Two possible situations make you want to take a look at the users information in your local area network (LAN):
The speed of Internet connection becomes slower and slower, and it was no use giving many tries like modifying DNS, optimizing network
To check whether there is a potential attacker
This time, we can use Wireless Network Watcher - a tiny and free local wireless/wired network connection scanner & viewer from NirSoft.
People using notebook generally access a wireless network with password, then the operating system will automatically save them after we enter the WiFi password and have the wireless network successfully connected for the first time. The problem is that, over time, most of us are likely to forget or lose the password. In this case, once other devices need to access the same wireless network, finding the password back can be a troublesome thing.
Now WiFi network has covered almost every corner in our life. That means, every smartphone user may need to connect to different WiFi networks in different places. As a result, accurately remembering these unlike WiFi passwords has become a problem. In another case, when you need to reconnect to or connect a new device to some wireless network and you just forgot the password, to get the password once more is also a trouble thing. I guess you would not like to ask somebody else or the network administrator for the password every time. In such cases, a tiny and handy mobile app can make things much easier.
With the development of mobile devices and network, intelligent mobile phone has become a new paradise for hackers. Imagine, under this environment of everybody holds a smart phone nowadays, nothing is more active than the mobile phone viruses and the vulnerabilities' exploits of software and mobile network. Therefore, to understand and master some practical security tools seems necessary and meaningful.
Today, all laptops come with wireless network adapter. At the same time, the huge convenience of wireless network is obvious. But since it is subject to technical bottleneck, the stability and quality of wireless network always can't catch up with wired network. That is to say, the most annoying thing when using a wireless network is the poor signal, especially you don't know which one is better.
WifiInfoView is a tiny and handy free app written by the world famous independent developer Nir Sofer for quickly scanning, viewing and analyzing all possible information about the wireless networks searchable (available) near your location.
If someone says you want to use this kind of tool to verify the security of passwords or recover them, that would be a joke, I think. After all, a rule for secure enough password is very simple - Uppercase + Lowercase + Number+ Symbol (and > 8 characters), there is no need of any tool to validate it at all. The same for wireless network password, restoring it is meaningless - just reset the router to default, which is the most efficient way. So, obviously they are designed for passwords cracking only.