RCS 303 Exam Preparation Quiz
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Questions and Answers

What is the main focus of the RCS 303 examination?

  • Database Management
  • Wireless Networks (correct)
  • Software Engineering
  • Web Development

Students are permitted to refer to their notes during the examination.

False (B)

What time does the examination begin?

2 hours

Students are only allowed to leave the exam room ____ minutes before the end of the exam.

<p>30</p> Signup and view all the answers

Match the following instructions with the correct actions:

<p>Do not write on the examination paper = Maintaining the integrity of the exam Show your working = Demonstrating calculations Keep phones switched off = Avoiding distractions Start each question on a new page = Organizing answers clearly</p> Signup and view all the answers

Which technique divides the channel by frequency?

<p>FDMA (A)</p> Signup and view all the answers

TDMA allocates a unique frequency band to each user.

<p>False (B)</p> Signup and view all the answers

What does CDMA stand for?

<p>Code Division Multiple Access</p> Signup and view all the answers

In IoT, data collected by sensors is sent to a central system or _____ for processing.

<p>cloud</p> Signup and view all the answers

Match the following IoT components with their descriptions:

<p>Devices/Sensors = Collect data from the environment Data Transmission = Sends data using protocols Data Processing/Analysis = Interprets and derives insights Action = Makes automated decisions based on data</p> Signup and view all the answers

Which of the following is a characteristic of FDMA?

<p>Each user gets a unique frequency (A)</p> Signup and view all the answers

CDMA is resistant to interference because users have unique codes.

<p>True (A)</p> Signup and view all the answers

What are some common communication protocols used in IoT?

<p>Wi-Fi, Bluetooth, Zigbee, Cellular networks</p> Signup and view all the answers

What is a primary issue confronting wildlife conservation in Kenya?

<p>Endangered species poaching (B)</p> Signup and view all the answers

Water distribution management does not benefit from the use of Wireless Sensor Networks (WSNs).

<p>False (B)</p> Signup and view all the answers

What technology can be used to monitor wildlife movements and detect poaching activities?

<p>WSNs (Wireless Sensor Networks)</p> Signup and view all the answers

Kenya is prone to natural disasters such as floods, droughts, and __________.

<p>landslides</p> Signup and view all the answers

Match the following problems with their corresponding solutions:

<p>Wildlife Conservation = Using WSNs to monitor poaching activities Disaster Management = Monitoring environmental factors for early warnings Healthcare Monitoring = Remote patient monitoring through sensors Water Distribution = Effective management through WSNs</p> Signup and view all the answers

What kind of environmental factors can WSNs monitor for disaster management?

<p>Rainfall, ground movement, and soil moisture (A)</p> Signup and view all the answers

WSNs can enhance healthcare delivery in urban centers only.

<p>False (B)</p> Signup and view all the answers

What type of sensors can be used to track animal activity in wildlife conservation?

<p>Motion detectors, cameras, and temperature sensors</p> Signup and view all the answers

What is the primary purpose of frequency allocation by regulatory bodies like ITU?

<p>To assign different frequency bands for specific applications (A)</p> Signup and view all the answers

Higher frequencies are better for wider coverage in access technologies.

<p>False (B)</p> Signup and view all the answers

What are two advanced techniques used by 5G to improve spectrum efficiency?

<p>MIMO and beamforming</p> Signup and view all the answers

Access technologies, like Wi-Fi, often use __________ spectrum to avoid congestion in crowded areas.

<p>unlicensed</p> Signup and view all the answers

Match the following spectrum considerations with their implications:

<p>Frequency Allocation = Choosing appropriate frequencies for coverage and speed Spectrum Efficiency = Maximizing capacity for wireless services Regulatory Considerations = Ensuring fair access and preventing interference Global Harmonization = Ensuring global device compatibility</p> Signup and view all the answers

What is one of the main impacts of competition for spectrum?

<p>Use of unlicensed spectrum in crowded areas (B)</p> Signup and view all the answers

Global spectrum harmonization prevents interference and is critical for technologies like LTE and 5G.

<p>True (A)</p> Signup and view all the answers

Name one type of satellite that is improving bandwidth and reducing latency in satellite communications.

<p>high-throughput satellites (HTS) or low Earth orbit (LEO) satellites</p> Signup and view all the answers

What is the primary functionality of a Personal Digital Assistant (PDA)?

<p>Personal organization and communication (D)</p> Signup and view all the answers

A laptop connected to a hotel’s Wi-Fi provides less flexibility compared to traditional desktop computing.

<p>False (B)</p> Signup and view all the answers

How can RFID technology be used in student attendance tracking?

<p>By implementing RFID tags in student ID cards to automatically record attendance.</p> Signup and view all the answers

The function of an Access Point in a WLAN is to provide __________ to various devices.

<p>internet access</p> Signup and view all the answers

Match the following functionalities with their respective RFID applications:

<p>Student Attendance Tracking = Automatic record keeping in lectures Library Management = Easy check-in and check-out of books Asset Management = Tracking location and usage of equipment Campus Access Control = Monitoring entry and exit of individuals</p> Signup and view all the answers

Which of the following describes an advantage of using RFID tags on library materials?

<p>Enhanced inventory management (D)</p> Signup and view all the answers

The main purpose of a laptop in a hotel room is to restrict access to online services.

<p>False (B)</p> Signup and view all the answers

What is one major challenge when implementing the wireless network project?

<p>Signal interference (D)</p> Signup and view all the answers

What does equipping university equipment with RFID tags help maintain?

<p>An accurate inventory</p> Signup and view all the answers

Implementing repeaters or a mesh network can help address coverage gaps in a wireless network.

<p>True (A)</p> Signup and view all the answers

What encryption protocol is recommended for securing wireless communications?

<p>WPA3</p> Signup and view all the answers

Conducting a thorough site survey can help identify potential sources of __________ in a wireless network.

<p>interference</p> Signup and view all the answers

Which of the following is NOT a mitigation procedure for signal interference?

<p>Place APs randomly (A)</p> Signup and view all the answers

Regular security audits are unnecessary for maintaining wireless network security.

<p>False (B)</p> Signup and view all the answers

Name one disadvantage of using IP broadcast subnetting in a wireless network.

<p>Capacity wastage</p> Signup and view all the answers

Match the challenge of implementing a wireless network with its mitigation procedure:

<p>Signal Interference = Conduct a thorough site survey Coverage Gaps = Implement a mesh network Security Risks = Use strong encryption protocols</p> Signup and view all the answers

Flashcards

Closed Book Examination

An exam where students are not allowed to use any reference materials, like textbooks, notes, or electronic devices.

Reference Books

Textbooks, manuals, or other resources that provide information on a specific subject.

Special Instructions

Specific guidelines provided for a particular exam that clarify the exam format, requirements, and procedures.

Show Your Working

In an exam, demonstrating the steps or calculations used to arrive at a solution, rather than just stating the final answer.

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Registration No.

A unique identifier assigned to a student for enrollment and administrative purposes.

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WSN

Wireless Sensor Network: A network of interconnected sensors that collect and transmit data wirelessly without human intervention.

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Water Management

WSN's application in optimizing water distribution across communities, ensuring safe access.

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Wildlife Conservation

WSN's role in tracking wildlife movements and detecting poaching activities in national parks.

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Anti-Poaching

WSNs help in anti-poaching efforts by sending alerts to rangers for immediate response.

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Disaster Management

WSNs application in monitoring environmental factors like rainfall and ground movement to provide early warnings in disaster-prone areas.

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Early Warning Systems

WSNs can trigger evacuations or preventive actions to mitigate disaster impact in susceptible areas.

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Healthcare Monitoring (Rural)

WSNs use in monitoring vital signs in remote areas, enabling better healthcare delivery to underserved regions.

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Remote Diagnosis

WSNs allow healthcare professionals in urban centers to remotely diagnose patients in rural areas.

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Desktop Computer

A powerful computer designed for intensive tasks like editing, design, and data analysis. Often features large displays and powerful hardware.

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PDA (Personal Digital Assistant)

A mobile device focused on personal organization and communication, like calendars, contacts, and emails. Less powerful than a desktop.

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Laptop in a Hotel

A portable computer used for work or leisure while traveling, connecting through the hotel's Wi-Fi network.

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Access Point (WLAN)

A device that extends a wireless network's coverage, allowing multiple devices to connect in a building.

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RFID (Radio Frequency Identification)

A technology that uses tags and readers to identify and track objects or people.

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RFID in Attendance Tracking

RFID tags on student ID cards automatically record attendance, streamlining management.

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RFID in Library Management

RFID tags on books simplify checkout/checkin, improving inventory control and reducing loss.

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RFID in Asset Management

RFID tags on equipment track location and usage, ensuring resources are efficiently used.

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Frequency Allocation

Different frequency bands, like those used for cellular or Wi-Fi, are specifically assigned for different applications. Regulatory bodies ensure no interference and manage this process.

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Spectrum Efficiency

Efficiently using spectrum, like in wireless services, maximizes capacity for the number of users. Technologies like 5G use advanced techniques to improve efficiency.

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Regulatory Considerations

Spectrum usage is regulated to ensure fair access and prevent interference. Access technologies must comply with these rules for global compatibility, such as in LTE and 5G networks.

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Competition for Spectrum

Spectrum is limited, and different industries or providers compete for its use.

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Propagation Characteristics

Lower frequencies provide wider coverage, while higher frequencies offer faster speeds with limited range.

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Global Harmonization

The ITU works on global spectrum harmonization to prevent interference between different countries.

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High-Throughput Satellites (HTS)

These satellites provide significantly more bandwidth and data capacity compared to traditional satellites, enabling faster data transfer rates.

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Low Earth Orbit (LEO) Satellites

These satellites orbit closer to Earth, which results in lower latency (delay) during data transmission, making them ideal for real-time applications.

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Signal Interference

Wireless signals can be weakened by physical obstacles like buildings and trees, or electronic devices like microwaves and cordless phones.

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Coverage Gaps

Areas with poor or no wireless signal coverage, often found in urban areas with varying building heights.

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Security Risks

Wireless networks are vulnerable to unauthorized access and data breaches, which can compromise sensitive information.

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Site Survey

A thorough examination of the area to identify potential sources of interference and optimal locations for Access Points (APs).

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Frequency Management

Using dual-band routers and configuring APs to operate on less congested frequencies to minimize interference.

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Strategic Placement

Careful planning of AP locations to ensure overlapping coverage areas and minimize dead zones.

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Repeaters or Mesh Networks

Using devices that amplify the wireless signal or creating self-healing connections between APs to extend coverage in hard-to-reach areas.

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Encryption Protocols

Security measures like WPA3 that protect wireless communications and user data by scrambling data.

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What is the Internet of Things (IoT)?

A network of devices embedded with sensors that collect, send, and analyze data to enable automated actions or user insights.

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IoT Components

The main components of IoT include devices/sensors, data transmission mechanisms, data processing/analysis, and action/decision-making.

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FDMA (Frequency Division Multiple Access)

A channel separation technique where users are allocated unique frequency bands, allowing them to transmit simultaneously.

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TDMA (Time Division Multiple Access)

A channel separation technique where users get specific time slots to transmit on the same frequency.

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CDMA (Code Division Multiple Access)

A channel separation technique where users share the same frequency but use unique codes to distinguish their signals.

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FDMA Efficiency

Less efficient than other methods due to fixed frequency allocation, leading to limited sharing.

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TDMA Efficiency

More efficient than FDMA, but requires synchronization to prevent collisions between time slots.

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CDMA Efficiency

Most efficient as many users can share the same frequency simultaneously using different codes.

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Study Notes

General Instructions

  • Students are not permitted to write on the examination paper.
  • Textbooks, reference books, and notes are not allowed.
  • Answer question 1 and at least two other questions.
  • Questions in all sections should be answered in the answer booklet(s).
  • Start each answer on a new page.
  • Turn off phones and keep bags and other items at the front of the room.
  • Do not refer to unauthorized materials.
  • Always show your working.
  • Write your registration number on the answer booklet.
  • Write the question number in the order you answer them on the answer booklet.
  • Do not use your phone as a calculator.
  • Leave the exam room 30 minutes before the end of the exam.
  • Do not write on the question paper.
  • Use the back of the booklet for calculations and rough work.

Special Instructions (RCS 303: Wireless Networks)

  • The exam is 2 hours long.
  • Answer questions in the provided answer booklet(s).
  • Start each question on a new page

Question One (30 Marks): Section A - Compulsory

  • Define the following terms related to satellite communication:
    • Earth station (a ground-based facility communicating with satellites)
    • Uplink (signal sent from Earth station to satellite)
    • Downlink (signal sent from satellite to Earth station)
    • Transponder (satellite device receiving, amplifying, and retransmitting signals)
    • Elevation angle (angle between horizontal plane and line of sight to satellite)
  • Enumerate three benefits of spread spectrum:
    • Enhanced security: Makes signals harder to intercept and decode.
    • Resistance to interference: Minimizes the impact of noise and jamming.
    • Efficient bandwidth utilization: Allows multiple users to share the same frequency without interference.
  • Identify three significant strengths of wireless communication systems over wired systems:
    • Mobility: Users can access the network without being tied to a physical location.
    • Ease of installation: No need for physical cables.
    • Scalability: Easily accommodates more users and devices without major infrastructure changes.
  • Describe IEEE 802.11d, 802.11e, and 802.11h standards.
    • 802.11d: Enables Wi-Fi devices to work across different countries by adapting to local regulations for frequency and power limits.
    • 802.11e: Improves quality of service by prioritizing different types of traffic (e.g., voice, video) in multimedia applications.
    • 802.11h: Includes dynamic frequency selection and transmit power control to minimize interference while complying with European regulations for 5 GHz operation.
  • Describe half-wave dipole, quarter-wave dipole, and parabolic antennas. Include their radiation patterns and application examples.

Question Two (20 Marks): Section B - Answer any two

  • Internet of Things (IoT): Explain how IoT works with relevant diagrams. Detail applications in smart homes, healthcare, industrial IoT, and smart cities.

Question Three (20 Marks): Section B - Answer any two

  • Wireless Communication Spectrum Considerations: Discuss spectrum allocation, efficiency, regulatory considerations, and competition. Describe the significance in relation to access technologies.

Question Four (20 Marks): Section B - Answer any two

  • Bluetooth Technology: Explain Bluetooth technology, its security threats, mitigation strategies, and applications in various contexts, including audio, peripherals, healthcare, home automation, and automotive.
  • Long Range Communication Transmission Functions: Briefly describe six major transmission functions required in long-range communication: Modulation, Amplification, Frequency Conversion, Multiplexing, Error Detection and Correction, and Demodulation.

Question Five (20 Marks): Section B - Answer any two

  • OSI Layers in Wireless Networks: Detail each of the five layers (Application, Presentation, Session, Transport, and Network) in an OSI protocol suite for wireless networks, including the role and importance of each. Give examples of applications at each layer.
  • Wireless Network in Riara University: Explain the usage and impact of RFID technology in a Riara University campus context for applications like asset management, campus access control, and more relevant contexts. Describe network security considerations. Outline any five critical issues relevant to developing a wireless networking policy. Explain and/or describe Bandwidth Management policies and Acceptable Use policies relevant to the context.

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Riara University Wireless Networks Past Paper 2024 PDF

Description

Test your knowledge on the key concepts and techniques related to the RCS 303 examination. This quiz includes questions on IoT components, communication protocols, and unique coding methods such as CDMA and FDMA. Prepare effectively by matching descriptions and understanding exam protocols.

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