Rebecca returned the Packet-filtering Firewall that she bought to control the data that can flow into and out of a network. Instead, Rebecca went and bought the fifth-generation firewall that creates dynamic, customized TCP/IP stacks when a packet needs to be evaluated. What firewall did Rebecca purchase?
Explanation
Answer: B - The fifth-generation that creates dynamic, customized TCP/IP stacks when a packet need to be evaluated is the Kernel proxy firewall. When a packet arrives at a kernel proxy firewall, a new virtual network sack is created, which is made up of only the protocol proxies necessary to examine this specific packet properly. The kernel proxy firewalls are faster than application-layer proxy firewalls because all of the inspection and processing takes place in the kernel and does not need to be passed up to a higher software layer in the operating system. It is still a proxy-based system, so the connection between the internal and external entity is broken by the proxy acting as a middleman and it can perform NAT by changing the source address, as do the preceding proxy-based firewalls.
