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CompTIA A+ 1101 (Core 1) (Retired) > 2.3 - Compare & contrast protocols for wireless networking > Flashcards

2.3 - Compare & contrast protocols for wireless networking Flashcards

1
Q

What is 802.11 aka?

2.3 - Compare & contrast protocols for wireless networking: 802.11

A

Wi-Fi

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2
Q

Who manages the Wi-Fi trademark?

2.3 - Compare & contrast protocols for wireless networking: 802.11

A

Wi-Fi Alliance

They ensure WiFi devices are compatible & comply with industry standards

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3
Q

What do 802.11 standards define?

2.3 - Compare & contrast protocols for wireless networking: 802.11

A

wireless data transmission in small areas using unlicensed frequency bands

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4
Q

List 6 common IEEE 802.11 Wi-Fi standards

2.3 - Compare & contrast protocols for wireless networking: 802.11

A
  • 802.11a
  • 802.11b
  • 802.11g
  • 802.11n
  • 802.11ac
  • 802.11ax
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5
Q

What does the choice of network frequency determine in wireless communication?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

Which channels can be used

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6
Q

Typical channels for 5GHz frequencies?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

36-165

Typically ranges from 36 to 165

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7
Q

Most commonly used RF bands for wireless communication?

(including wifi networks)

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

ISM 2.4 & UNII 5GHz radio bands

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8
Q

What are frequency bands?

i.e. 2.4GHz & 5GHz

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

Ranges of radio waves used for wireless data transmissions

(between devices)

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9
Q

What are radio bands?

i.e. ISM & UNII

A

Frequency bands allocated for radio communication

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10
Q

How do 2.4GHz differ from 5GHz RF bands?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

By usually being more crowded & having a wider range of devices that operate on it

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11
Q

Compared to 5GHz RF bands, 2.4GHz often leads to…?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

interference & reduced performance

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12
Q

How do 5GHz RF bands differ from 2.4GHz RF bands?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

By having a narrower range of devices that operate on it, making it less crowded

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13
Q

Compared to 2.4GHz RF bands, 5GHz often leads to…?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

less interference & better performance

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14
Q

Regulations

What are unlicensed RF bands?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

RF bands that anyone can use without a license

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15
Q

Regulations

What are licensed RF bands?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

RF bands that have fees or requirements in order to use them

Licensing &/or registration fees

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16
Q

Regulations

Downside to using ISM bands for Wi-Fi?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

They are unlicenced & used for different purposes besides Wi-Fi, which can cause interference

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17
Q

802.11 standards that ONLY use the 2.4GHz ISM band?

Excluding the ones that ALSO use the ISM bands

2.3 - Compare & contrast protocols for wireless networking: 802.11

A

802.11b & g

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18
Q

802.11 standards that ONLY use the 5GHz UNII band?

A

802.11a & ac

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19
Q

802.11 standards that can use 2.4GHz ISM band & 5GHz UNII band?

A

802.11n & ax

20
Q

What is a network channel?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

Pathway used to transceive data between devices

Pathway may be a physical wire, wireless connection, or logical connection established through network protocols

21
Q

How is a RF band divided?

RF band like 2.4/5GHz

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

into channels that are identified by number or name

i.e. 1-11 for 2.4GHz

22
Q

How many channels does the 2.4GHz band have?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

Up to 14 channels

23
Q

How many non-overlapping channels does the 2.4GHz band have?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

3 non-overlaping channels

(1, 6, 11)

24
Q

what are non-overlapping channels?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

channels in a frequency band that do not interfere with each other

25
Q

non-overlapping channels can be used…?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

simultaneously without causing interference or degradation

26
Q

How many non-overlapping channels does the 5GHz band have?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

Up to 24 non-overlapping channels

Depending on the region

27
Q

Downside to 5GHz bands over 2.4GHz bands?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

They have shorter range

Which may need more APs to cover an area

28
Q

How many channels does the 5GHz band have?

2.3 - Compare & contrast protocols for wireless networking: Frequencies | Channels

A

Up to 200+ channels

200 or more*

29
Q

What frequency bands does bluetooth use?

2.3 - Compare & contrast protocols for wireless networking: Bluetooth

A

2.4GHz ISM RF band

30
Q

What is an ad hoc wireless connection?

2.3 - Compare & contrast protocols for wireless networking

A

A wireless network formed without a pre-existing infrastructure

i.e. bluetooth, NFC, RFID, etc.

31
Q

What was an upgrade to 802.11a & b?

2.3 - Compare & contrast protocols for wireless networking: 802.11

32
Q

What are the limitations with backward-compatiblity in 802.11 standards?

2.3 - Compare & contrast protocols for wireless networking: 802.11

A

Newer standards may be limited to the capabilties of older devices

33
Q

What 802.11 standard was an upgrade to 802.11g

2.3 - Compare & contrast protocols for wireless networking: 802.11

34
Q

802.11n is aka…?

2.3 - Compare & contrast protocols for wireless networking: 802.11

35
Q

What is an upgrade to 802.11n?

2.3 - Compare & contrast protocols for wireless networking: 802.11

36
Q

What is 802.11ac aka?

2.3 - Compare & contrast protocols for wireless networking: 802.11

37
Q

What is an upgrade to 802.11ac?

2.3 - Compare & contrast protocols for wireless networking: 802.11

38
Q

What is 802.11ax aka?

2.3 - Compare & contrast protocols for wireless networking: 802.11

39
Q

What is long-range fixed wireless?

2.3 - Compare & contrast protocols for wireless networking: Long-range Fixed Wireless

A

Fixed wireless technology for data transmission of over long distances using stationary equipment

40
Q

Regulatory requirements for wireless power

Installing outdoor antennas requires…?

2.3 - Compare & contrast protocols for wireless networking: Long-range Fixed Wireless

A

meeting safety requirements

41
Q

Regulatory reqruiements for wireless power

What do wireless regulations vary by? How are they enforced?

2.3 - Compare & contrast protocols for wireless networking: Long-range Fixed Wireless

A

country & are enforced by each country’s regulatory agency

42
Q

What to know before setting up a long-range fixed wireless network?

(including 5G-FWA & legacy fixed wireless systems)

2.3 - Compare & contrast protocols for wireless networking: Long-range Fixed Wireless

A

Rules & regulations in that area

43
Q

What is RFID technology used for?

2.3 - Compare & contrast protocols for wireless networking: RFID

A

To Identify & track objects using radio waves

44
Q

2 types of RFID tags?

2.3 - Compare & contrast protocols for wireless networking: RFID

A

Passive or Active RFID tags

45
Q

How do passive RFID tags work?

2.3 - Compare & contrast protocols for wireless networking: RFID

A

Don’t have a power source & rely on the reader’s energy to transmit their signal

46
Q

How do active RFID tags work?

2.3 - Compare & contrast protocols for wireless networking: RFID

A

Have their own power source & can transmit their signal over long distances

CompTIA A+ 1101 (Core 1) (Retired) (23 decks)

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