virus, preforms what the creator wants it to ppreform not the intention of the original program.
Denial of Service, program, act as user, generates volume, crash the website
Firewalls distingui sh between internal and external traffic (Demititarization Zone)
Data at rest ismore secure than data at flight, encrypting data hides the daaata in a code, must have the same code to decrypt
HTTPs< --------- secure