Denial of Service (DoS) Attack
A type of attack that attempts to make an online service unavailable by flooding the target with more requests than it can handle, usually from a single source.
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Distributed Denial of Service (DDoS) Attack
A type of attack that attempts to make an online service unavailable by flooding the target with more requests than it can handle. Unlike a DoS attack that typically comes from a single source, in a DDoS attack attackers use multiple compromised devices to generate traffic from many sources simultaneously.
DNS cache poisoning
A technique that tricks a DNS server into believing it has received authentic information when, in reality, the information is false. Used to take unsuspecting victim to a malicious website.
DNS Spoofing
An attack technique where a hacker intercepts a system's requests to a DNS server in order to issue false responses as though they came from the real DNS server.