User's Manual

User’s Manual Wireless Module - Android
3. Security
Because wireless networks rely on radio signals to transmit data, they are not as secure
as wire network. Wireless networks are susceptible to viruses and breaches like
eavesdropping and need to be protected in order to be secure.
There are many security measures to safeguard wireless networks, protect the data, and
keep unauthorized users out. Hotspots, on the other hand, are often free of standard
security practices in an effort to make it easy for anyone to connect. It may be found that
some pay hotspots administered by service providers offer have some level of security,
however, when using a hotspot, it’s always a good idea to be proactive and to employ
security measures of your own.
4. Key terms
Wi-Fi: short for “wireless fidelity”, a generic label that refers to wireless networks or
networking.
Hotspot: a specific geographic location in which an access point provides public wireless
broadband network services to mobile visitors through a WLAN.
Throughput: the amount of data transmitted in a set amount of time.
Bandwidth: the amount of data that can be carried from one point to another in a given
time period (usually a second).
Chipset: a group of microchips that execute various functions (like memory) to support the
CPU.
5. Specifications (Typical)
Operation Frequency:
2412MHz~2462MHz (802.11b/802.11g/802.11n(H20))
2422MHz~2452MHz (802.11n(H40))
Channel numbers:
11 for 802.11b/802.11g/802.11(H20)
7 for 802.11n(H40)
Channel separation:
5MHz
Modulation technology:
(IEEE 802.11b)
Direct Sequence Spread Spectrum (DSSS)
Modulation technology:
(IEEE 802.11g/802.11n)
Orthogonal Frequency Division Multiplexing(OFDM)
Data speed (IEEE 802.11b):
1Mbps, 2Mbps, 5.5Mbps, 11Mbps