What type of attack is characterized by sending a large amount of DNS queries to a server to overwhelm it?

The type of attack characterized by sending a large number of DNS queries to overwhelm a server is known as a DNS Flood Attack. This type of attack specifically targets the Domain Name System (DNS) servers by inundating them with requests, which can cause them to slow down or become unresponsive.

A DNS Flood Attack aims to overload the server by consuming its resources, leading to denial of service for legitimate users trying to access DNS queries. The primary goal of such an attack is to disrupt the normal functioning of the server and prevent it from responding to legitimate queries. This aligns closely with the overall concept of denial-of-service attacks, where the intent is to disrupt the service of a system.

While a general DoS Attack can encompass various types, including DNS Flood Attacks, the specific terminology for this scenario aligns with the first option, which directly identifies the nature of the attack on DNS services. Understanding this distinction helps clarify the specific protocols and vulnerabilities associated with various types of attacks.