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CNET 121 Network + > 6.1 > Flashcards

6.1 Flashcards

1
Q

All wirelesss ignals are carried through the air by electromagnetic waves. The – – – – – – – – commonly called the airwaves is the frequency range of electromagnetic waves used for data and voice communication

A

Wireless spectrum

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2
Q

As defined by the FCC which controls it use, the wireless spectrum spans frequency ranges or – – – – between 9 kHz and 300 GHz

A

Bands

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3
Q

RF ID frequency range is from – – – – – –/ – – – – – – – – –. These are the lowest of several frequency ranges for rfid and approved for global use

A

125KHZ – 134.2 KHG

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4
Q

Near field communication fix frequency

A

13.56 MHZ

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5
Q

Z wave fixed frequency

A

90.842 MHZ

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6
Q

Cellular frequency range

A

824–8 96MHZ

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7
Q

An additional RF ID range 

A

858– 930MHz

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8
Q

Cellular frequency range

A

1850MHZ – 1990MHZ

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9
Q

Wi-Fi 802.11 BGNAX Frequency range for 2.4 GHz. As well as Zigby, Bluetooth,

A

2.4 GHz – 2.4835 GHz

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10
Q

ANT plus frequency range

A

2.4 57 GHz

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11
Q

Wi-Fi 802.11 ANACAX

A

5.1–5.8 GHz

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12
Q

This technology uses electromagnetic fields to store data or a small chip in an – – – – tag which includes an antenna that can bolt transmit and receive and possibly a battery

A

RFID

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13
Q

NRF ID tag holds between – – – – kilobytes of data such as serial number credit card information or medical data which you can transmit to a nearby reader

A

1–8

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14
Q

This technology is a form of RF ID and transfers data wirelessly over very short distances usually 10 cm or less

A

NFC

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15
Q

Some near field communication tags required no power but others are able to draw power through induction from items such as a

A

Cell phone

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16
Q

This technology is a smart home protocol that provides two basic types of functions one signaling to manage wireless connections and control to transmit data and commands between devices

A

Z wave

17
Q

Add an item called a – – – – – – network controller call the hub receives commands from a smart phone or computer and relays the commands to various smart devices on the Netwerk

A

Z wave

18
Q

Devices on the net worth of Z wave identified by a one bite

A

Node ID

19
Q

What is a wave net worth the entire network has a 4 x 8 – – – –

A

Netwerk ID

20
Q

Based on the 802.1 5.4 standard this technology is a low powered battery conserving wireless technology it is designed to handle small amounts of data and is therefore ideal to use an industrial scientific and medical centers

A

Zigbee

21
Q

This technology defined by IEEE 802.1 5.1 specifications is named after medieval king of Denmark named Harold – – – – –

A

Bluetooth

22
Q

———operates between 2.4 GHz and 2.4835 GHz with a band up to 1600 hops a second to help reduce interference

A

Bluetooth

23
Q

This technology is based on the NT protocol which is an ad hoc wireless protocol operating at 2.4 GHz this is one of Wes acronym to learn as the term ANC simply refers to the insect with small in size tenacious worker

A

ANT plus

24
Q

This technology has found a new life in the world of the Internet of things where is used primarily to collect data through various sensors it is also commonly used in remote control

A

IR infrared

25
Q

Infrared requires a nearly unobstructed – – – between the transmitter and receiver while some devices use a Scanner mode that reflects I are signals of nearly or nearby services in order to circumvents some obstacles

A

Line of sight

26
Q

A short bursts of data transmission on a particular frequency is in the band and the next Bruscos the next frequency in the sequence frequency hopping can happen hundreds of times a second – – – – is it cheaper to implement then DSSS and performs better than DSSS in crowded indoor environments

A

SHSS frequency hopping spread spectrum‘s

27
Q

Data streams are divided and encoding into small chunks call chips which are spread over it all available free country is within one of 3Y channels, all at the same time. Processes of writing and encoding the data is called shipping and spreading ratio used to transform the data is called shipping code

A

Direct sequence spread spectrum

CNET 121 Network + (63 decks)

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