Hi @MohanKumar1 the logical equivalent of that would be the "XDR Content Updates", commonly referred to as CU's. You can check the corresponding CU's for an agent via the Endpoint Administration page.
You can modify the CU updates based on your Agent settings (see brief explanation here).
xdr agent can perform packet inspection in its own fw (dont take it as a full featured FW as our NGFW) in the link that my colleague @bbarmanroy sent you can see at the end of the features list the packet inspection.
Also realize that we can gather your network traffic and analyse it on the cloud not just with signatures, better than that we perform ML and detect malicious traffic from new attacks that will not be detected by standard signatured based IDS. All this signatures and intelligence is maintained by PANW, you dont need to worry about them.
Please check out these two docs:
Hope this helps also.
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