Type Of Wifi
WIFI or WLAN Wireless LAN is a network of computers
connected together without the use of wires, but uses radio frequencies to
transmit and receive data.
As a result, users have a high flexibility and is not
dependent on a place or location.
Immediately following type-type is:
1. Type 802.11a
This type of wireless first issued in 1999. This type of
wireless standards have data transfer speeds reaching 54 Mbps and works at a
frequency of 5 GHz.
Transmission method used is Orthogonal Frequency Division
Multiplexing (OFDM)
which allows pertransmisian data in parallel in the sub
frequency (resistant to interference with other waves) has a maximum range of
35 meters indoor and 120 meters outdoor. The 802.11a standard is not compatible
with 802.11b and 802.11g
2. Type 802.11b
This type of wireless appeared on the market in the early
2000s. This type of wireless standard has a data transfer rate of 5.5 Mbps / 11
Mbps and work on
a frequency of 2.4 GHz. Also known as IEEE 802.11 HR. But in
fact this type of wireless maximum speed to 5.9 Mbps on the TCP protocol and
7.1 Mbps on the UDP protocol. Transmission method used is DSSS. has a maximum
range of 38 meters indoor and 140 meters outdoor.
3. Type 802.11g
This type of wireless
began to be published in June of this type have 2003.Standar wireless data
transfer speeds reaching 54 Mbps in the 2.4 GHz frequency. As well as the usual
IEEE 802.11 and IEEE 802.11b. Standard wireless network that is almost the same
as 802.11b but the transmission method used is the same as 802.11a OFDM. Has a
maximum range of 38 meters indoor and 140 meters outdoor.
4. Type 802.11n
This type of wireless first issued in 2009. In theory this
type have a wireless data transfer speeds up to 600 Mbps, but after testing the
WiFi Alliance just transfer speed of 450 Mbps. Working at a frequency of 2.4
GHz / 5 GHz.
Just as MIMO (multiple-input multiple-output). This type of
work with a wireless transmitter and receiver mengutilitasi signal so that data
transmission can be performed in parallel to improve troughtput 50-144 Mbps.
Has a maximum range of 70 meters indoor and 250 meters outdoor. wifi This type
of device will also be applied at the router and adapter.
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