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# Properties That Affect the Behavior of Rich Internet Applications

The following properties can be specified in a rich Internet application's JNLP file to control the behavior of the rich Internet application (RIA - applet and Java Web Start applications).

Property | Allowed Value | Description
--- | --- | ---
`javaws.cfg.jauthenticator` | true / false | A value of "true" or "all" prevents Java Web Start software from installing the default `JAuthenticator`.
`jnlp.concurrentDownloads` | integer | Number of threads for concurrent download of JAR files
`jnlp.packEnabled` | true / false | A value of "true" indicates that the application's JAR files have been compressed using the Pack200 tool. See Pack200 and Version Download for more information.
`jnlp.versionEnabled` | true / false | A value of "true" indicates that the application's JAR files have been versioned to enable the version download protocol. See Pack200 and Version Download for more information.

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