Which network firewall operates up to Layer 4 (Transport layer) of the OSI model and maintains information about the communication sessions which have been established between hosts on trusted and untrusted networks?
I'm a bit confused; I thought Static packet-filter firewalls also worked at Layer 4, but they don't maintain session info like Stateful ones do, right?
This is a classic exam question, testing our understanding of conditional logic. I'm confident I can nail this one - I just need to take my time and carefully evaluate each option.
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