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<em>The audience for your security assessment report (SAR) is the leadership of your company, which is made up of technical and nontechnical staff. Some of your audience will be unfamiliar with operating systems. Therefore, you will begin your report with a brief explanation of OS fundamentals and the types of information systems. </em>
Read the following resources that provide essential information you need to know before creating a thorough and accurate OS explanation:
- Operating systems fundamentals
An operating system is the fundamental software which is needed to run a hardware every electronic hardware need an instruction set to make the hardware working. We can say that operating system is communication medium between the user as well other software to the hardware. Hardware don’t know the language of user and user don’t know the language of hardware how to give instructions to the hardware to perform some specific task so Operating system do this functionality to meet the needs of both user and hardware.
- The applications of the OS
Applications of operating system are following
- Security
Operating system make sure that all the user data is secured and an unauthorize source cannot access the computer to make any changes in user data or any other program.
- Communication b/w application software and user
The other application of operating system is that it provides a communication channel b/w user and other application program by using some sort of compilers, interpreter to meet the user needs.
- File Management
Operating system also provide an essential feature of managing files. It provides complete directory and easy navigation of files and their usage access. It keeps track that where the information is stored and all other details that thing is known as file system.
- Device Management
Operating system also keep track of all the devices connected to it install their respective device drivers if available and make them available. OS do communication with the devices connected to it and then perform instructions via hardware and allocate which instruction set should be assign to which device.
- Processor Management
OS control the multitasking feature of the processor. It makes an order of list of all the tasks which need to be done on processor and assign them according to there priority and also manage for how much time that task is assigned to the processor.
- Error Detecting
OS keep track of all the information of the health of the computer and detect errors if available to avoid malfunctioning of the computer.
- The Embedded OS
Embedded operating system are specially designed operating system which are used to for special purpose hardware/embedded system. These OS are more efficient than the simple OS and have limited features. They are designed to be compact and resource efficient. It perform real time operations and very responsive to the instructions. In our daily life ATM machine have an embedded OS, smart phones also have and in medical like MRI machine.
- Information system architecture
The information system is defined as formal definition of the business processes, product technologies and working system structure and other technical framework for a business organization. Information system architecture have four layers “Business Process Architecture”, “System Architecture”, “Technical Architecture” and “Product Architecture”.
Information system architecture consist of the software and hardware used to meet the consumer needs. It consists of a documented detail of software hardware used and networked and future plan to add some other features if needed to upgrade or change the system.
- Cloud computing
Cloud computing is defined as on demand availability of computer resources over the network/internet like storage, software or processing without using the current system all the work is done on a system far away which is available on internet and can be accessed from anywhere. For such services there are data centers which store data on servers to make them available to there user.
Cloud computing have some types like SaaS (Software as service), Storage, Database, Security, Platform as service.
