth is associated with which Institute of Electrical and Electronics Engineers (IEEE) standard?
• In RF telecommunications, what does 'signal integrity' refer to?
• What is the Federal Communications Commission (FCC) regulation for the maximum equivalent isotropically radiated power (EIRP) from a point-to-multipoint (P2P) wireless local area network (WLAN) antenna?
• Why might "authenticated" steps not often be seen by WLAN administrators on an access point (AP)?
• What aspects make a hospital WLAN an effective training environment for technology immersion?
• What is the purpose of the distributed coordination function (DCF) in a WLAN?
• Which type of network access does Class of Service (CoS) relate to when assigning user levels in a wireless network?
• What challenge do Wireless Internet Service Providers (WISP) face in "last mile data delivery" to customers?
• What generally characterizes the data throughput over the return path in a DOCSIS network?
• What is a method to confirm the presence of a hidden node on the network?
• Which organization regulates the use of wireless local area network (WLAN) devices in the United States?
• Which statement represents a true axiom regarding equality?
• What is the result of the calculation (-25) + (42) + (-62) + (20)?
• What is a consideration when mounting a high-gain omnidirectional antenna indoors on the ceiling?
• When should heat shrink tubing be installed on the fiber?
• What is the main difference in wiring configurations for an 8P8C modular plug according to USOC and ANSI/TIA/EIA 570-B?
• Which statement describes a passive injector?
• What is the value of (9 ÷ 3) + (4 × 2)?
• How does IP multicast traffic differ from IP broadcast traffic?
• What is a major consideration when planning wireless coverage in large facilities?
• What behavioral symptom may indicate stress overload?
• What must all WLAN access points and clients have to establish a connection?
• Which voltage standing wave ratio (VSWR) is best for transferring radio frequency (RF) energy?
• Why is data throughput over the return path typically lower than the forward path in a DOCSIS network?
• What is the result of (60 + 40) / (5)?
• What is the term for the bending of a wave as it passes through a medium of different density?
• Which step in the troubleshooting process involves discussion with the customer?
• What capability was added to residential gateways to connect with IEEE 802.11 compliant devices?
• What is the result of (480 x 10 to the power of -5) divided by (60 x 10 to the power of -3)?
• What is the potential outcome of a ground fault in UTP cabling?
• What is a man-in-the-middle attack in a WLAN context?
• What type of device is a wireless bridge in terms of duplex capability?
• What is a primary advantage of having a Role-Based Access Control (RBAC) system in an enterprise network?
• What happens when an active Ethernet switch fails to sense a power over Ethernet (PoE) device on a port?
• Polarization in antennas is defined as what?
• What does the installation of fiber-to-the-curb (FTTC) primarily reduce?
• Which test is essential during a WLAN site survey to assess user experience?
• What type of attack could jeopardize an employee's job by linking network activities directly back to that employee?
• Why have enterprise companies found it cost-effective to integrate WLAN segments into their networks?
• Why is it beneficial for a wireless network administrator to install an enterprise wireless gateway?
• What is another term for an independent basic service set (IBSS)?
• What does the addition of low-density parity-check (LDPC) in DOCSIS 3.1 mostly enhance?
• What is the value of the expression 3^2 x 2?
• What is the result of (250 x 10 to the power of -6) - (7 x 10 to the power of -5)?
• How are optical splitters utilized in the forward path?
• What mode is used when several computers are sharing files without a wireless access point?
• In a frequency-hopping spread spectrum (FHSS) system, what occurs if narrowband interference affects one of the frequencies?
• What must a technician keep in mind when approaching a digital TV (DTV) service issue?
• What action is typically indicative of a passive attack in a WLAN environment?
• What technologies do the IEEE 802.11n wireless standard utilize to achieve high data rates?
• Which mode uses a wireless access point (WAP) connected to a wired network?
• What describes a wireless system with an access point that does not transmit the WLAN's SSID in beacon frames?
• What is the minimum modulation error ratio (MER) required into the cable modem for a 256-QAM carrier in a DOCSIS network?
• What is the last step of the basic wireless access point (WAP) setup?
• What is the product of (17) x (-19)?
• Which component of frequency hopping spread spectrum (FHSS) systems creates more overhead compared to a similar component in direct sequence spread spectrum (DSSS) systems?
• What adjustment is made to analog TV channels to maintain equal power in a mixed modulation network?
• Which statement describes the essence of protocol filtering in a wireless bridge?
• What is a fiber pigtail?
• How can a WLAN administrator ensure compliance with security audits?
• What does being "active" as a critical thinker entail?
• What characteristic defines an access point in terms of device intelligence?
• What is a common deployment method for WLANs in large office buildings?
• How is stereotyped thinking best described?
• What is the typical length of an initialization vector (IV) used in weak implementations of the Wireless Equivalency Protocol (WEP)?
• What is one advantage of using wireless local area networks in office environments?
• What is 7 3/8 divided by 7 1/4?
• Which of the following best describes the role of an SSID in a wireless network?
• What does a signal-to-noise ratio (SNR) near or below 30 dB indicate in a QAM channel?
• If x = 3, what is the value of the expression 2x + 7?
• What should a technician check first when a customer reports a no dial tone (NDT) issue after new carpeting has been installed?
• In what direction does an omnidirectional antenna radiate RF energy?
• What does Equivalent Isotropically Radiated Power (EIRP) refer to?
• What does a break in a conductor typically affect in a telephone system?
• In a bus topology with telephone wiring, what is the quickest method to locate a wiring error when a tester indicates a problem?
• Which PON element is responsible for using patch panels?
• What operation mode does a basic service set (BSS) use?
• What characteristics should an access point (AP) have for effective WLAN site surveys?
• Which component of a PON utilizes a Bragg grating filter?
• Which type of STB functions similarly to DOCSIS cable modems?
• Why are WLANs typically deployed in an access capacity rather than as the core layer of a network?
• What is the sum of 3 6/9 + 6 1/3 + 9 5/9?
• What wiring issue may lead to some DTMF phones working improperly?
• Which two features in DOCSIS 3.1 help extend the lifespan of HFC networks?
• What informs a mobile wireless device of an available Wi-Fi network as it enters a hotspot?
• Which DTV trouble call could be avoided with better customer education?
• Which of the following describes the connectivity level of wireless bridges according to the OSI model?
• Which type of wireless client device requires drivers to be installed on the client node?
• What might indicate that a telephone line has a grounding issue?
• Why is direct sequence spread spectrum (DSSS) the most commonly used type of spread spectrum?
• Which type of antenna is best for broadcasting signals in an even fashion across a wide area?
• If E = IR, what is the formula to find I?
• In a segmented WLAN, how do mobile clients maintain connectivity when roaming?
• What is the primary reason shared key authentication is viewed as insecure?
• Which layer is utilized by the CMTS to differentiate between cable modems in a DOCSIS framework?
• On what basis do WLANs that utilize IEEE 802.1x protocol manage network access?
• What is the maximum range of Class 2, 2.5 milliwatt (mW) Bluetooth devices?
• What is the result of dividing 0.5349 by 0.1420?
• What is the likely outcome of taking control of your expectations in a problem-solving context?
• How wide is each of the three WLAN Unlicensed National Information Infrastructure (U-NII) bands?
• What protocol is primarily used to secure user authentication in modern WLANs?
• In which OSI model layer do wireless local area networks (LAN) operate?
• What type of connectivity is needed for linking networks between two buildings across a street?
• How are IEEE 802.11ac devices able to maintain compatibility with earlier standards that operate in the 2.4 GHz ISM radio bands?
• What type of star topology in a PON puts splitters closer to customer premises?
• How can a laptop, tablet, or cell phone be utilized during a WLAN site survey?
• Which component performs the function of signal transitioning in a network?
• What should technicians check as a potential source of hum on a customer's telephone line?
• What is an important factor to determine during a WLAN site survey regarding security?
• 0.00004 can be expressed as which of the following in scientific notation?
• What spread spectrum technology does Bluetooth use?
• In a radio frequency circuit, what is the intentional radiator's (IR) power level if the antenna receives a signal at 75 mW and transmits at 150 mW?
• What is the result of (75 x 10 to the power of 3) + (25 x 10 to the power of 4)?
• What is the channel width for direct sequence spread spectrum (DSSS) and how far apart are their center frequencies spaced?
• What is the solution to the expression (75 × 103) + (25 × 104)?