Revision Viruses (Gerardo E)

Viruses can spread on both stand-alone systems and networked systems. On stand-alone systems, viruses typically spread via removable media like floppy disks or USB drives. On networked systems, viruses most commonly propagate by exploiting shared network resources and searching for vulnerable systems, often spreading through email attachments containing macro viruses. There are several types of viruses that can affect networked systems, including worms that spread without human intervention, sentinels that allow remote control of infected systems, and Trojan horse viruses that disguise malicious payloads.