Assertion: firewall's type | /r/HasProperty | stateful filters
Facets:
Source sentences:
text: Various types of firewalls that can be used are Packet-Filters, Stateful Filters and Application Proxy Filters.
text: The different types of network firewalls are packet filtering firewalls, circuit-level gateways, stateful inspection firewalls, application or proxy firewalls, and next-generation firewalls.