A virtual device driver (VxD) is a software device driver that emulates hardware and other devices so that multiple applications running in protected mode can access hardware interrupt channels, hardware resources and memory without causing conflicts. The Vxd was superseded by the Windows Driver Model (WDM) and is now obsolete.
Spam over Internet Telephony (SPIT) refers to the undesired, automated, pre-recorded, bulk telephone calls made using the Voice over Internet Protocol (VoIP). SPIT is almost like email spam, but causes even more disturbance to victims given that the spam is in the form of a phone call. This term is also known as VOIP spam.
VoIP platforms are vulnerable to unsolicited SPIT from telemarketers, system abusers and pranksters. Like privacy options set by chat software and email systems, VOIP systems can also make use of similar measures to prevent SPIT. Some countermeasures include:
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