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802.11a
IEEE Wireless Standard for up to 54Mb/s in the 5GHz bands
802.11b
IEEE Wireless Standard for up to 11Mb/s in the 2.4GHz ISM band
802.11g
IEEE Wireless Standard for up to 54Mb/s in the 2.4GHz ISM band
802.11n
IEEE Wireless Standard for up to 600Mb/s in the 2.4 and 5GHz bands
802.11ac
IEEE Wireless Standard for up to 6.9Gb/s in the 5GHz bands
802.11ad
IEEE Wireless Standard for up to 7.75Gb/s in the 60GHz ISB band
802.11af
IEEE Wireless Standard for TV White Spaces (54 - 790MHz)

a


ad-hoc
From Latin for this: a Wi-Fi network with no Access Points.
AP
Access Point: a Wi-Fi radio or group of radios in a single enclosure.

b


band
A range of radio frequencies with a single management policy (e.g. 2.5GHz or 5GHz)
BSS
Basic Service Set: a managed, or infrastructure, Wi-Fi network with Access Points
BSSID
Basic Service Set Identifier: a MAC address used to uniquely identify a particular Wi-Fi Radio

c


chain
a component of a MIMO radio system which drives a single antenna in an array
channel
Wi-Fi channels correspond to particular frequencies in the 2.5 and 5 GHz ISM bands

d


dBm
Decibel Milliwatts: used to give an absolute power value for signal and noise, over a wide range. Wi-Fi signals for e.g. typically range between: 0.01mW (-20dBM) and 0.000000001mW (-90 dBm)
dB
Decibel: Unit used for measuring in scientific and engineering systems, help to express a wide range of values.
DNS
Domain Name System: distributed database containing records used for name and service resolution
domain
A portion of the global DNS namespace, such as istumbler.net or apple.com
DSSS
Direct Sequence Spread Spectrum: used by Bluetooth radios and some legacy 802.11 radios.

e


EMI
Electromagnetic interference: what happens when your fancy toys don't play nicely together.

f


FHSS
Frequency Hopping Spread Spectrum, similar to DSSS.

g


GHz
Gigahertz, 1 GHz is 1,000,000,000 (one billion) cycles a second, common microwave frequency range.
gbit
gigabit: 1,000 (10^3) bits. Usually used to measure network bandwidth.
gbit/s
gigabit per second
GB
gigabyte: 1,000 (10^3) bytes. Usually used to measure storage (Disks, Flash & etc.) size.
GiB
gibibyte: 1024 (2^10) bytes. Usually used to measure memory (RAM & Cache) size.

h


host
A computer connected to the Internet which may offer a service

i


IEEE
Institute of Electrical and Electronics Engineers, publishers of the 802.11 standards.
IBSS
Independent Basic Service Set: an Ad-hoc network
IP
Internet Protocol: the layer three protocol which routes packets across the global internet
ISM
Industrial Scientific and Medical

j


jk
just kidding

k


kbit
kilobit: 1,000 (10^3) bits. Usually used to measure network bandwidth.
kbit/s
kilobits per second
kB
kilobyte: 1,000 (10^3) bytes. Usually used to measure storage (Disks, Flash & etc.) size.
KiB
kibibyte: 1024 (2^10) bytes. Usually used to measure memory (RAM & Cache) size.

l


a network connection between two computers, often the layer 2 or physical connection
level
Signal Level interpreted relative to the noise floor of the channel

m


MAC
Media Access Controller: a unique hardware address assigned to a network interface
mbit
megabit: 1,000,000 (10^6) bits. Usually used to measure network bandwidth.
mbit/s
megabits per second
MB
megabyte: 1,000,000 (10^6) bytes. Usually used to measure storage (Disks, Flash & etc.) size.
MiB
mebibyte: 1024 (2^(10+2)) bytes. Usually used to measure memory (RAM & Cache) size.
mDNS
Multicast DNS: the use of DNS packets over well known multicast addresses for local service discovery
MHz
Megahertz, 1 MHz is 1,000,000 (one million) times second, used to measure frequency and the width of channels.
MIMO
Multiple In Multiple Out: radio systems combining multiple radio chains with multiple antennas for higher performance
MSL
Mean Sea Level: used in GPS coordinates to indicate elevation

n


noise
received energy by the radio which cannot be decoded into signal
noise floor
the lowest possible noise level for a given channel width and frequency

o


OFDM
Orthogonal Frequency Division Multiplexing, used in 802.11a and later Wi-Fi radios

p


PAN
Personal Area Network, wireless networks with a range generally less than 10 meters
pair
Bluetooth devices can be paired by exchanging keys to securely setup a link
peer
Another device or host on the network
protocol
a set of rules for the contents and order of messages between two computers, e.g. HTTP, TCP, IP, Wi-Fi, etc.

q


QOS
Quality of Service: a specific tag added to packets to request priority handling by the network infrastructure, often for deliver of voice and video traffic with minimum jitter and delay

r


RSS
Really Simple Syndication: the publishing technology behind weblogs, news readers and podcasting.
RSSI
Received Signal Strength Indication: a number, typically expressed in Decibel Milliwatts (dBm).

s


signal
The portion of the received energy in the radio which was successfully decoded, usually expressed in dBm
server
A computer program which waits for a client to connect over the network so that it can provide some data. e.g. a web server provides HTML data to a browser so that it can render a web page to the user
SSID
Service Set Identifier: a 1-32 byte string, typically presented as the network name
S/N
Signal to Noise Ratio: the ratio, typically in Decibels, of the signal level to noise as received by the radio. Higher S/N ratios are better.

t


TCP
The Transmission Control Protocol: provides for reliability, ordering and flow control on top of lossy IP networks

u


UDP
User Datagram Protocol: provides for simple, but unreliable and un-windowed communication on top of IP
UHF
Ultra High Frequency
UWB
Ultra Wide Band

v


VHF
Very High Frequency

w


WEP
Wired Equivalent Privacy: an old and very broken form of layer-2 encryption
WFA
Wi-Fi Alliance: Trade Association created to promote 802.11 standards and insure interoperability
Wi-Fi
Wi-Fi: Registered Trade Mark created by the Wi-Fi Alliance to promote the 802.11 standards
WPA
Wireless Protected Access: a new stronger, but still broken, form of layer-2 encryption
WPA2
Wired Equivalent Privacy 2: an even news stronger, not yet broken, form of layer-2 encryption
WTF
Whisky Tango Foxtrot?

x


XML
eXtensible Markup Language (the X makes it much much cooler than "EML" would have been)

y


yotta
a lotta

z


zetta
less than a yotta
ZFS
The greatest filesystem that never was

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