Page 14 - DCAP311_DCAP607_WIRELESS_NETWORKS

Wireless Networks

Notes Field Sales Can:

z z Sell more efficiently by not having to reenter data

z z Eliminate the need for return calls by solving customer needs on the spot
z z Trim redundant technologies and plans and ensure greater efficiency

1.3.8 Vending

A wireless vending machine system based on the GSM network is developed in this paper. First
of all, several methods by which we may realize wireless data communication of GSM network
are analyzed and compared, the overall structure of vending machine system based on USSD is
given an in-depth introduction. Furthermore, control modules which realize data transmission
and control function of terminal device, middleware which connects application and BOSS
(business operation support system), and transaction software embedded in USSD platform,
are also developed respectively. Finally, the operating support system of wireless vending
machine system is formed, which can not only integrate vending machines, USSD platform and
payment system together, but also manage sale information, logistic information and consumer
information on-line. The vending machine system presented in the paper has been put into use
in several provinces and cities for more than two years. All performance indexes of the system
are satisfying

1.3.9 Public Networks

Public WiFi ‘hotspots’ in places like cafés, airports, hotels and libraries are convenient but unlike
your home computer you don’t know what security these networks have or who else may be
connected.
Wireless enabled laptops or smartphones allow you to easily connect to the internet no matter
where you are. The increasing availability of public WiFi ‘hotspots’ make getting using them to
get online simple.
These networks are often not secured and are there is likely to be other people using them at the
same time. There is a risk that another user on the network could monitor your activity, steal
your data or infect your computer with malicious software.

Notes Because of the added risks you should take additional care about what you do
online.

Top tips

z z Be careful about which hotspots you use. Avoid using hotspots that are run by people
you don’t know or trust. Criminals can set up hotspots known as ‘evil twins’ and ‘rogue
hotspots’ to steal users’ information.
z z Install and use anti-virus, anti-spyware and firewall software. Keep them activated and
up-to-date.
z z Make sure no-one is watching you. By simply looking over your shoulder, someone could
steal personal information.

z z If you can’t connect securely using a VPN, then consider avoiding online banking or
shopping. You should also avoid any sites that require you to enter passwords or sending
confidential email.

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