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单选题
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
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Which two tasks are accomplished by the firewall filter shown in the exhibit?()
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What is the recommended practice when considering VPN termination and firewall placement?()
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考题
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考题
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questionC
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doubtB
questionC
wonderD
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