PRTG Network Monitor is a LAN monitor that helps you stay on top of everything that happens in your company network. LAN monitoring includes not only checking for outages of network devices but also monitoring network performance and usage of network resources.
A LAN monitor is essential to monitoring network activity and ensuring the success of your company and the security of your organization's information. PRTG is a network and server monitor that can automatically detect and respond to threats and performance issues in real time, as well as help prevent possible issues in the future.
PRTG uses SNMP, Packet Sniffing and NetFlow monitoring.
However, PRTG is more than a LAN Network Monitor. Apart from monitoring servers and workstations in your local area network, PRTG can also monitor devices in your WAN (wide area network) or in another networks using remote probes.
PRTG Lan Network Monitor is available in two editions. For basic, free bandwidth tracking functionality, the Freeware Edition may be downloaded and used for personal and commercial use completely free of charge. For more advanced needs, licenses for the Commercial Editions start at $380 / €250.
Apart from PRTG LAN Monitor, Paessler offers also stress and performance test freeware.