wireless networkin Flashcards
original release
5ghz
54mb/s
shorter range
802.11a
original release
2.4ghz
11mb/s
better range
802.11b
upgrade to b
2.4ghz
54mb/s
backswords computable with b
802.11g
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
802.11n
wifi5
upgrade on N
5 ghz range 160mhz channel
channel bonding
denser signal modulation
8 mu-mimo
7gps
802.11ac
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
802.11ax
ibss
independent basic service set
no access point required
ssid
service set identifer (network name)
The encryption mechanism of the IEEE 802.11 standard, considered to provide only low security.
Wired Equivalent Privacy (WEP)
The second generation of Wi-Fi Protected Access (WPA) security.
Wi-Fi Protected Access 2 (WPA2)
When configuring wireless networks with overlapping access points using the 2.4Ghz bandwidth which channels offer the best solution for preventing overlapping interface?
Channels 1, 6, 11
uses sim cards that can be moved between phones
uses multiplexing
brought from EU
world wide coverage
used by at&t and tMobile
GSM global system for mobile communications
uses a code
each code is filtered on receiving time
used by verizon and sprint
not much adoption
CDMA code vivision multiple access
what new feastures did 3g introduce
gps
mobile tv
video on demand
what is the convergence of GSM AND CDMA called
4g and lte long term evolution
