Layer 1 and 2 DoS Attacks

Denial of service at level 1 or 2 can take two forms.

The first is a physical denial of service - this would be something like radio jamming or snipped network cables. This is a physical means of preventing a sheep from connecting to a network or to other resources.

The second is at the router level, and consists of tampering with the CAM table, which maps MAC addresses to IP addresses. Technically, this is really a level 3 attack, but since I can't think of any purely Level 2 DoS attacks... there you go.