Marketing assigment

Sure, you can outsource some of this stuff, but as the business owner, you still need to be the one in charge and you need to know how all this works.

Marketing assigment

Trends in MVS Security: This article was first written inupdated in November,and updated again in July of MVS has been the environment for which the best-known and most widely used security products have been developed, and it has influenced our thinking about security for all computer systems.

But MVS security is not a static concept; it is a moving target on which security product vendors and infosecurity professionals must keep focused. Data security officers need to understand the history of MVS security, and they should be aware of the recent developments.

This takes on greater importance since the mainframe is not dying or going away.

Marketing assigment

The Gartner Group calculates that the cost per user and cost per transaction is often lower on a mainframe Marketing assigment on other platforms. It is relatively easy to demonstrate that MVS provides the most secure and most reliable version of: In discussing MVS security, five basic ideas should be kept in mind: The different protective tools available with MVS are all inter-related.

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A weakness in one undermines the security of them all. Security tools have evolved in response to the increasing complexity of the operating system, including the number and type of users and programs supported.

This complexity also includes the increasing number of system software components. The security provided by these tools is based on two basic questions: Each security tool addresses at least one of these questions. As tools increased in sophistication, they have relied less on hardware controls, and more on software controls.

This has required more attention and greater effort by security administrators to ensure that security tools are used rigorously and consistently. As more types of hardware and software are interconnected including: When this is not well understood, security officers may not be informed of changes in a timely fashion, and they may not be able to provide adequate, efficient control.

To provide comprehensive computer security, it is important to understand the different security features available to MVS systems and how they fit together: Security Through Hardware MVS's evolution may be viewed in several stages, each of which was built upon its predecessors and upon basic hardware controls to support computer security.

Since only one job or program could execute at a time, there was no need to prevent one program from interfering with another.


In this sense, one of the earliest controls was isolation - that is, allowing only one program to execute at a time. In addition, PCP relied on two basic hardware controls to prevent programs from interfering with the operating system itself.

These were supervisor state and protect keys. When it is on in supervisor stateprograms can execute any instruction given them. When the switch is off the problem program statehowever, programs cannot execute privileged instructions - such as sending a command to a tape drive to start reading data.

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As a general rule, MVS reserves supervisor state for itself, causing all application programs to execute in problem program state. Any time a program needs some powerful function, it must issue a supervisor call instruction to request the operating system to perform it.

For example, to read data in from a tape drive, a program must issue a supervisor call instruction to request MVS to tell the tape drive to perform the read. MVS will execute the necessary privileged instructions, but only after performing various checks to make sure the program should be allowed to read from that tape drive.

After issuing or denying the requested commands, MVS returns control to the application program in problem program state.

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IBM has provided several ways for application programs to obtain supervisor state:Popplet is the best app for sharing visual ideas.

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Marketing assigment

The Marketing Minute is a short two-to-four minute presentation of a marketing concept for which each student will be assigned and scheduled.

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