B. static-packet filtering
C. series circuit
D. stateful inspection
Answer from the SearchSecurity.com glossary:
"Stateful inspection provides enhanced security by keeping track of communications packets over a period of time. Both incoming and outgoing packets are examined. Outgoing packets that request specific types of incoming packets are tracked; only those incoming packets constituting a proper response are allowed through the firewall. In contrast to static packet filtering, in which only the headers of packets are checked, stateful inspection analyzes packets down to the Application layer."
- Stateful-inspection firewalls cannot protect networks from all attacks.
- Stateful-inspection firewalls are just one type that should be considered when choosing a firewall.
- Find out which firewalls were recognized by Information Security magazine as Products of the Year in 2004.