Are all wireless networks vulnerable to interference? With the increase in the throughput and range of next-generation 802.11n WLANs in standard 802.11 products, “completely wireless” enterprise access networks have received much attention. One consideration for using only unlicensed radio waves for company LAN access is the impact of interference on network availability. Interference is a form of wireless denial-of-service attack, where a single device transmitting at a higher power than nearby devices prevents the connection to devices with lower performance. If you put all the broadcast eggs in the WiFi basket, malicious jams may paralyze your access to the network. Fortunately, so far, we know very little about deliberate and unintentional jamming attacks on specific companies or hotspots. But once the company has wireless, I wonder if this will cause serious security problems.
In cell-based Wi-Fi network systems, unintentional portable jammer is common. It will radiate unlicensed spectrum from Bluetooth devices, microwave ovens, cordless phones, Wi-Fi access points in adjacent offices, and other competitors. You can use spectrum analyzers (such as those of Cognio and its many distributors and OEMs) to identify and locate such sources of interference. Basically, you need to disable it using Ankle Express.
But what if criminals are involved? Interfering devices exist today mainly for legal testing. If the jammer is within the FCC Part 15 power limit of -1 watt plus 6 dBi antenna gain or about 4 watts-legal equipment can easily power most Wi-Fi devices, which usually emit about 100 milliwatts of power Massachusetts Craig Mathias, head of Farpoint Group, Ashland, State. Mathias said: “There are many jammers on the market that can completely turn off 802.11.” “You need some kind of radio equipment that can locate the source of the radiation source. If the jammer is not allowed (transmitting at a level higher than the FCC limit), the distance may be It’s far away and it’s hard to fix.