Users in a company have complained about network performance. After investigation, the IT staff has determined that the attacker injected false records on the server that translates IP addresses to domain names. What is the type of network attack?

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Question:
Users in a company have complained about network performance. After investigation, the IT staff has determined that the attacker injected false records on the server that translates IP addresses to domain names. What is the type of network attack?

DNS poisoning
SYN flood
DDoS
zero-day

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