Do all firewalls provide packet filtering?

Greetings everyone:

I continue to see posts on WHT that appear to state firewalls and packet filtering are two separate entities (services, software, etc.).

Yet from all our security experiences, all firewalls provide packet filtering.

Are there firewalls that don't provide packet filtering?

Would you have cases where they are two separate services et all?

Thank you.

 

 

 

 

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