> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/cortex-xpanse/learn-about-cortex-xpanse/scanning/scanning-cadences.md).

# Scanning cadences

Cortex Xpanse scans the internet to discover new services at varying cadences depending on several factors such as port, protocol, cloud provider ranges, and customer-attributed assets. All responsive services are monitored regularly.

Below is a list of our targeted scanning cadences:

* **Discovery Scans**
  * **Global Base**— twice per week discovery of approximately 250 of the most common ports on all IPv4 space.
  * **Global Extended**—low background rate discovery of the remaining 65k ports, excluding those covered in KAM base and KAM extended.
  * **KAM (Known Assets Monitoring) Base**—daily discovery of approximately 300 of the most common ports on customer-attributed assets.
  * **KAM Extended**—weekly discovery of approximately 2800 of the most common ports on customer-attributed assets. These do not overlap with KAM Base.
* **Monitoring Scans**
  * Daily on all responsive services.
* **Attack Surface Testing Scans**
  * Daily on configured services.


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