Eavesdropping Attack
(Release of Message Contents)

Data Modification Attack
(Modification of Messages)

IP, MAC, DHCP Spoofing Attack
(Masquerade)

Password-Based Attacks

Denial-of-Service Attacks

Man-in-the-Middle Attack

Compromised-Key Attack

Sniffer Attack

Password Attack

Trust Exploitation

Port Redirection

Buffer Overflow

Pretexting

Phishing

Spear Phishing

Tailgating

Something for Something
(Quid pro quo)

Baiting

Maliciously Formatted Packets

Overwhelming Quantity of Traffic

Ping of Death
(legacy)

Smurf Attack
(legacy)

TCP SYN Flood Attack

Distributed DoS Attack
(DDoS)