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Share some HCNP-Security H12-721-ENU exam questions and answers below.
A data flow has established session in the firewall, if modifing the packet filtering strategy corresponding to data, how does firewall implement? 
A. When a new packet arrives at the firewall, immediately follow the latest policy to filter and refresh the session table 
B. Immediately follow the latest strategy to perform filtering, do not refresh the session table. 
C. Before session aging, do not perform new strategy, match according to the previously established session 
D. The modification will fail, after clearing the session, and then can modify. 
Answer: A

In the IPsec VPN, which of the following statement about the difference between the aggressive mode and the main mode is wrong? 
A. Main mode does not support NAT traversal in pre-shared key mode, while aggressive mode supports. 
B. The negotiation message of main mode is 6, and the aggressive mode is 3. 
C. In NAT traversal scenario, the peer ID cannot use an IP address. 
D. The main mode encrypts the exchange of identity information, while the aggressive mode does not encrypt identity information. 
Answer: C

About the type of virtual gateway, exclusive and shared type, which of the following statements are correct? (Select three answers) 
A. exclusive virtual gateway exclusive IP address. 
B. When the network IP address is tight, it is recommended to use shared virtual gateway. 
C. Exclusive virtual gateway can use domain name to access. 
D. Multiple shared virtual gateways, through the IP address to distinguish. 
Answer: ABC

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