A mechanism of the PCI standard where the target of a data transfer is given the ability to terminate a data transfer between it and the bus master if the target device monopolizes the bus due to slow access time. Access time is measured in clock cycles, and the target will abort the data transfer once a predetermined number of clock cycles has been exceeded. The initial data transfer is allowed 16 clock cycles, and subsequent data transfers are allowed eight clock cycles. The target device will also terminate the transfer if it detects a collision on the bus. After the transfer has been terminated, the target device will issue a retry request to the PCI bus master.
- targeted attack
In computer and network security terminology, a targeted attack is one that has been aimed at a specific user, company or organization. These attacks are not widespread, but rather are designed to attack and breech a specific target.
An operating system concept that refers to the combination of a program being executed and bookkeeping information used by the operating system. Whenever you execute a program, the operating system creates a new task for it. The task is like an envelope for the program: it identifies the program with a task number and attaches […]
A technique used by spammers to slow down the transmission rate of unsolicited emails (spam) that are sent in bulk. For example, If the spammer has 10,000 emails to send, they may send the messages in groups of 25 at a time adding a delay in an SMTP communication between mail servers. When delaying the […]
- task switching
Refers to operating systems or operating environments that enable you to switch from one program to another without losing your spot in the first program. Many utilities are available that add task switching to DOS systems. Note that task switching is not the same as multitasking. In multitasking, the CPU switches back and forth quickly […]
In GUI interfaces, the taskbar is a desktop toolbar application that lets you perform tasks such as switching between open windows and starting new applications. The taskbar is usually associated with the Microsoft Windows interface.