Understanding Wifi and Its
Function - Wifi
is a wireless technology with 2.4GHz radio frequency for data transmission. It
can be used in various wireless devices such as notebook computers, personal
digital assistants (PDAs), mobile phones and smart phones, to access the
Internet.
All
recognized wireless LAN technologies with Wifi must be approved through the
Institute of Electrical and Electronics Engineers (IEEE), and now, IEEE 802.11b
and IEEE 802.11g are the two standards available.
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What are the advantages of
wireless wifi technology?
Within
the range, users can quickly access internet via their own electronic devices
that are embedded with Wifi technology. Compared to other wireless
technologies, acknowledged WiFi products can improve compatibility between
terminal users or access points that enable easy and stable wireless services.
What kind of electronic products
support WiFi technology?
The
Wifi service is now more popular with the growing scope and availability, many
computer manufacturers and consumer electronics have incorporated WiFi functionality
into their products. The notebook computers, smart phones, PDAs and handheld
electronic gaming devices, are examples that have Wifi functionality. In
addition, some digital cameras and photo frames also include this function.
How fast is Wifi wireless
network?
According
to IEEE 802.11b and IEEE 802.11g, the optimal wireless wifi transmission speed
is 11Mbps and 54Mbps. Meanwhile, in the next generation of 802.11n standard,
the optimum speed can reach 248Mbps. For
other standards, such as SuperG, Afterburner, Draft N 2.0, their maximum speed
is 108Mbps, 125Mbps and 450Mbps. However, since they have not been approved by
IEEE, Wifi wireless network will not offer this communication standard.
How far can Wi-Fi cover in
outdoor areas?
Wifi
signal can reach 100m in outdoor area. However, it depends on the distance
between the user's geographical location and the Wireless Access Point. The
resistance between the two points will weaken the signal and decrease the
transmission speed.
Will Wi-Fi wireless networks
interfere?
If
there are some constraints between the Wireless Access Point and the user, the
signal will be blocked which in turn affects the transmission speed. The effect
may vary with different materials and surface area barriers. Furthermore, WiFi
networks will also interfere when there are other wireless networks with the
same frequency or electronic devices that use the 2.4GHz frequency bandwidth in
coverage.
What is the WiFi app offering
wireless networking?
Users
can access the Internet via WiFi network to browse web pages, manage email,
video conference, chat or instant massage.
What does the SSID (Service Set
Identifier) mean?
SSID
is a wireless network identity code that is also considered a wireless LAN
name, allowing no more than 32 characters or symbols. When the user must
connect to set-Wi Fi LAN, both the SSID must be same. Therefore, the main
function of SSID is to differentiate different wireless LANs. In a WiFi
wireless network, SSID is the name of the Wireless Access Point network during
broadcast.
What are the two major WiFi
communication modes?
The
two main modes of WiFi communication are ad-hoc mode and infrastructure mode.
Ad-hoc mode is a communication between different user terminals. While
infrastructure mode is the communication between the user terminal and Wireless
Access Point, and is commonly used in WiFi wireless Internet access.
What does Radio Frequency mean?
Radio
frequency refers to electrical waves that can spread to a certain space, any
sound, image and data can convert and transmit into the atmosphere via radio
frequency. According to Article 2 of Radio Regulations, radio frequency is a
type of wireless communication with a frequency lower than 3,000GHz.
What is the WiFi wireless network
frequency?
IEEE
approves standard - IEEE 802.11b and IEEE 802.11g both use 2.4GHz, while IEEE
802.11a uses 5GHz. In addition, the next generation of standard 802.11n
wireless LAN also uses 2.4GHz.
Will WiFi automatically switch to
other commercial wireless networks?
Some
mobile devices will substitute the internet access service between GPRS / 3G
and other Wifi services automatically, depending on signal strength. If more
than one wireless or mobile service is available, the one with the strongest
signal can be connected.
How to avoid mobile devices
automatically switch from WiFi to other commercial wireless networks?
To
avoid disputes over connection charges allegations, users should be aware of
data services that use and characteristics of mobile devices. To avoid
connecting to GPRS incurred cost / 3G or Wifi service accidentally, the user
must turn off the internet access feature of GPRS, 3G and WiFi, and disable the
automatic connection feature to this network.
Is it safe to use Smartphone as a
hotspot?
It is safe to use only
if you use the manufacturer supported Smartphone Operating System and configure
a hotspot with a password that is well protected WPA2-PSK