•The attacks that we look at today are in one of three categories and have the following goals:
		•Prevent another user from using a network connection
		•Disable a host or service
		•Monitor traffic
	•The reasons for these goals vary:
		•Usually the prevention of network, host, or service usability is a result of some revenge.
		•Monitoring traffic usually has two eventual goals:
			•New compromised accounts from which attacks can be staged
			•Espionage of some type, resulting in embarrassment or blackmail