About Domains

A domain is a group of devices on a network that share a common part of their IP addresses. A Fully Qualified Domain Name (FQDN) consists of a host name and a domain name, including a top-level domain. For example, www.yourdomain.com is a fully qualified domain name: "www" is the host, "yourdomain" is the second-level domain and ".com" is the top level domain.

An In-Sight sensor must have an FQDN to be configured or monitored through an In-Sight sensor or In-Sight emulator that is not part of the local network. The string entered in the Domain Name field of the Network Settings dialog or the Add Sensor/Device to Network dialog is appended to the string entered in the Host Name field to create an FQDN.

When the Use DHCP Server checkbox is selected, the domain field is shaded and displays the value assigned by the DHCP server.

FQDN Example

Consider a local domain named yourdomain.com:

If an In-Sight sensor's host name is is8402_010203, the FQDN for lookup is: is8402_010203.yourdomain.com