Surveying common attack methods

- Security mechanisms and controls are needed…on multiple levels.…As without a layered approach, you could be a victim…of an attack.…Some attacks are passive such as sniffing or scanning,…and they are done because of a need to discover…information about a network.…Active attacks are designed to interrupt service,…destroy data, or steal information.…We see here a depiction of the seven layer OSI model.…There are attacks in virtually every layer of the OSI model.…

We'll take one more step and separate this,…and I'll just show you that the first two layers,…layer one and layer two, are essentially hardware attacks.…Layers three through seven are more directed…at software attacks.…The application layer.…The application layer is where we initiate contact…with the network.…Here we see software attacks.…This will exploit some weakness in the code.…Other examples would include phishing via email…or popups and malware such as viruses, spyware, trojans,…and worms.…

The presentation layer is where the data is presented for…