wireless networkin Flashcards

1
Q

original release
5ghz
54mb/s
shorter range

A

802.11a

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2
Q

original release
2.4ghz
11mb/s
better range

A

802.11b

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3
Q

upgrade to b
2.4ghz
54mb/s
backswords computable with b

A

802.11g

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4
Q

wifi 4
upgrade to a,b,g
works at 5 and 2.4
600mb/s
40mhz mode with 4 antennas
MIMO - multiple input multiple output

A

802.11n

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5
Q

wifi5
upgrade on N
5 ghz range 160mhz channel
channel bonding
denser signal modulation
8 mu-mimo
7gps

A

802.11ac

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6
Q

wifi6
5 ghz 2.4ghz
channel 20, 40, 80, 160 channels
1201 megabits per second
8 bi direction mu mimo streams
OFDMA-orthogonal frequency division multiple access
10gps

A

802.11ax

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7
Q

ibss

A

independent basic service set
no access point required

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8
Q

ssid

A

service set identifer (network name)

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9
Q

The encryption mechanism of the IEEE 802.11 standard, considered to provide only low security.

A

Wired Equivalent Privacy (WEP)

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10
Q

The second generation of Wi-Fi Protected Access (WPA) security.

A

Wi-Fi Protected Access 2 (WPA2)

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11
Q

When configuring wireless networks with overlapping access points using the 2.4Ghz bandwidth which channels offer the best solution for preventing overlapping interface?

A

Channels 1, 6, 11

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12
Q

uses sim cards that can be moved between phones
uses multiplexing
brought from EU
world wide coverage
used by at&t and tMobile

A

GSM global system for mobile communications

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13
Q

uses a code
each code is filtered on receiving time
used by verizon and sprint
not much adoption

A

CDMA code vivision multiple access

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14
Q

what new feastures did 3g introduce

A

gps
mobile tv
video on demand

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15
Q

what is the convergence of GSM AND CDMA called

A

4g and lte long term evolution

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