F
firewall

A tool used to filter traffic so that only specific traffic is allowed into or out of a network or into or out of a specific system. Network-based firewalls filter traffic into or out of a network and are usually a combination of hardware and software. A host-based firewall filters traffic into or out of a specific system and is software based.

function

A type of command that can be executed with PowerShell or PowerShell scripts. A PowerShell function will accept parameters and return values.

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