Computer networksLesson 1 of 3 in the course Link and physical layer

Wi-Fi: Standards, Network Operation, Applications, and Security

5 flashcards · 5 quiz questions · 5 match pairs · 5 fill-in sentences · English

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Summary

This lesson introduces Wi-Fi, the standards behind it, and the events that helped it become widely used. Understanding these foundations makes it easier to see how Wi-Fi devices from different manufacturers can communicate.

Wi-Fi is a family of wireless networking protocols based on the IEEE 802.11 standards. It lets nearby digital devices exchange data using radio waves, commonly to form a local area network (LAN) and provide Internet access.

All flashcards

What is Wi-Fi?
A family of wireless networking protocols based on IEEE 802.11 that uses radio waves to connect devices.
What is an SSID?
The name that identifies a Wi-Fi service set.
What is a basic service set (BSS)?
A group of stations sharing a wireless channel, SSID, and other settings, usually through one access point.
What does MIMO mean in Wi-Fi?
Multiple-input and multiple-output: using multiple antennas at both ends of a connection.
What is WPA2?
A Wi-Fi security standard that uses AES and is considered secure when configured with a strong passphrase.

Quiz questions

  1. What is the IEEE's role in Wi-Fi?Answer: It defines the technical standards used for wireless LAN communication.
  2. How does a Wi-Fi station generally use CSMA/CA before transmitting?Answer: It listens to the channel and waits until it seems idle.
  3. What does a Wi-Fi repeater do?Answer: It relays a network signal to extend coverage, potentially reducing throughput.
  4. What can IEEE 802.11mc Round Trip Time measurements help estimate?Answer: The distance between a device and an access point.
  5. Which statement about WEP is accurate?Answer: It is an early Wi-Fi security method now considered insecure.

Based on the Wikipedia article Wi-Fi, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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