This is one IP scanner that both network administrators will appreciate because it does a simple but important job with minimum fuss. Free IP Scanner can scan hundreds of computers per second which is ideal for administrators. The developers claim that it can do this by virtue of its multi-thread scan technology. It pings each IP address to see if its is responding and then resolves the hostname, scans ports, etc.
Free IP scanner can also display NetBIOS information: host name, workgroup, currently logged user and MAC addresses. The information obtained can be exported into a file as a plain text file which is useful if you have to log the number and IP details of each PC on your network. Free IP Scanner doesn't require any installation or additional DLLs - you simply execute it from it's own folder and it will run immediately.
This is an incredibly quick and powerful program and should be in any network administrators toolbox.