Podcast
Questions and Answers
What is the primary difference in frequency band between Bluetooth and NFC?
What is the primary difference in frequency band between Bluetooth and NFC?
- 2.4 GHz and 13.56 MHz (correct)
- 2.4 GHz and 5 GHz
- Low frequency band and high frequency band
- Medium frequency band and low frequency band
Which wireless technology is most suitable for large-scale networks?
Which wireless technology is most suitable for large-scale networks?
- Wi-Fi
- Zigbee (correct)
- Bluetooth
- NFC
What is the primary application area of Bluetooth technology?
What is the primary application area of Bluetooth technology?
- Personal area networks, audio streaming, etc. (correct)
- Industrial control systems
- Home automation
- Wireless sensor networks
How do the power consumption levels of Bluetooth and Zigbee compare?
How do the power consumption levels of Bluetooth and Zigbee compare?
What is the typical range of Zigbee technology?
What is the typical range of Zigbee technology?
What is the data rate of NFC?
What is the data rate of NFC?
What is the topology of Bluetooth technology?
What is the topology of Bluetooth technology?
Which technology has the shortest range?
Which technology has the shortest range?
What is the primary purpose of Wireless Local Area Networks (WLANs)?
What is the primary purpose of Wireless Local Area Networks (WLANs)?
What is the primary characteristic that distinguishes wireless networks from wired networks?
What is the primary characteristic that distinguishes wireless networks from wired networks?
Which of the following is a characteristic of WLAN technology?
Which of the following is a characteristic of WLAN technology?
In a wireless network, which of the following is true about signal propagation?
In a wireless network, which of the following is true about signal propagation?
What is the standard for WLAN technology?
What is the standard for WLAN technology?
What is the frequency band used by WiFi technology?
What is the frequency band used by WiFi technology?
What is a major advantage of wireless networks over wired networks?
What is a major advantage of wireless networks over wired networks?
What is a common challenge faced by wireless networks?
What is a common challenge faced by wireless networks?
What is the primary advantage of WLAN technology over wired networks?
What is the primary advantage of WLAN technology over wired networks?
What is a benefit of wireless networks in terms of mobility?
What is a benefit of wireless networks in terms of mobility?
Which of the following is a disadvantage of WLAN technology?
Which of the following is a disadvantage of WLAN technology?
What is a characteristic of an electromagnetic wave?
What is a characteristic of an electromagnetic wave?
What is the range of a typical WLAN network?
What is the range of a typical WLAN network?
What is a key difference between wireless and wired networks in terms of signal reception?
What is a key difference between wireless and wired networks in terms of signal reception?
What is the primary purpose of WiFi Alliance?
What is the primary purpose of WiFi Alliance?
What is a major limitation of wired networks?
What is a major limitation of wired networks?
Flashcards are hidden until you start studying
Study Notes
Wireless Networks
- A network is considered wireless if at least two terminals communicate via a wireless link.
- Wireless networks are an extension of wired networks.
Wireless vs Wired
- Wired networks:
- Communication via cable
- Signals propagate in one direction only
- Signals received only by the destination
- Easy to implement
- Does not support mobility
- Rigid and difficult to maintain
- Expensive to deploy and expand
- Wireless networks:
- Communication via radio waves
- Signals spread in all directions
- Signals received by the destination and all nodes in the wireless coverage area
- Easy to maintain and expand
- Less expensive deployment
- Supports mobility
Benefits and Challenges of Wireless Networks
- Strong features:
- Support mobility
- Easy and fast deployment
- Flexible and agile use
- Easy and quick extension and maintenance
- More cost-effective
- Challenges:
- Security
- Energy
- Mobility issues (location, handover, mobile addressing, etc.)
Wireless Communication Medium
- Electromagnetic wave: a wave that propagates through electromagnetic fields
- Examples of wireless communication:
- Home automation
- Industrial automation
- Sensor networks
- Contactless payments
- Access control
Wireless Local Area Networks (WLAN)
- Range: Medium (maximum 100 meters)
- Purpose: Connect machines that are moderately distanced via wireless links (at the building level)
- Standard: IEEE 802.11
- Technology: WiFi, HipeLan2 (Europe), etc.
- Example: A local network of a company connecting equipment via an access point
WLAN - WiFi
- 1997: Publication of the WiFi (Wireless Friendly) standard by WiFi Alliance
- WiFi is a set of wireless communication protocols
- Data rate: 5.5 Mbps, 11 Mbps (802.11.b), 54 Mbps (802.11.a, 802.11.g), 10 Gbps (high-speed)
- Frequency band: 2.4 GHz | 5 GHz
- Range: About 100 meters (300m)
- Standard: IEEE 802.11.x
- Evolution: .b, .a / g, .n / ac, ..., .ax, ...
- Security: WEP, WPA, WPA2, WPA3
- Architecture:
- Infrastructure mode: connection via an access point
- Ad-hoc mode: direct connection between devices
Bluetooth vs ZigBee vs NFC
- Bluetooth:
- Technology: Wireless communication technology
- Frequency Band: 2.4 GHz
- Range: Short range, typically up to 100 meters
- Data Rate: Medium data rate, up to multi-Mbps
- Power Consumption: Moderate to high
- Topology: Point-to-point, Star
- Suitability for Large-Scale Networks: Limited (piconet)
- Application Areas: Personal area networks, audio streaming, etc.
- ZigBee:
- Technology: Wireless communication technology
- Frequency Band: 2.4 GHz
- Range: Medium range, typically up to 100 meters
- Data Rate: Low to medium data rate, up to 250 Kbps
- Power Consumption: Low
- Topology: Mesh
- Suitability for Large-Scale Networks: Good (Large networks)
- NFC:
- Technology: Wireless communication technology
- Frequency Band: 13.56 MHz
- Range: Very short range, typically up to 10 centimeters
- Data Rate: Low data rate, up to 424 Kbps
- Power Consumption: Very Low
- Topology: Point-to-point, peer-to-peer
- Suitability for Large-Scale Networks: Not applicable
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
