Juniper JNCIS-SEC JN0-335 Question # 1 Topic 1 Discussion

 The error occurred because the “http” application is not defined in this context of Juniper SRX Series device configuration. One solution is to create a custom application named “http” at the [edit applications] hierarchy level (Option C). Another solution is to modify the security policy to use the built-in “junos-http” application which is predefined and doesn’t need an explicit definition (Option D). Options A and B are not correct because they do not address the root cause of the error, which is the undefined application “http”. References: The answers can be verified from Juniper’s official documentation on security policies and applications available on their website. Here are some relevant links:

Security Policies Feature Guide for Security Devices

Understanding Applications and Application Sets for SRX Series Devices

Configuring Custom Applications for SRX Series Devices

Predefined Applications for SRX Series Devices