Users in a company have complained about network performance. After investigation, the IT staff has determined that the DNS server was sent with an enormous amount of false requests, thus overwhelming the server. 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 DNS server was sent with an enormous amount of false requests, thus overwhelming the server. What is the type of network attack?

DoS
zero-day
SYN flood
dictionary

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