Against Buffer overflow attacks, which description is correct?(Multiple choice)

• A.Buffer overflow attack is use of the software system on memory operating defects, by using high operating permission to run attack code
• B.Buffer overflow attack is the most common method of attack software system's behaviors
• C.Buffer overflow attack has nothing to do with operating system's vulnerabilities and architecture
• D.Buffer overflow attack belongs to the application layer attack behavior

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Regarding the relationship and role of VRRP/VGMP/HRP, which of the following statements are correct? (Multiple choice)

• A.HRP is responsible for data backup during hot standby operation.
• B.VGMP is responsible for monitoring equipment failures and controlling fast switching of equipment.
• C.VRRP is responsible for sending free ARP to direct traffic to the new primary device during active/standby switchover.
• D.VGMP group in the active state may include the VRRP group in the standby state.

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As shown, when configuring the point-to-multipoint scenarios, the headquarters network segment is
10.1.1.0/24, the segment of branch 1 is 10.1.2.0/24, of branch 2 is 10.1.3.0/24.
About the protected data flow configuration which defined by headquarters and branch offices, which of the following combinations can be the full matched requirements?

• A.1 2 4 6
• B.3 4 5 6
• C.1 2 3 5
• D.1 2

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IPSec VPN uses an asymmetric encryption algorithm to encrypt the transmitted data

• A.False
• B.True

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IPSec VPN technology does not support NAT traversal when encapsulating with ESP security protocol, because ESP encrypts the packet header

• A.False
• B.True

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