Multiple different ( ) cannot be added to the same interface on the firewall at the same time (fill in the blank)

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Which of the following statements about firewalls is correct?

• A.The firewall cannot transparently access the network.
• B.Adding a firewall to the network will inevitably change the topology of the network.
• C.Depending on the usage scenario, the firewall can be deployed in a transparent mode or a three-bedroom type.
• D.To avoid a single point of failure, the firewall only supports bypass deployment

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In the TCP/P protocol core, which of the following protocols works at the application layer? ( )[Multiple choice]*

• A.ICMP
• B.ARP
• C.RIP
• D.IGMP

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Which of the following is not asymmetric encryption algorithm?

• A.RSA
• B.DSA
• C.DH
• D.MD5

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In the classification of the information security level protection system, which of the following levels defines if the information system is damaged, it will cause damage to social order and public interests?

• A.The first level: user self-protection
• B.The second level: system audit protection
• C.The third level: security mark protection
• D.The fourth level: structured protection

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