2.3 – Wireless Networks: Wireless Network Technologies
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Questions and Answers

What is the maximum bandwidth that can be used for communication as mentioned?

  • 20 MHz
  • 80 MHz
  • 160 MHz (correct)
  • 40 MHz

What does ISM stand for in the context of the 2.4 GHz band?

  • International, Standard, and Metric
  • Internet, Social, and Media
  • Integration, Security, and Management
  • Industrial, Scientific, and Medical (correct)

What is the typical operating distance of consumer Bluetooth devices?

  • 100 meters
  • 5 meters
  • 20 meters
  • 10 meters (correct)

Why do Bluetooth and 802.11 networks commonly use the 2.4 GHz band?

<p>It does not require special licensing. (B)</p> Signup and view all the answers

What feature distinguishes industrial Bluetooth from standard Bluetooth?

<p>Longer operating distance (D)</p> Signup and view all the answers

What is a significant advantage of using the 5 GHz spectrum over the 2.4 GHz spectrum?

<p>It has more available channels. (C)</p> Signup and view all the answers

Which channels are primarily used in the 2.4 GHz frequency band?

<p>Channels 1, 6, and 11 (B)</p> Signup and view all the answers

What role do governmental agencies play in managing 802.11 networks?

<p>They dictate which channels can be used. (D)</p> Signup and view all the answers

Why is it advisable to use different wireless channels for multiple access points in a specific area?

<p>To reduce channel interference. (A)</p> Signup and view all the answers

In the context of 802.11 networks, what is the primary purpose of assigned numbers to frequencies?

<p>To simplify reference to specific channels. (A)</p> Signup and view all the answers

What limitation does the 2.4 GHz band face compared to the 5 GHz band?

<p>Limited bandwidth options. (C)</p> Signup and view all the answers

What spectrum range is primarily associated with 802.11 networks?

<p>2.4 to 5 GHz (A)</p> Signup and view all the answers

Which of the following is NOT typically a requirement set by governmental regulations for 802.11 networks?

<p>Data transfer speed mandates (B)</p> Signup and view all the answers

Flashcards

802.11

A family of wireless network protocols used for various devices, including phones, laptops, and tablets.

Bluetooth

A communication standard for short-range wireless connections, often used for headphones, keyboards, and speakers.

2.4 GHz Band

The range of radio frequencies used by Bluetooth devices.

ISM Band (Industrial, Scientific, and Medical)

A portion of the 2.4 GHz band available for use without government licensing, allowing devices like Bluetooth to operate.

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Personal Area Network (PAN)

The area covered by a Bluetooth device's wireless communication, typically within 10 meters.

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2.4 GHz

The frequency range used for wireless communication in 802.11 networks, typically for older devices and lower data speeds.

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Channel

A set of frequencies within a specific frequency range, used to separate wireless network traffic.

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5 GHz

The 5 GHz frequency range used for wireless communication in 802.11 networks, generally for newer devices and faster data speeds.

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Bandwidth

The amount of data that can be transmitted over a specific frequency in a given amount of time.

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Wireless Network

A group of wireless devices that share a common frequency for communication.

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Access Point

A device that broadcasts a wireless signal, allowing other devices to connect to a network.

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Spectrum Management

Government agencies are responsible for regulating the use of the radio spectrum.

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Power Output

The amount of power a wireless device can transmit.

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Study Notes

802.11 Network Specifications

  • 802.11 networks use different frequency ranges (2.4 GHz and 5 GHz)
  • Different standards use various frequency ranges for communication
  • Channels are groups of frequencies assigned by IEEE for easier identification
  • Multiple access points in an area should use different channels to reduce interference

2.4 GHz Networks

  • Common channels are 1, 6, and 11 (20 MHz bandwidth)
  • Frequencies range from 2412 MHz to 2482 MHz
  • Limited channel options for 2.4 GHz create interference issues in dense environments
  • 2.4 GHz is often crowded due to the three available channels and widespread use for multiple devices

5 GHz Networks

  • Many more 20 MHz channels are available in the 5 GHz range compared to 2.4 GHz
  • Easier to find available channels in areas with many access points
  • Larger bandwidth options (40MHz, 80MHz, 160MHz) for higher throughput
  • 160 MHz uses non-contiguous channel areas

Bluetooth Networks

  • Bluetooth uses the 2.4 GHz frequency band
  • The Industrial, Scientific, and Medical (ISM) part of the 2.4 GHz band is unlicensed, allowing anyone to use it
  • 802.11 and Bluetooth both utilize the 2.4 GHz ISM band due to its unrestricted use
  • Bluetooth operates on a personal area network (PAN) with a limited range typically around 10 meters for consumer devices
  • Extended distances are possible with industrial Bluetooth standards, reaching over 100 meters

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Description

Test your knowledge on 802.11 network specifications, including the differences between 2.4 GHz and 5 GHz networks. Explore how various standards and channels impact network performance and interference. This quiz covers essential aspects of wireless communication.

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