What is meant by the term "firewall sandwich"?()
- A、multiple layers of firewalling
- B、a method of operating firewalls from multiple vendors
- C、firewall connections in either an active or standby state
- D、an architecture in which all traffic between firewalls goes through application-specific servers
- E、an architecture in which all traffic between firewalls goes through application-specific gateways
正确答案:A
答案解析:有
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