> #### Discovering network resources

> You can use Fathom to determine whether a particular machine is available.

> To discover network resources:

> 1. Select Resources from the menu bar. The Fathom Resources page appears.
> 2. Click Discover Network Resources. The Discover Network Resources page appears:

> 3. Enter values in the Starting Address and Ending Address fields to identify a range of Internet Protocol (IP) addresses you want Fathom to PING. This activity enables Fathom to discover machine and port information.
> To simplify your entries in the Starting Address and Ending Address fields, Fathom provides the first two fields of your local host in each of these entries. In the example shown in Step 2, the value 172.16. appears in each of these fields. To enter a valid starting address, you must append these partially provided values with the remaining two fields.

> Both the Starting Address and the Ending Address must begin with the same values.

> 4. Click Discover. Depending on the number of resources Fathom must PING (and the corresponding time it takes to perform this activity), the Discovery Status page appears:

> The Discovery Status page displays and updates the status of the discovery process as resources and ports associated with the IP addresses are scanned. PING information obtained for active resources, and UDP and TCP ports that are discovered to be active, are reported and updated on this page approximately every three seconds.

> Once the discovery process ends, the Discovery Results page appears:

> The following details about discovered resources are returned and displayed if a machine is available:

> - TCP and/or UDP port data.
> - Machine name.

> The icon that displays next to a discovered resource indicates whether the resource is a TCP port, a UDP port, or an ICMP resource.

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