Although many people like to rely on their laptop computer to detect available wireless networks at a particular location, devices known as WiFi sniffers were created specifically to capture this information. The basic premise being that before someone goes to the trouble of starting up their computer, they can verify that there is indeed a compatible and available wireless broadband network in the area.
WiFi sniffers are available both as stand-alone, hard-top items and as software add-on applications for a person's portable wireless devices. Many of these add-on applications for smartphones and PDAs are free of charge; as the penetration of portable wireless devices has increased, it has rendered hard-top WiFi sniffers obsolete for all but the most specialized of IT personnel.
Some companies have banned WiFi sniffer software and applications that have the capability to randomly scan for available networks. These plug-ins, also known as stumblers, were removed in favor of authorized directory-based applications. Both free and fee-based directory applications and plug-ins are commonly available.
In today's ultra-competitive, user-review driven Internet environment, much online discussion is now focused on which of these add-on WiFi sniffers are the best at doing the sniffing. WiFi sniffer reviews are readily available on online tech websites and social media platforms; users are quick to share their opinion about an add-on's effectiveness as soon as they have tried it.
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