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WGU D337 Objective Assessment Midterm Exam (New 2026/ 2027) Internet of Things (IoT) and Infrastructure Quiz Bank| Questions and Verified Answers| 100% Correct| A Grade

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WGU D337 Objective Assessment Midterm Exam (New 2026/ 2027) Internet of Things (IoT) and Infrastructure Quiz Bank| Questions and Verified Answers| 100% Correct| A Grade Q. What is the internet of things? ANSWERS IoT is a system of sensors connected with communication modules to provide knowledge. Q. What is the concept of internet of things? ANSWERS the idea that everything / every device could be given an ip address and put on the internet. Ex. using your phone to turn on your microwave Q. What are the three components of Internet of Things ? ANSWERS Sensor nodes Communication module Data analytics component Q. what is a sensor? ANSWERS A sensor is a converter that measures a physical quantity and converts it into a electrical signal Q. What are 5 examples of wireless communication standards? ANSWERS Satellite Wireless USB/ Ultrawideband Wifi Wimax Bluetooth 3G NFC ZigBee GSM Q. What are the three levels of data analytics? ANSWERS data, knowledge, and feedback. Q. *What are the design goals of the internet of things? ANSWERS Mobility Wireless Robustness Intelligence Energy efficiency Q. what is a micro-controller? ANSWERS A small integrated circuit that can be programmed in a variety of different computer languages. Q. What does GPIO stand for? ANSWERS General Purpose Input/Output Q. What does IDE stand for? ANSWERS Integrated development environment; application with tools that are necessary for developing software Q. Before your program "code" can be sent to the board, it needs to be converted into instructions that the board understands. This process is called _______________. ANSWERS compiling Q. What is the code must be included in order to read the analog voltage from the potentiometer? ANSWERS int sensorValue = analogRead(A0); Q. What is the meaning of the code Sln(voltage) ? ANSWERS This code prints the voltage to the serial window Q. What are 3 different types of sensors? ANSWERS resistive sensors inductive sensors capacitive sensors Q. What is right about resistive transducer? ANSWERS From measuring resistance, we can measure the non-electrical parameters Q. What is a stepper motor? ANSWERS A stepper motor is a very precise motor that you can instruct to rotate one step at a time. They are used in CNC machines, 3D printers and in robotics Q. What is the line of code controlling the speed of the stepper motor? ANSWERS delay(3); Q. What are the applications of stepper motors? ANSWERS Industrial Machines Security Medical Consumer Electronics Q. How are stepper motors used in Industrial Machines? ANSWERS - Stepper motors are used in automotive gauges and machine tooling automated production equipments. Q. How are stepper motors used in Security? ANSWERS - new surveillance products for the security industry. Q. How are stepper motors used in Medicine? ANSWERS - Stepper motors are used inside medical scanners, samplers, and also found inside digital dental photography, fluid pumps, respirators and blood analysis machinery. Q. How are stepper motors used in Consumer Electronics? ANSWERS - Stepper motors in cameras for automatic digital camera focus and zoom functions. Q. What is the code must be included in order to read the analog voltage from the potentiometer? ANSWERS int sensorValue = analogRead(A0); Q. What is the meaning of the code Sln(voltage) ? ANSWERS This code prints the voltage to the serial window Q. What is right about resistive transducer? ANSWERS From measuring resistance, we can measure the non-electrical parameters Q. what are the components on an arduino board? ANSWERS USB jack Resettable fuse 5-volt low dropout regulator DC power jack 3.3 volt low dropout regulater Power pins Analog I/O pins Atmel ATmega 328 In-circuit serial programming header reset power led digital I/O pins pin D13 LED Tx/Rx LEDs USB to serial IC Q. What is the goal of the blink program? ANSWERS To blink the led Q. what is the goal of the serial port option in tools? ANSWERS To select the usb port that your arduino is plugged into Q. what is a potentiometer? ANSWERS The potentiometer can be used as a voltage divider to obtain a manually adjustable output voltage at the slider(wiper) from a fixed input voltage applied across the two ends of the potentiometer. This is their most common use. Q. what is the Ultrasonic Ranger? ANSWERS - uses ultrasonic waves to determine the distance between sensor and object based on time between emission of wave and echo of it. Q. Internet of Things (IoT) ANSWERS Connecting physical objects (e.g., highways, pacemakers, factories) to the Internet via wired and wireless networks. Q. Data Generation ANSWERS IoT generates massive volumes of data in real-time, providing actionable insights and intelligent actions. Q. Applications of IoT ANSWERS IoT is used in future cities, transport, health care, manufacturing, and agriculture. Q. Evolution of IoT ANSWERS From RFID technology to sensor development, communication technologies, and now focusing on data collection, processing, and security. Q. IoT Ecosystem ANSWERS Involves sensor providers, connectivity providers, information providers, application developers, analytics service providers, platform providers, and end users. Q. Information Providers ANSWERS Often sensor owners who may share data commercially, to meet obligations, or for the general good. Platform Providers Enable the ecosystem by providing functionalities that support other stakeholders. Application Developers Create applications that use available data to provide actionable insights. End Users Benefit from the information and applications provided by other stakeholders; can be private individuals or institutional decision-makers. Analogy of IoT Devices IoT devices are like human senses, detecting stimuli and sending data to be processed, similar to how the brain processes sensory inputs. Edge Processing Local processing of data on devices. Distributed System Unlike humans, IoT systems are typically distributed. Types of IoT Applications Monitor and respond to time-sensitive conditions or collect long-term data for analysis. Generic Solutions Advantageous to build applications where generic problems have been solved and robust solutions are available. Scalability and Sharing IoT needs to work at a large scale with the potential to share information widely. Network Access Technologies Support IoT device connectivity, moving data to/from sensors via backhaul networks. Variety of Devices No single technology fits all scenarios; choice depends on data rate, power availability, range, and cost. WPAN Short-range, high data rate (e.g., Bluetooth, ZigBee). WLAN Mid-range, high data rate (e.g., Wi-Fi). LP-WANs Long-range, low data rate, energy-efficient. Cellular Networks Long-range, flexible data rates. Low-Power Wide Area Network (LPWAN) Licensed vs. unlicensed, lower frequencies for long-range. Power Consumption in LPWAN Asynchronous protocols for extended battery life. Data Rate in LPWAN Lower rates increase range. Spread Spectrum vs. Ultra-Narrow Band Techniques to manage spectrum use and noise. LoRaWAN Spread spectrum, asynchronous, multiple device classes. Sigfox Narrowband, low data rate, uses frequency hopping. Weightless Three protocols (Weightless-W, Weightless-N, Weightless-P). EC-GSM IoT-optimized GSM. NB-IoT Narrowband, low power consumption, high system capacity. LTE-M Higher throughput, supports voice calls, backward-compatible with LTE networks. eSIM Embedded SIM for improved reliability and security. NFV Network Function Virtualization for flexible network capabilities. Network Slicing Logical networks for different use cases. Enhanced Mobile Broadband (eMBB) High data rates for applications like VR and gaming. Ultra-Reliable Low-Latency Communications (URLLC) For critical applications like remote surgery. Massive Machine Type Communications (mMTC) Dense device deployments, long battery life. IoT Access Network Technologies Developed to support various IoT requirements. Selection Criteria for IoT Based on quality of service, price, power, range, and data volume considerations. Cloud Computing Cost-effective storage and processing by services like Amazon, Google, and Azure. Edge Computing Data processing near IoT devices, reducing latency, complexity, and network load. Virtual Network Functions (VNFs) Virtualized network services hosted on edge computing devices. IoT Devices Sensors and actuators installed near the data source. Customer Edge Device Local storage, processing, and networking for IoT devices. Mobile Edge Compute (MEC) Servers reducing transmission costs, providing fast responses. Centralized IoT Platform Central storage and processing, supporting data interoperability and management. Customer Premises Edge Compute (C-PEC) Low-latency, dedicated devices at customer locations. Communication Service Provider Premises Edge Compute (CSP-PEC) Low-latency cloud services near sensors, for high compute workloads. LAN Wi-Fi, Ethernet, Bluetooth, ZigBee, CAN bus, GPIO. WAN 3-5G cellular, xDSL, LORA, NFV, SDN. Processors X86, ARM, GPUs, neural network processors. Operating Systems Linux variants, security-hardened OS. Containers Lightweight virtualization for IoT applications. Container Management Tools like Kubernetes, Docker Swarm. IoT Runtime Environment (IRE) Components: Protocol adapters, customer apps, information brokers, rule engines. Device Management Functions: Initial configuration, remote access, monitoring, and maintenance. Secure Runtime Environment (SRE) Security Measures: IAM, secure boot, TPMs, TEEs, trusted containers and VMs. Starter Configuration Devices like Raspberry Pi 3, suitable for development and experimentation. Developer Tools Languages like Python, NodeJS, Node-RED. Azure IoT Edge Edge agent, hub. AWS Greengrass Serverless Lambda framework. EdgeX Foundry Open-source, cloud-independent. Intel's Secure Device Onboarding (SDO) Automated, secure device registration. Zero-touch Device Onboarding (ZDO) Secure, automatic configuration and attestation. Use Cases Smart edge cameras, industry, and retail applications for monitoring, analytics, and automation. Data Revolution Significant increase in data volume and types, transforming society and supporting the UN Sustainable Development Goals. IoT (Internet of Things) Network of physical devices collecting and exchanging data via sensors and connectivity. IoT Platform System supporting the collection, management, and use of data from IoT devices. Access Controls Mechanisms managing who can view or use data on an IoT platform. Data Silos Isolated data sets not easily accessible or shareable across different systems. Metadata Data providing information about other data, including definitions, units, accuracy, and usage restrictions. Provenance Information about the origins and history of the data. Data Resilience Ability of an application to handle missing, incomplete, or inaccurate data. Aggregator IoT platform collecting and managing data from various sources. Catalogue Directory of available data sets and their metadata aiding in data discovery. HyperCat Specification for representing and exposing IoT platform catalogues in a machine-readable format. DCAT (Data Catalog Vocabulary) W3C recommendation for representing data catalogues, primarily for government data. Authentication Verifying the identity of a user or system. Authorization Granting permission to access data or perform actions. GDPR (General Data Protection Regulation) European regulation governing the use and protection of personal data. Edge Adapters Software converting data from its native format to a standardized format for IoT platform use. EEML (Extended Environments Markup Language) Format for representing sensor data. CAP (Common Alerting Protocol) Format for representing emergency alerts and situations. NGSI (Next Generation Service Interfaces) Specifications for context information management in IoT. Interoperability Essential for maximizing the value of IoT data, enabling innovation, and improving efficiency. Balance of Effort Different approaches distribute the effort between information providers, consumers, and platform operators. Future Directions Emphasis on semantic technologies and linked data to enhance data integration and interoperability. BT Datahub Defines common formats for different types of data (sensor data, situations, geographical features, journeys). PETRAS IoT Observatory Emphasizes security and minimal effort for data providers. CityVerve API Entity-based approach providing a consistent structure. FIWARE Orion Context Broker Implements a publish/subscribe model. NGSI-9 and NGSI-10 Interfaces for entity discovery and information exchange. Remote Health Monitoring Enables monitoring of patients outside of traditional healthcare settings. Alarm Fatigue Condition where healthcare professionals become desensitized to alarms due to excessive false alarms. Wearable Devices Technologies that facilitate remote patient monitoring and track vital signs. Environmental Sensors Stationary sensors that monitor factors impacting patient health. Electronic Health Records (EHRs) Digital version of patients' paper charts, integrating IoT data remains challenging. 5G Networks Technological advancement driving IoT investment in healthcare. Chronic Disease Management Use of IoT technology to manage long-term health conditions. BigEHR Federated repository design for integrating various health data sources into a unified system for research and patient care. Federated Architecture System design that allows autonomous and decentralized data sharing and communication. Telemedicine Remote monitoring and treatment of patients using telecommunications technology. Wearables Electronic devices worn on the body to monitor health and fitness metrics. EHR (Electronic Health Record) Digital version of a patient's paper chart, including medical history, diagnoses, medications, treatment plans, and test results. openEHR Open standard specification for electronic health records focusing on semantic interoperability. Pseudonymization Data processing technique where identifying information is replaced with pseudonyms to protect individuals' privacy. Distributed Reasoning Computational approach where data processing is distributed across multiple locations rather than centralized, enhancing scalability and privacy. Local Algorithms Algorithms that process data locally within the network nodes, minimizing the need for centralized data aggregation. Network Data Aggregator Tool that gathers data from multiple sources within a hospital network for centralized analysis and storage. Smart Grid Infrastructure that utilizes IoT technologies to enhance grid management, energy efficiency, and demand response. Smart Meters (SMs) Devices that provide real-time data on energy consumption, production, and grid conditions. Phasor Measurement Units (PMUs) Devices used in smart grids to measure electrical waves on an electricity grid. Intelligent Energy Devices (IEDs) Devices that facilitate two-way communication and data exchange in smart grid systems. Demand Response (DR) Strategies used to manage consumer demand for energy through various methods. Advanced Metering Infrastructure (AMI) Crucial component of the smart grid providing utilities with real-time data on energy consumption, production, and grid conditions. Renewable Energy Sources (RES) Energy sources that are replenished naturally, such as solar and wind energy. Distributed Energy Storage (DES) Systems that store energy generated from renewable sources at or near the point of use. Distributed Energy Resources (DER) Small-scale units of local generation connected to the grid at the distribution level. Prosumers Consumers who both produce and consume energy. Load Imbalances Situations where the energy demand does not match the energy supply in a power grid. Reverse Power Flows When electricity flows back into the grid from distributed energy resources. AMIaaS Service model that offloads computational tasks to network edge applications, enabling scalable, real-time grid management. Transactive energy framework A system where energy services are traded dynamically through secure, traceable exchanges between consumers, producers, and utilities. 5G Fifth-generation wireless technology that supports high data rates, low latency, and massive connectivity. VNFs Software-based network functions that run on virtualized infrastructure. vMCM VNF that provides digital twin services for monitoring and controlling physical assets. vBCP VNF that integrates blockchain infrastructure for secure data exchange. vAAA VNF that provides identity validation and access control services. DaaS AMIaaS functionality for real-time grid monitoring dashboards. MaaS AMIaaS functionality for local energy trading. PMC Devices used for measuring and controlling power quality parameters. MQTT Lightweight messaging protocol for IoT applications. InfluxDB Time series database for storing and querying large volumes of timestamped data. Grafana Open-source platform for monitoring and analyzing time series data. IoT Network of devices that interact and exchange data through communication networks. AMI System of smart meters and data management technologies for real-time grid monitoring. Continuous Power Quality Assessment An AMI-based system validated for monitoring power quality and managing energy consumption in office and data center environments. Power Measurement and Control (PMC) Devices used for measuring and controlling power quality parameters. 5G technologies Technologies focusing on massive machine-type communications (mMTC) and ultra-reliable low-latency communications (uRLLC). Real-time monitoring The capability to monitor grid conditions as they occur, enabling immediate response and management. Decentralized monitoring A system where monitoring and control are distributed across various locations rather than centralized. Grid stability The ability of the power grid to maintain consistent performance and reliability under varying conditions. Transport Fundamental to modern society, enabling the movement of people and goods, and supporting economic activities. Pollutants Substances that cause air pollution, including particulate matter (PM), ozone (O3), nitrogen dioxide (NO2), carbon monoxide (CO), and hydrocarbons (HC). PM (Particulate Matter) Tiny particles in the air that can penetrate the respiratory system and cause health problems. NO2 (Nitrogen Dioxide) A harmful pollutant produced by vehicle emissions. O3 (Ozone) A pollutant formed by reactions between sunlight and pollutants like NOx and VOCs. EV (Electric Vehicle) A vehicle powered by an electric motor instead of a traditional internal combustion engine. ATMS (Advanced Traffic Management System) Systems that use technology to optimize traffic flow and reduce congestion. V2I (Vehicle-to-Infrastructure) Communication between vehicles and road infrastructure to improve traffic management and safety. Transport System Comprises six pillars: people or things being moved, transport workforce, vehicles, physical infrastructure, digital infrastructure, and regulatory framework. Air Pollution Challenge Air pollution from road transport is a significant global issue, causing health problems and premature deaths. Reducing Vehicle Usage Promoting public transport, cycling, and telecommuting to decrease traffic-related air pollution. Making Vehicles Cleaner Encouraging electric vehicles (EVs) and improving filtration systems to reduce emissions. Optimizing Driver and Vehicle Performance Implementing eco-driving techniques and real-time feedback to enhance efficiency. Reducing Congestion Implementing advanced traffic management systems to alleviate traffic jams. Smoothing Traffic Flow Utilizing adaptive signal control and real-time data to enhance traffic movement. Monitoring Air Pollution Using IoT Enables comprehensive air quality monitoring through various sensors that provide real-time data. Adaptive Signal Control Coordinating traffic signals based on real-time conditions to improve traffic flow. Real-Time Traffic Information Providing updates to road users to optimize routes and reduce delays. Remote Sensing Technologies Using cameras, radar, and GPS to monitor traffic conditions. Singapore's Intelligent Transport System (ITS) Utilizes real-time data from various sensors to manage traffic flow and reduce congestion. SCOOT in the UK An adaptive traffic control system that has been widely deployed and proven to reduce delays, fuel consumption, and emissions. Limitations and Future Directions Challenges remain in accurately modeling emissions and validating the impact of IoT solutions. First Wave Focused on hardware innovations designed to connect everyday objects to networks. Second Wave Introduced advancements in sensors, materials, communication technologies, and protocols. Third Wave Emphasized data management, processing, and analytics, along with concerns about security, privacy, and trust. Actuator A device that converts electrical signals into physical actions like movement, force, or sound. Access Network The part of the network responsible for transmitting data to and from sensors or edge devices. Mobile Edge Computer (MEC) Servers that reduce transmission costs and provide fast, interactive responses by offloading resources, focusing on data aggregation, compression, and transformation. C-PEC (Customer Premises Edge Compute) Computing devices installed on a customer's premises, close to their sensors, LAN, or IoT devices. CSP-PEC (Communications Service Provider Premises Edge Compute) Edge computing devices managed by communications service providers. Zigbee A wireless communication protocol that supports mesh networking and is suitable for short to mid-range communication. LPWAN (Low Power Wide Area Network) A category of wireless communication technologies designed for long-range communication with low power consumption. UNB (Ultra-Narrow Band) Communication systems that transmit signals using a very narrow bandwidth, usually less than 1 kHz. Spread Spectrum A technique where a signal is transmitted over a much broader bandwidth than the original frequency to reduce interference and enhance security. Weightless-P Optimized for low-power, wide-area communications. Weightless-N Designed for higher data rates with lower power consumption. Weightless-W Operates in the 2.4 GHz band. Extended Coverage Refers to IoT-optimized GSM networks that have been upgraded through software enhancements to improve coverage and performance. Narrowband IoT (NB-IoT) Also known as LTE-M2, this technology is designed to reduce power consumption, increase system capacity, improve spectrum efficiency, and extend range for IoT applications. eMBB (Enhanced Mobile Broadband) Provides higher data rates for applications requiring substantial bandwidth. URLLC (Ultra-Reliable Low-Latency Communication) Optimized for critical applications that require high reliability and low latency. mMTC (Massive Machine Type Communications) Supports a large number of devices, accommodating future growth in IoT device numbers. Secure Runtime Environment A collection of security tools designed to minimize vulnerabilities. Identity Access Management (IAM) Controls user access to resources. Secure Boot Ensures that only trusted software can run during the boot process. Device Attestation Verifies the integrity of a device. Trusted Platform Modules (TPMs) Provide hardware-based security functions. Trusted Execution Environments (TEEs) Isolate sensitive processes to protect data. N A JavaScript runtime built on Chrome's V8 engine, used for server-side programming. Node-RED A flow-based development tool built on N, designed for IoT applications. Protocol Adapter A module specific to a particular protocol that transforms incoming sensor data or outgoing actuator commands into a common format. Information Broker An on-board storage module that temporarily stores recently received data from sensors, the cloud, or other modules. Rules Engine A module that routes incoming data from other modules based on predefined rules, enabling automated decision-making. Use Case Specific A module created by developers to perform specialized functions tailored to specific application needs. Management and Security A module responsible for registration, configuration, and implementing security measures to protect the device and data. Information Provider An entity that collects data from its own sensor deployments and shares this data with others under specific terms and conditions. Information Consumer An entity that seeks to leverage diverse data sources to build new applications. Three Main Aspects of Interoperability Discovery, Access Control, and Data Access. Discovery In IoT ecosystems, it involves locating aggregators and finding specific datasets of interest. Access Control Allows information providers to manage and retain control over who can access their data. Data Access The goal is to minimize technical barriers for both data providers and consumers. Sensor Data This refers to the raw measurements or queries obtained from sensors. Dataset A dataset is a collection of related data points, usually organized in a key-value pair format. Journeys Represented as geospatial features (e.g., points, lines, or polygons) with properties described in metadata. Geographical Features Similar to journeys, these are geospatial features (e.g., points, lines, or polygons) with associated properties described in metadata. Situations Aggregates various types of data, including sensor data and contextual information, to provide an interpretation or analysis related to specific times and locations. Batch Processing This method collects new data into separate groups and processes them later based on specific criteria, such as batch size or age. Stream Processing This approach handles each piece of data as it is created, either individually or within a continuous time window. Compression Techniques used to reduce the amount of storage space needed or the bandwidth required for transmitting data. Dimensionality Reduction Methods that decrease the number of variables or dimensions considered in the analysis. Summarization The process of converting data into a format that provides an effective representation of the time series for both human and machine users. Learning and Mining Learning involves automating the creation of models from data, while mining uses these models to extract insights and understand large datasets that would be difficult to analyze manually. Visualization Techniques that convert data into visual formats to make it more accessible and understandable for human viewers. Relational-Based Systems These are built on traditional relational database principles. Stream-Specific Systems These are designed specifically for streaming data and allow for the creation of custom operators that can process and transform data streams. Flink A second-generation stream processing system that provides automated scaling and efficient stream processing. Lambda Architecture A data processing architecture that integrates both stream and batch processing to provide accurate, up-to-date, and near-real-time results. Kappa Architecture A data processing architecture that processes all data as streams and does not include a separate batch layer. Stream Analytics The process of analyzing the radio frequency electromagnetic spectrum in real-time using relatively low-cost sensors. Spectrum Streamer An open-source library used for real-time ingestion of time, frequency, and energy data from the electromagnetic spectrum. Real-Time Notifications Alerts generated from detected transmissions to update spectrum occupancy databases or notify devices about ongoing transmissions on specific channels. Statistical Reporting Reports generated through computational statistics of detected events, aimed primarily at human users for report generation. Custom Applications Applications developed to utilize data from the Spectrum Streamer for generating specific reports or analyses. Standards Development Organizations (SDOs) These organizations create health and safety standards. Industrial Internet Consortium (IIC) Founded in 2014 by AT&T, Cisco, General Electric, Intel, and IBM, this nonprofit promotes open standards and interoperability for technologies in industrial and machine-to-machine (M2M) environments. Alliance for Internet of Things Innovation Launched by the European Commission in 2015, this association aims to boost innovation and economic growth in the Internet of Things (IoT) across Europe. PETRAS Internet of Things Research Hub A consortium of nine leading UK universities that investigates key issues related to privacy, ethics, trust, reliability, acceptability, and security in IoT. Internet of Things Security Foundation (IoTSF) A collaborative, nonprofit organization that addresses the complex cybersecurity challenges in the increasingly connected IoT world. National Cybersecurity Center of Excellence (NCCoE) A U.S. government organization that develops and publicly shares solutions to cybersecurity challenges faced by American businesses. OECD (Organization for Economic Cooperation and Development) An intergovernmental economic organization with 38 member countries, established in 1961 to promote economic progress and global trade. NICE (National Initiative for Cybersecurity Education) A partnership between government, academia, and the private sector that aims to enhance the U.S. capacity to address cybersecurity education and workforce challenges through standards and best practices. Cybersecurity Act Central to the EU's approach to IoT security, this act strengthens the European Union Agency for Network and Information Security (ENISA) by giving it a permanent mandate, a more significant role, and increased resources. ISO 27005 An international standard that provides a general framework for security risk management. Industrial Internet Reference Architecture (IIRA) A standards-based architectural template and methodology designed to facilitate the development and implementation of Industrial Internet of Things (IIoT) solutions. BSI Kitemark A recognizable certification mark often used in the UK to indicate the quality, safety, and trustworthiness of products and services. California Consumer Privacy Act (CCPA) A state statute in California aimed at enhancing privacy rights and consumer protection for residents. Vulnerabilities Equities Process (VEP) A process used by the U.S. federal government to decide how to handle zero-day security vulnerabilities. Distributed Ledger Technology (DLT) A decentralized database managed by multiple participants across various nodes, allowing for a shared and synchronized record of transactions or data. Permissionless DLTs These are open networks where any actor can join and become a node, contributing to the decentralized management of the ledger. Federated DLT A permissioned ledger that is shared among multiple organizations, each having predefined roles and permissions within the network. Decentralization No single entity controls the entire network; instead, control is distributed across all nodes. Immutability Once recorded, transactions cannot be altered or deleted, ensuring the integrity of the data. Auditability Transactions are transparent and can be traced back, making it easier to verify and audit the data. Fault Tolerance The network can continue to operate even if some nodes fail, ensuring reliability. Resilience The network is robust against attacks and failures, maintaining functionality through its decentralized nature. Trust Enhanced trust among participants due to the transparent and immutable nature of the ledger. Adaptability The technology can be applied to various use cases and industries, offering flexibility. Security Advanced cryptographic techniques ensure that transactions and data are secure. Complete Decentralization Eliminates the need for a central authority, reducing points of control and potential failure. Return on Investment (RoI) A performance measure used to assess the efficiency or profitability of an investment. It helps compare the efficiency of different investments. Security Operations Center (SOC) A centralized unit within an organization that uses people, processes, and technology to continuously monitor and enhance the organization's security posture. Archetype Query Language (AQL) A declarative query language designed for querying and retrieving data from archetype-based repositories. Electronic Health Record (EHR) A digital, systematized collection of patient and population health information that can be shared across different healthcare settings. Laboratory Information System (LIS) A software solution that supports the operations of a modern laboratory, including data management and workflow processes. NoSQL A type of database that provides mechanisms for storage and retrieval of data using models other than traditional tabular relations, accommodating various data structures. SM (Smart Meter) A device that records energy consumption and communicates the data back to the utility provider. IED (Intelligent Energy Device) Devices used in energy systems that have advanced capabilities for data collection, processing, and communication. PMU (Phasor Measurement Unit) A device used in power systems to measure electrical quantities with high precision, providing real-time data on system performance. VNF (Virtual Network Function) A software-based network function that runs on virtualized infrastructure, providing various network services. vMCM (Virtual Machine Cloud Machine Function) Provides digital twin services, allowing monitoring and management of physical assets through their digital counterparts. vBCP (Virtual Blockchain Processing Function) Acts as a gateway to blockchain infrastructures, enabling devices to interact with the blockchain without performing mining operations. vAAA (Virtual Authentication, Authorization, and Accounting) A VNF offering authentication, authorization, and accounting services, with two modes: blockchain-based and OAuth 2.0. vMME (Virtual Mobility Management Entity) Manages the registration and presence of devices on the network, handling mobility functions for IoT devices. vSON (Virtual Self-Organizing Network) Enables IoT devices to connect and communicate in a multihop and multiprotocol manner, without direct access to 5G networks. vTSD (Virtual Terminal Service Discovery) Facilitates the discovery of services provided by IoT devices, improving service management and connectivity.

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WGU D337 Objective Assessment Midterm Exam (New 2026/
2027) Internet of Things (IoT) and Infrastructure Quiz Bank|
Questions and Verified Answers| 100% Correct| A Grade

Q. What is the internet of things?
ANSWERS
IoT is a system of sensors connected with communication modules to provide knowledge.



Q. What is the concept of internet of things?
ANSWERS
the idea that everything / every device could be given an ip address and put on the internet. Ex. using your
phone to turn on your microwave



Q. What are the three components of Internet of Things ?
ANSWERS
Sensor nodes
Communication module
Data analytics component



Q. what is a sensor?
ANSWERS
A sensor is a converter that measures a physical quantity and converts it into a electrical signal



Q. What are 5 examples of wireless communication standards?
ANSWERS
Satellite
Wireless USB/ Ultrawideband
Wifi
Wimax
Bluetooth
3G
NFC
ZigBee
GSM


1

,Q. What are the three levels of data analytics?
ANSWERS
data, knowledge, and feedback.




Q. *What are the design goals of the internet of things?
ANSWERS
Mobility
Wireless
Robustness
Intelligence
Energy efficiency



Q. what is a micro-controller?
ANSWERS
A small integrated circuit that can be programmed in a variety of different computer languages.



Q. What does GPIO stand for?
ANSWERS
General Purpose Input/Output



Q. What does IDE stand for?
ANSWERS
Integrated development environment; application with tools that are necessary for developing software



Q. Before your program "code" can be sent to the board, it needs to be converted into instructions that the
board understands. This process is called _______________.

ANSWERS
compiling




2

, Q. What is the code must be included in order to read the analog voltage from the potentiometer?
ANSWERS
int sensorValue = analogRead(A0);



Q. What is the meaning of the code Serial.println(voltage) ?
ANSWERS
This code prints the voltage to the serial window



Q. What are 3 different types of sensors?
ANSWERS
resistive sensors
inductive sensors
capacitive sensors



Q. What is right about resistive transducer?
ANSWERS
From measuring resistance, we can measure the non-electrical parameters




Q. What is a stepper motor?
ANSWERS
A stepper motor is a very precise motor that you can instruct to rotate one step at a time. They are used in CNC
machines, 3D printers and in robotics



Q. What is the line of code controlling the speed of the stepper motor?
ANSWERS
delay(3);




3

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