1 Stress echocardiogram: This is an echocardiogram that is performed while the person exercises on a treadmill or stationary bicycle. 2  This test can be used to visualize the motion of the heart's walls and pumping action when the heart is stressed.
Viruses require an active host program to cause damage and infect other executable files or documents, while worms are stand-alone malicious programs that can self-replicate and propagate via computer networks, without human help.
The simplest method for distributing malware is hidden inside files being shared on peer-to-peer (P2P) networks. Create and enforce a no-P2P policy, including home usage of a company machine. Enforce the policy at the gateway and, using SEPâs optional Application and Device Control (ADC) component, at the desktop.