Nmap,orNetworkMapper,isafree,opensourcetoolthatisavailableundertheGNUGeneralPublicLicenseaspublishedbytheFreeSoftwareFoundation.ItismostoftenusedbynetworkadministratorsandITsecurityprofessionalstoscancorporatenetworks,lookingforlivehosts,specificservices,orspecificoperatingsystems.