Which of the following statement is wrong about the L2TP VPN of Client-Initialized?

• A.After the remote user access the Internet, the L2TP tunnel connection request can be initiated directly from the remote LNS through the client software.
• B.The LNS device receives the user's L2TP connection request, and the user can be verified according to the username and password.
• C.The remote users do not need to install VPN client software
• D.LNS assign private IP addresses for remote users.

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According to the level protection requirements, which of the following behaviors belong to the scope of information security operation and maintenance management? ( )*

• A.Backup or restore data
• B.Participate in information security training
• C.Security hardening of the host
• D.Develop an emergency response plan

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Which of the following NAT technologies can implement a public network address to provide source address translation for multiple private network addresses ( )*

• A.NAT No-PAT
• B.NAPT
• C.NAT Server
• D.Easy-ip
  CT Jinglu

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Regarding the description of the ARP spoofing attack, which of the following is wrong?

• A.ARP spoofing attacks can only be achieved through ARP responses, not through ARP requests
• B.ARP static binding is a solution to ARP spoofing attacks, mainly used in scenarios where the network scale is not big
• C.When a host sends a normal ARP request, the attacker will preemptively answer, causing the host to establish a wrong IP and MAC mapping relationship
• D.The ARP implementation mechanism only considers normal business interactions, and does not do any verification for abnormal business interactions or malicious behaviors

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What are the correct options for the following description of the basic concepts of LDAP?

• A.Directory Information Tree DIT: A collection of attributes constitutes a Directory Information Tree.
• B.Attribute: The attribute describes the characteristics of the object. An attribute consists of an attribute type and one or more attribute values.
• C.Relative Distinguished Name RDN, the name of the entry, uniquely identifies child entries of the same parent entry
• D.Unique identifier DN, the name that uniquely identifies an entry in a directory information tree

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