Wi-Fi Frequency and Transmission Quiz

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What impact does the 2.4 GHz frequency have on transmission range and data throughput?

Greater transmission range and slower data throughput

Why is the 2.4 GHz frequency more susceptible to interference from devices like cordless phones and microwave ovens?

It is an open frequency range

What is the impact of the higher 5 GHz frequency on transmission range and data throughput?

Shorter transmission range and faster data throughput

How many available channels does the U.S. have in the 2.4 GHz range for Wi-Fi?

<p>11</p> Signup and view all the answers

Why do devices automatically select a channel in the 2.4 GHz range?

<p>To avoid interference from other devices</p> Signup and view all the answers

Why do we not have to manually set channels in the 5 GHz range?

<p>There is more room in the RF spectrum at that range</p> Signup and view all the answers

Which organization has defined 14 different 22 MHz communications channels but only allows for the use of the first 11 channels?

<p>Federal Communications Commission (FCC)</p> Signup and view all the answers

How many defined 20 MHz channels are there at 5 GHz for Wi-Fi communications?

<p>25</p> Signup and view all the answers

Which standard defines Bluetooth for communication over short distances in a personal area network (PAN)?

<p>IEEE 802.15.1</p> Signup and view all the answers

Which Wi-Fi specification is used for Wi-Fi communications at a frequency of 5 GHz and has a maximum throughput of 6.5 Gbps?

<p>ac (Wi-Fi 5)—5 GHz frequency, 6.5 Gbps maximum throughput, 140 meters range</p> Signup and view all the answers

What type of technology employs directional antennas to send and receive network signals usually from 10 to 20 km?

<p>Long-Ranged Fixed Wireless</p> Signup and view all the answers

What is the term for frequencies whose use is granted by the FCC in the US?

<p>Licensed frequencies</p> Signup and view all the answers

What is the range of near-field communication (NFC)?

<p>~a few inches</p> Signup and view all the answers

What is the common use of near-field communication (NFC) today?

<p>Contactless payment systems</p> Signup and view all the answers

What does radio-frequency identification (RFID) use to send information from an RFID tag with identifying information?

<p>$ ext{Radio signal}$</p> Signup and view all the answers

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