Vulnerability Scanning With Nessus

Next, you select the device, or devices, that you want to scan. You can input a single host name or IP address, or an IP address range. You can also use a comma-separated list to input a mass quantity of devices that aren't necessarily in the same IP range.

There is also a link to use the Address Book. Devices, or groups of devices, that you want to scan on a frequent or regular basis can be saved into the Nessus Address Book for future reference.