Introduction to Operating System
... Software that controls a computer and acts as a layer between the hardware and the applications and users. (eg. ...
... Software that controls a computer and acts as a layer between the hardware and the applications and users. (eg. ...
Lecture7
... The server maintains a cache of recently used files in memory reading and writing from/cache whenever possible. How should we use multithreading in this case: (a) one thread per process or (b) multiple threads per process. The server maintains a large buffer space and allows a user process to read a ...
... The server maintains a cache of recently used files in memory reading and writing from/cache whenever possible. How should we use multithreading in this case: (a) one thread per process or (b) multiple threads per process. The server maintains a large buffer space and allows a user process to read a ...
BackDoors
... Password Cracking Backdoor One of the first and oldest methods of intruders used to gain not only access to a Unix machine but backdoors was to run a password cracker. This uncovers weak passworded accounts. All these new accounts are now possible backdoors into a machine even if the system adminis ...
... Password Cracking Backdoor One of the first and oldest methods of intruders used to gain not only access to a Unix machine but backdoors was to run a password cracker. This uncovers weak passworded accounts. All these new accounts are now possible backdoors into a machine even if the system adminis ...
A: Process termination requires reclaim of any reusable resources
... Files and software that are affected by system restore System Restore will undo programs and applications that have been installed since the Restore Point, but data files such as documents, spreadsheets or music MP3's will not be touched. When to do system restore? If you notice that your computer i ...
... Files and software that are affected by system restore System Restore will undo programs and applications that have been installed since the Restore Point, but data files such as documents, spreadsheets or music MP3's will not be touched. When to do system restore? If you notice that your computer i ...
Chapter 10: Electronic Commerce Security
... Is a computer with anti-virus software protected from viruses? Why or why not? What are the differences between encryption and authentication? Discuss the role of administration in implementing a security policy? ...
... Is a computer with anti-virus software protected from viruses? Why or why not? What are the differences between encryption and authentication? Discuss the role of administration in implementing a security policy? ...
Welcome to NETS3304/3604 Operating System Internals
... Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware among various applications and users Application programs – define the ways in which the system resources are used to solve the computing problems of the users ...
... Hardware – provides basic computing resources CPU, memory, I/O devices Operating system Controls and coordinates use of hardware among various applications and users Application programs – define the ways in which the system resources are used to solve the computing problems of the users ...
The Need for Security
... Explores the contents of a web browser’s cache Allows a Web designer to create a malicious form of cookie that is stored on the client’s system Cookie allow designer to collect information on how to access password protected sites ...
... Explores the contents of a web browser’s cache Allows a Web designer to create a malicious form of cookie that is stored on the client’s system Cookie allow designer to collect information on how to access password protected sites ...
What is a Network
... communications for an extranet community of buyers and suppliers, but VPNs are also used to secure many other types of communication – those internal to a company and links between different companies or agencies for information sharing, for example. The most common definition of an extranet is a ty ...
... communications for an extranet community of buyers and suppliers, but VPNs are also used to secure many other types of communication – those internal to a company and links between different companies or agencies for information sharing, for example. The most common definition of an extranet is a ty ...
Introduction
... individual node to support a large virtual address space. • Having data belonging to two independent processes in the same page is called false sharing. – If a page contains data of two independent processes on different processors, the operating system may need to repeatedly transfer the page betwe ...
... individual node to support a large virtual address space. • Having data belonging to two independent processes in the same page is called false sharing. – If a page contains data of two independent processes on different processors, the operating system may need to repeatedly transfer the page betwe ...
Operating Systems Review
... _____ and _____ commands. a) cut, paste b) copy, paste c) file, open 5. When _____ , a computer performs two or more procedures or programs at the same time. a) threading b) task switching c) multitasking 6. Software programs that allow the operating system and applications to use specific hardware ...
... _____ and _____ commands. a) cut, paste b) copy, paste c) file, open 5. When _____ , a computer performs two or more procedures or programs at the same time. a) threading b) task switching c) multitasking 6. Software programs that allow the operating system and applications to use specific hardware ...
Network Components
... Assures that all work stations will access Problem if there are many workstations ...
... Assures that all work stations will access Problem if there are many workstations ...
Introduction and Overview - Pages
... Code is complex and poorly understood • System outlives any of its builders • System will always contain bugs • Behavior is hard to predict, tuning is done by guessing ...
... Code is complex and poorly understood • System outlives any of its builders • System will always contain bugs • Behavior is hard to predict, tuning is done by guessing ...
Install the Operating System
... The Windows Task Scheduler launches tasks at a specified time ...
... The Windows Task Scheduler launches tasks at a specified time ...
oslecture2
... Allocate and deallocate memory to processes. Managing multiple processes within memory - keep track of which parts of memory are used by which processes. Manage the sharing of memory between processes. Determining which processes to load when memory ...
... Allocate and deallocate memory to processes. Managing multiple processes within memory - keep track of which parts of memory are used by which processes. Manage the sharing of memory between processes. Determining which processes to load when memory ...
Page 1 Operating System Users and User Programs Hardware
... • OS must ensure that a user program could never gain control of the computer in monitor mode (i.e. a user program that, as part of its execution, stores a new address in the interrupt vector, or the memory location where OS is residing) ...
... • OS must ensure that a user program could never gain control of the computer in monitor mode (i.e. a user program that, as part of its execution, stores a new address in the interrupt vector, or the memory location where OS is residing) ...
& inside: THE MAGAZINE OF USENIX & SAGE
... applications. LOMAC uses the Low Water Mark model of protection, which applies well to UNIX systems. It partitions both files and processes into high and low levels. The high level contains critical portions of the system such as init, libraries, and configuration files. The low level is made up of ...
... applications. LOMAC uses the Low Water Mark model of protection, which applies well to UNIX systems. It partitions both files and processes into high and low levels. The high level contains critical portions of the system such as init, libraries, and configuration files. The low level is made up of ...
gst_115_9
... PC card connections are pretty common these days and are typically used for connecting a laptop to a network. These cards are about the size of a credit card and only three or four times thicker. The card slides into a PC card slot on the computer and usually has some type of special cable that allo ...
... PC card connections are pretty common these days and are typically used for connecting a laptop to a network. These cards are about the size of a credit card and only three or four times thicker. The card slides into a PC card slot on the computer and usually has some type of special cable that allo ...
Ch06-Firewalls
... – Misfeasor: a legitimate user who performs actions he is not authorized to do – Clandestine user: a user who tries to block or cover up his actions by deleting audit files and/or system logs ...
... – Misfeasor: a legitimate user who performs actions he is not authorized to do – Clandestine user: a user who tries to block or cover up his actions by deleting audit files and/or system logs ...
Chapter 2 Operating System Overview
... • Virtual address is a page number and an offset within the page • Each page may be located anywhere in main memory • Real address or physical address is the main memory address ...
... • Virtual address is a page number and an offset within the page • Each page may be located anywhere in main memory • Real address or physical address is the main memory address ...
System
... • Start by defining goals and specifications • Affected by choice of hardware, type of system • User goals and System goals – User goals – operating system should be convenient to use, easy to learn, reliable, safe, and fast – System goals – operating system should be easy to design, implement, and ...
... • Start by defining goals and specifications • Affected by choice of hardware, type of system • User goals and System goals – User goals – operating system should be convenient to use, easy to learn, reliable, safe, and fast – System goals – operating system should be easy to design, implement, and ...
Operating Systems
... software, the system requirements will identify the required platform to run the software. A cross-platform program is one that runs the same on multiple operating systems. ...
... software, the system requirements will identify the required platform to run the software. A cross-platform program is one that runs the same on multiple operating systems. ...
Operating Systems
... software, the system requirements will identify the required platform to run the software. A cross-platform program is one that runs the same on multiple operating systems. ...
... software, the system requirements will identify the required platform to run the software. A cross-platform program is one that runs the same on multiple operating systems. ...
Introduction
... A system is described scalable if remain effective when there is a significant increase in the number of resources and users Date 1979, Dec. 1989, July 1999, July ...
... A system is described scalable if remain effective when there is a significant increase in the number of resources and users Date 1979, Dec. 1989, July 1999, July ...
TNS03%20Introduction%20to%20Network%20Security
... might be designed to provide remote access to the system via a “back door”. Some may sit and wait to perform actions as instructed remotely, such as collecting and sending keystrokes captured by a keylogger program running in the background. ...
... might be designed to provide remote access to the system via a “back door”. Some may sit and wait to perform actions as instructed remotely, such as collecting and sending keystrokes captured by a keylogger program running in the background. ...