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Firewall product capable for stateful packet filtering?

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What is the difference between a packet filter firewall and a packet filtering firewall?
A Packet filter firewall uses Filter hook driver for its basic working
What is the difference between packet filters stateful firewalls and application layers firewalls?
Stateful firewall checks more than just the ACK flag;it inspects the sequence numbers to ensure the correct state of the TCP session.
What is the difference between stateful packet inspection firewalls and network address translation?
These are two different things: Stateful packet inspection is a firewalling technology where a record is kept of each session permitted through the firewall and then data is permitted back through...
What is the difference between static packet filter firewall operation and stateful firewall?
Search for SPI and Firewall in Google. You don't find static packet firewalls anymore. A Cisco router does this kind of filtering in an Access List, the Cisco firewalls are SPI type.
What is stateful packet inspection?
Incoming packets must be legitimate responses to requests from internal hosts. Unsolicited packets are blocked unless permitted specifically. SPI can also include the capability to recognize and...