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What advantage is provided by using an NTP server within a wireless solution architecture?
Importance of Time Sync in IoT:Coordinated actions, accurate data analysis, and event logging in wireless IoT solutions often rely on devices having a shared time reference.
NTP's Role:Network Time Protocol (NTP) enables devices to synchronize their clocks against a reliable time source (NTP server), ensuring consistency across the network.
Why Other Options Don't Fit:
IP Addressing: Usually handled by DHCP, not NTP.
Encryption: SSL/TLS secure data in transit, not related to timekeeping.
Name Resolution: Purpose of DNS, not NTP.
References:
Network Time Protocol (NTP):How it works and its importance in distributed systems.
IoT Time Synchronization Challenges:Articles highlighting the need for accuracy in sensor networks and similar use cases.
You are planning a wireless solution. Why should you consider an ongoing monitoring system for use after the solution is deployed?
Ongoing Monitoring for Adaptability:Wireless networks are dynamic environments. Ongoing monitoring is essential because:
Changing Usage Patterns:User numbers and how they utilize the network evolve over time.
Capacity Adjustments:Monitoring reveals if the network needs scaling for more devices or changing use cases.
Security:Helps detect unauthorized access or anomalies.
References
Importance of Wireless Network Monitoring:Resources will detail its role in proactive management
You must plan for encryption in a wireless solution deployment. What type of data should always be encrypted? (Choose the single best answer.)
Most Vulnerable In Transit:Sensitive data (passwords, health information, etc.) is most susceptible to interception while being sent over a wireless network. Encryption is crucial at this stage.
Encryption at Rest and in Memory:While also important, these are often handled with different cryptographic techniques depending on the system.
References:
Wireless Security Protocols:Details on encryption standards like WPA2/WPA3, TLS that focus on protecting data during transmission.
What is the most common difference between a single board computer (SBC) and a controller board?
SBCs (Single Board Computers):Designed as standalone, small-form-factor computers. They often include:
Display Interfaces:HDMI, DisplayPort, etc.
Input Connections:USB for keyboards, mice, etc.
General Purpose Functionality:Can run a full operating system for wider applications.
Controller Boards:Focus on controlling specific hardware or systems.
Limited direct I/O:Limited connectors for displays/input devices.
Specialized tasks:Designed for embedded applications within larger systems.
References
SBC Examples:https://www.raspberrypi.org/,https://www.beagleboard.org/
Controller Board Examples:https://www.arduino.cc/
Key performance indicators and business requirements are most relevant to what operational activity for an existing wireless IoT solution?
KPI alignment:Key Performance Indicators (KPIs) define success metrics for the wireless IoT solution (e.g., uptime, device responsiveness, data accuracy). Continuous monitoring tracks performance against these KPIs.
Meeting Business Needs:Monitoring ensures the solution delivers the intended value. Are response times fast enough? Are business processes supported effectively?
Proactive maintenance:Monitoring can reveal performance issues before they become critical failures, allowing for proactive fixes.
Optimization:Monitoring data over time helps identify areas for fine-tuning the solution to further align with business requirements.
References
Wireless IoT monitoring tools:Vendor documentation or articles on specific tools and the KPIs they can track.
ITIL (Information Technology Infrastructure Library):Frameworks emphasizing monitoring and continuous improvement.
