When considering the design of the E-Commerce topology which of the following are true?

When considering the design of the E-Commerce topology which of the following are true?
A . One-armed SLB design with multiple security contexts removes the need for a separate firewall in the core layer
B . Two-firewall-layer SLB design considers the aggregation and access layers to be trusted zones, requiring no security between the web, application, and database zones
C . One-armed SLB design with two firewall layers ensures that non load-balanced traffic still traverses the ACE so that the health and performance of the servers is still being monitored
D . In all cases there will be configuration requirements for direct access to any servers or for nonload-balanced sessions initiated by the servers

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Answer: A