What is an advantage in using a packet filtering firewall versus a high-end firewall appliance?

What is an advantage in using a packet filtering firewall versus a high-end firewall appliance?

• Packet filters perform almost all the tasks of a high-end firewall at a fraction of the cost.
• Packet filters represent a complete firewall solution.
• Packet filters are not susceptible to IP spoofing.
• Packet filters provide an initial degree of security at the data-link and network layer.
  

  Answers Explanation & Hints: There are several advantages of using a packet filtering firewall: – ​allows for implementing simple permit or deny rule sets. – has a low impact on network performance – is easy to implement, and is supported by most routers – provides an initial degree of security at the network layer – performs almost all the tasks of a high-end firewall at a much lower cost