AT&T Technical Knowledge (TKT) II Practice Test

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• Which of the following represents a digital state?
• What does load balancing do in networking?
• Except for a brief period immediately after voltage is applied, what can be said about capacitors?
• A device used to compensate for variations in speed between two different devices is a ________.
• Identify the layers of the OSI model.
• How many kilobytes are in 1 KB based on the binary system?
• Which statement best describes RAM (random access memory)?
• What protocol is commonly used for secure data transmission on the internet?
• What is the role of an Access Point (AP) in a wireless network?
• What is the term for an electrical signal that has only two states?
• In which context would you encounter the term "capacitance"?
• What does “V” typically represent in electrical equations?
• What does capacitance measure in an electrical circuit?
• Which unit measures electrical power?
• What does the impedance of an AC circuit represent?
• What is a function of a multi-meter?
• Which circuit type allows the current to follow multiple pathways?
• What is the primary role of firewalls in network security?
• Electrons will always move toward the more __________ charge.
• What can cause an IP address conflict?
• A volt is a measure of what?
• What is a VLAN used for in networking?
• If a coil across a 500 cycle generator has an inductive reactance of 30 ohms, what will be the inductive reactance when the frequency is increased to 1000 cycles?
• In which scenario would you expect the current voltage to be out of phase with a certain degree?
• What does SIP stand for in VoIP communications?
• To communicate between all its elements, a computer utilizes__________.
• As frequency of signals increases, what happens to the measured loss?
• If an electrical doorbell has a resistance of 70 ohms and requires a current of 2 amps, what is the necessary voltage to operate the bell?
• How does a primary cell differ from a secondary cell?
• What is the term for the amount of magnetism left in an electromagnet after the current has been removed?
• How do you determine the current in a circuit when you know the voltage and resistance?
• What does SSID stand for in wireless networking?
• A multi-meter should offer maximum or minimum resistance when measuring?
• Define "latency" in the context of VoIP.
• What is a part of a computer system designed to block unauthorized access?
• The resistance in a series circuit is equal to what?
• Which statement about capacitors is true?
• What is an endpoint in networking?
• What shape in a flow chart represents a decision?
• What does increasing frequency generally do to the transmission line’s performance in terms of loss?
• Describe the purpose of DHCP in a network.
• Which of the following is a primary function of a router?
• As the resistance of a material increases, what happens to its conductance?
• In a circuit with resistance and capacitance, if voltage is held constant, how does increasing capacitance affect circuit behavior?
• What will generally happen when a smaller gauge wire is used for transmission?
• What does QoS stand for and why is it important?
• What is the primary function of a firewall in a network?
• As the current passing through a conductor increases, what happens to the magnetic flux surrounding the wire?
• A byte is defined as?
• What is the primary function of an Access Point in networking?
• What kind of circuit features a break in the current path?
• What is the total inductance if two inductive coils with inductances of 30 H and 20 H are connected in series?
• Which of the following is a benefit of using fiber optic cables over copper cables?
• Which of the following is a common type of physical network topology?
• What type of encryption does WPA2 provide?
• What is a critical function of network monitoring tools?
• In a closed circuit, what is the primary function of the power source?
• In a capacitor, what role does the dielectric material play?
• What type of circuit is defined by a complete path for current to flow?
• If a series circuit contains a pure inductance with a reactance of 200 ohms, a resistor of 1 k ohm, and a capacitor with a reactance of 250 ohms, what is the total impedance?
• What type of data transmission allows for simultaneous flow of data in both directions?
• Which symbol in a flowchart represents an action or process?
• In a parallel circuit, what is true about the voltage?
• What is the primary function of an IP address?
• What is the typical frequency range for Wi-Fi?
• A resonant AC circuit offers what type of impedance to current flow?
• What does base current cause in a transistor?
• If the AC voltage reaches its positive maximum while the current reaches 0, what is the phase relationship between voltage and current?
• In an inductive circuit, what effect does increasing the frequency have on the reactance?
• Which of the following is a common vulnerability in wireless networks?
• Why is the OSI model important in networking?
• Capacitive reactance in an AC circuit generally behaves how with respect to frequency?
• What does a rectangle on a flow chart typically indicate?
• In networking, what does the term "bandwidth" refer to?
• What is the significance of firmware in network devices?
• Which safety device is activated when the current exceeds a specified level?
• What formula represents Ohm's Law?
• What is the total inductance when two coils of 60 and 80 microhenries are connected in series without mutual coupling?
• Why is network redundancy important?
• In an AC current, if the power factor = 0.5, what is the relationship between true power and apparent power?
• In networking, what does the term "throughput" refer to?
• How does a VLAN improve network efficiency?
• What role does the Transport layer play in the OSI model?
• Mutual inductance in a coil is caused by what phenomenon?
• In the context of network security, what does a firewall do?
• In a parallel circuit with 4 branches, each having a 100 ohm resistor, what is the total resistance?
• What is typically the main purpose of creating a closed circuit in electrical systems?
• According to Ohm's Law, how is voltage calculated?
• What is the value of 1 micro Henry in henries?
• What does the acronym VoLTE stand for?
• In an RCL circuit, what is the phase difference between voltage and current compared to?
• Which layer of the OSI model is responsible for the end-to-end communication?
• What is subnetting?
• What does the acronym VPN stand for?
• Using Ohm's Law, how can you calculate Amps if you are given Volts and Resistance?
• What type of current is indicative of a charge flow that does not reverse direction?
• What happens to capacitive reactance when the frequency of the applied voltage increases?
• How many farads are in 200 micro farads?
• What is the main advantage of fiber-optic cables over copper cables?
• What role does an intrusion detection system (IDS) serve in a network?
• What happens to the total resistance when resistors are added in series?
• What is one of the primary benefits of having a closed circuit?
• Inductance is a quality of a circuit that opposes any changes in __________.
• Resistors of 10, 15, and 6 ohms are connected in parallel. What is the total resistance?
• What is the unit for measuring electrical current?
• What is the primary purpose of using a router in a network?
• When an inductor is connected in a circuit, what type of current does it resist?
• How does an SSL certificate enhance web security?
• What is the primary function of ROM (read-only memory)?
• What does network latency refer to?
• What is the measure of the opposition to current flow in a circuit?
• What does the term "ping" indicate in networking?
• What is the base unit of charge?
• What voltage is observed across all resistors when 3 unequal resistors are connected in parallel across a 120 volt line?
• What are the two materials most commonly used in the manufacture of transistors?
• What is the lowest layer of the OSI model called?
• If the space between capacitor plates is doubled, how will the capacity change?
• In terms of data transmission, what does "full duplex" refer to?
• What are the three leads on a transistor?
• What is the conversion of 33 milli amps to amps?
• What is generally the result of increasing loss in a circuit?
• If you multiply Volts and Amps, what is the result?
• The power factor in an AC circuit is a measure of what?
• What is the role of resistors in a circuit?
• What determines the DC resistance of a conductor?
• Which component primarily stores electrical energy in an electric field?
• What can be used to visualize network traffic and identify bottlenecks?
• What is observed when a capacitor is charged with DC voltage?
• What type of circuit would you have if the current path is interrupted?
• What is the direction that electric currents typically flow?
• Software includes_________.
• In the context of electricity, what does an increase in phase angle typically indicate?
• If you have Watts and Volts, how do you calculate Amps?
• What is the reactance of a capacitor of .005 farads at a frequency of 1000 Hz?
• Which protocol is commonly used for secure communication over the internet?
• Explain the difference between symmetric and asymmetric encryption.
• What is network topology?
• Which type of circuit allows electricity to flow completely?
• The AC voltage across a pure inductance is said to __________.
• What does NAT stand for in networking?
• If a certain transmission medium has high measured loss, what effect will this have on data integrity?
• How many time constants are required to charge a capacitor to 100 percent of the source voltage?
• In a flow chart, what does a circle indicate?
• What is the primary characteristic of an open circuit?
• What happens to current flow when a circuit is closed?
• The abbreviation for amperes is what?
• A nibble is __________.
• A capacitor opposes any change in __________.
• What happens to the capacitance of a capacitor as the surface area of its plates increases?
• How can network segmentation enhance security?
• What is important to follow when ensuring safety around electrical equipment?
• Which protocol is commonly used for email communication?
• Name a common type of malware that can affect networks.
• Which of the following is a database application?
• In relation to resistance, what does conductance measure?
• What is the main goal of using network segmentation?
• What does the acronym SIM stand for in telecommunications?
• What is the primary function of a switch in a local area network?
• What is the correct formula to calculate resistance using current and voltage?
• Which layer of the OSI model directly interacts with physical transmission media?
• What is the term for the difference in electrical potential energy between two points in a circuit?
• What is a common cause of network congestion?
• How can you find Volts from Watts and Amps?
• What does the term "latency" refer to in a network?
• How do you convert 6500 ohms to kilohms?
• In a DC circuit, what happens to the resistance when the temperature increases?
• What is the importance of software updates in network devices?
• What is the standard unit for measuring inductance?
• Which device is utilized to provide a gain in a circuit?
• What does the acronym TDM refer to in telecommunications?
• Which element best describes the function of a capacitor in a circuit?
• Name a method for securing a Wi-Fi network.
• What happens to the inductive reactance when the frequency of an alternating current increases?
• What is an example of a physical network attack?
• Which device typically acts as a central connection point in a star network topology?
• What is the maximum length for a standard Ethernet cable?
• What term describes the transmission method where data is sent in bursts rather than continuously?
• A Bit is defined as?
• What principle is described by "least privilege" in network security?
• What occurs to the capacitance when the distance between capacitor plates is increased?
• What does QoS stand for in telecommunications?
• What is the primary benefit of using Quality of Service (QoS) in a network?
• What device is used to increase the measured loss in a circuit?
• What is the term for a flow of electric charge that regularly reverses its direction?
• What is the time constant for a resistor of 5 mega ohms placed in series with a capacitor of 0.005 micro farads?
• What device converts AC to pulsating DC?
• How does a VPN enhance security for remote workers?
• What is the role of DHCP in networking?
• If data is sent in serial form, you would expect________.
• What term describes the ability of a device to store electrical energy?
• What is the function of the base station in a mobile network?
• Which unit is used to measure capacitance?
• What is the purpose of a firewall in a network?
• Which type of access point can operate independently in a wireless network?
• What is the primary function of the DNS?
• When the applied frequency is increased in a circuit containing an inductor and a capacitor, what happens to inductive reactance?
• What type of cable is commonly used for high-speed data transmission in networking?
• What technology allows multiple signals to be sent simultaneously over a single transmission medium?
• What type of circuit is characterized by a continuous path for current to flow?
• In the equation P = (I x I) R, what does P represent?