Please enjoy this encore of Word Notes. A layer seven firewall designed to block threats at the application layer of the open system interconnection model, the OSI model. CyberWire Glossary link: ⁠https://thecyberwire.com/glossary/web-application-firewall⁠Audio reference link: “VCF East 9.1 - Ches' Computer Security Adventures - Bill Cheswick.” YouTube, 29 Dec. 2015, ⁠https://youtu.be/trR1cuBtcPs⁠.