Which of the following is not the scope of business of the National Internet Emergency Center?

• A.Early warning notification of security incidents
• B.Cooperate with other agencies to provide training services
• C.Emergency handling of security incidents
• D.Providing security evaluation services for government departments, enterprises and institutions

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Which of the following is correct about firewall IPSec policy?

• A.By default, IPSec policy can control unicast packets and broadcast packets.
• B.By default, IPSec policy only controls unicast packets.
• C.By default, IPSec policy can control multicast.
• D.By default, IPSec policy can control unicast packets, broadcast packets, and multicast packets 。

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Which of the following is the encryption technology used by digital envelopes?

• A.Hash algorithm
• B.Stream encryption algorithm
• C.Asymmetric encryption algorithm
• D.Symmetric encryption algorithm

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HRP (Huawei Redundancy Protocol) Protocol to backup the connection state of data include: (Multiple Choice)

• A.the routing table
• B.the dynamic blacklist
• C.TCP/UDP sessions table
• D.Ser/er Map table

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Which of the following are the basic functions of anti-virus software? (Multiple Choice)

• A.Defend virus
• B.Find virus
• C.Copy virus
• D.Clear virus

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