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13 Cards in this Set
- Front
- Back
- 3rd side (hint)
Multitasking |
Handling two or more tasks simoultaneously |
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Multicore |
Most CPU are multicore. Single CPU or microprocessor chip is now a chip containing two , four, eight or potentially dozens of independent execution cores that can operate simoultaneously. |
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Multiprocessing |
Computing system that is , one with more than one CPU. |
For example, a database server might run on a system that contains four, six or more processor. If the database receives a number of separate queries simultaneously, it might send each query to a separate processor for execution. |
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Symmetric multiprocessing |
Single computer contains multiple processors that are treated equally and controlled by a single operating system. |
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Massively parallel processing(MPP) |
Holds hundreds or even thousands of processor, each of which has its own operating system and memory/ bus resources. |
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Multiprogramming |
Is similar to multitasking. Multiple processes in line, wait for each other until their state is saved and the next process in line begins to process. Multitasking: coordinated by the operating system Multiprogramming: requires specially written software . |
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Multithreading |
Permits multiple concurrent tasks to be performed with in a single process. |
Unlike multitasking: where multiple tasks occupy multiple processes. |
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Single state |
Handle one security level at a time |
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Multistate |
Handle multiple security levels simultaneously.
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Protection Mechanisms |
Protection rings, operational states, and security modes. |
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Protection Rings |
Organize code and components in an operating system.
The innermost ring 0 , has the highest level of privilege . |
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Process states / operating states |
Various forms of execution in which a process may run. Ready: a process is ready to resume or begin processing as soon as it is schedule for execution. Waiting: waiting for resource Running/ problem state: executes on the CPU and keeps going until it finishes, it's time slice expires or it is blocked for some reason. Supervisory: is used when the process must perform an action that requires privileges. Stopped: a process finishes or must be terminated. |
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Security Modes |
Dedicated Mode: each user must have a security clearance , access approval and a valid need to know for all information processed.
System High Mode: each user must have a valid security clearance , access approval and a valid need to know for all information processed.
Difference b/w dedicated Mode and the system high mode: users do not necessarily have a need to know for all information processed on a system high mode computing device.
Difference between compartmented mode system and system high mode: that users of a compartmented mode system do not necessarily have access approval for all the information on the system. |
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