The monitor tree organizes all groups, gateways, assets and monitors managed by Network Monitor. Using the tree you can quickly browse to any asset and monitor.
Gateways - A gateway monitors assets sharing the same subnet. For a standard install of Network Monitor there is only one Local gateway and it refers to the same network the Network Monitor server is installed on.
Groups - Used to group other nodes on the monitor tree. Groups do not correspond to a physical asset on a network. Think of them as representing logical business units, such as companies or departments, or a set of assets within a network.
A node cannot be the child of more than one parent. This includes a suggroup node.
Groups can have sub-groups.
Groups can be added above or below a gateway.
Assets - Anything with an IP address. This includes computers, routers, switchers, mobile devices, printers, firewalls, etc.
Monitors - A monitor runs a specific test on an asset and reports the result back to the server. An asset can have multiple monitors.