Regarding defense against DoS attacks, which of the following statements is incorrect?

Regarding defense against DoS attacks, which of the following statements is incorrect?
A . Anti-DoS attack refers to the system’s defense measures against DoS attacks by restricting the reception of protocol packets sent by users.
B . For users who initiate DoS attacks, the port/ONTGemport where the user is located will be added to the blacklist. For blacklisted users, the system administrator can force the user to log off the line
C . In a DoS attack, the attacker looks for an entry point into the internal network and uses the attack to prevent legitimate users from accessing resources or routers.
D . DoS (Denial of Service) attack refers to a malicious user sending a large number of protocol packets to attack the system, causing the system to be unable to process the service requests of normal users, that is, denying service to normal users.

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Answer: C