Unit 11
... • unauthorized traffic saturates a network’s resources, restricting access for legitimate users • typical: flood servers with data packets ...
... • unauthorized traffic saturates a network’s resources, restricting access for legitimate users • typical: flood servers with data packets ...
CST1215 Operating System Fundamentals
... 11. Identify the roles of system measurement tools such as positive and negative feedback loops. 12. Identify system monitoring techniques. 13. Identify advantages and disadvantages of MS-DOS including basic commands. 14. Demonstrate proficiency with the OS Command Line of Windows and Linux which in ...
... 11. Identify the roles of system measurement tools such as positive and negative feedback loops. 12. Identify system monitoring techniques. 13. Identify advantages and disadvantages of MS-DOS including basic commands. 14. Demonstrate proficiency with the OS Command Line of Windows and Linux which in ...
Threat Briefing - (AFCEA) Ottawa Chapter
... This fast growing opportunity for capital and operational savings presents increasing benefits for organizations of all sizes. Whether as an internal initiative or as an out-sourced model, virtualization and cloud computing present new and complex security questions that can lead to huge vulnerabili ...
... This fast growing opportunity for capital and operational savings presents increasing benefits for organizations of all sizes. Whether as an internal initiative or as an out-sourced model, virtualization and cloud computing present new and complex security questions that can lead to huge vulnerabili ...
Introduction to Object Technology
... • View the system as a series of levels • Each level performs a related subset of functions • Each level relies on the next lower level to perform more primitive functions • This decomposes a problem into a number of more manageable ...
... • View the system as a series of levels • Each level performs a related subset of functions • Each level relies on the next lower level to perform more primitive functions • This decomposes a problem into a number of more manageable ...
interrupt - Universidade de Coimbra
... Each talks to the others over known interfaces Each is loadable as needed within the kernel ...
... Each talks to the others over known interfaces Each is loadable as needed within the kernel ...
LECT03
... the OS rotates its various jobs in and out of execution via time-sharing o Each job gets a predetermined “time slice” o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
... the OS rotates its various jobs in and out of execution via time-sharing o Each job gets a predetermined “time slice” o At end of time slice current job is set aside and a new one starts o By rapidly shuffling jobs, illusion of several jobs executing simultaneously is created ...
attacks
... The process of using social skills to persuade people to reveal access credentials or other valuable information. ◦ Over the phone: “Hey, Joe, this is Andy from department C. Aaron (the boss) told me to ask you to give me the XYZ plans, the customers is demanding we fix the bugs by tomorrow. “ ◦ Ove ...
... The process of using social skills to persuade people to reveal access credentials or other valuable information. ◦ Over the phone: “Hey, Joe, this is Andy from department C. Aaron (the boss) told me to ask you to give me the XYZ plans, the customers is demanding we fix the bugs by tomorrow. “ ◦ Ove ...
No Slide Title
... “Naked machine” Hardware without any helpful user-oriented features Extremely difficult for a human to work with ...
... “Naked machine” Hardware without any helpful user-oriented features Extremely difficult for a human to work with ...
Book cover slide
... Novell Netware Novell’s NetWare OS is different from other OS in that it is technically a network operating system. NetWare can run on any hardware, including Macintosh, UNIX, and Windows-based computers. ...
... Novell Netware Novell’s NetWare OS is different from other OS in that it is technically a network operating system. NetWare can run on any hardware, including Macintosh, UNIX, and Windows-based computers. ...
Operating Systems - arabunityschool.com
... There are a number of operating systems that you could use on your computer. The one that you are most likely to be familiar with is one of the Microsoft Windows operating systems. Almost all personal computers are loaded with Windows before you purchase them and most schools use a network version. ...
... There are a number of operating systems that you could use on your computer. The one that you are most likely to be familiar with is one of the Microsoft Windows operating systems. Almost all personal computers are loaded with Windows before you purchase them and most schools use a network version. ...
Review: Operating Systems - Nipissing University Word
... Understand a number of basic design principles in computer security. Demonstrate an understanding of the importance of security models with reference to the security of computer systems. Describe the features and security mechanisms which are generally used to implement security policies. Provide ex ...
... Understand a number of basic design principles in computer security. Demonstrate an understanding of the importance of security models with reference to the security of computer systems. Describe the features and security mechanisms which are generally used to implement security policies. Provide ex ...
Computer Security
... Used by OS and applications Owner of the resource determines which subjects can access Subjects can pass permissions to others Owner is usually the creator and has full control Less secure than mandatory access ...
... Used by OS and applications Owner of the resource determines which subjects can access Subjects can pass permissions to others Owner is usually the creator and has full control Less secure than mandatory access ...
Operating System Overview
... was written out to secondary store and the successor proceess was read in ...
... was written out to secondary store and the successor proceess was read in ...
lec01 - CSE @ UCR
... owns the machine and shares resources while making them seem better than they are Beautician that hides all the ugly low level details so that anyone can use a machine (e.g., smartphone!) Referee that arbitrates the available resources between the running programs efficiently, safely, fairly, and se ...
... owns the machine and shares resources while making them seem better than they are Beautician that hides all the ugly low level details so that anyone can use a machine (e.g., smartphone!) Referee that arbitrates the available resources between the running programs efficiently, safely, fairly, and se ...
CS 153 Design of Operating Systems
... Interactive time sharing: let many people use the same machine at the same time Emergence of minicomputers ...
... Interactive time sharing: let many people use the same machine at the same time Emergence of minicomputers ...
IPSec (IP Security)
... protection for upper-layer protocols end-to-end, between two hosts encryption of payload only authenticaton of payload + header (only AH) ...
... protection for upper-layer protocols end-to-end, between two hosts encryption of payload only authenticaton of payload + header (only AH) ...
1.2 Operating System Structure
... • Virtual Machine OS is to support concurrent execution of different operating system on a computer . • The resources of the physical computer are shared to create the virtual machines. – CPU scheduling can create the appearance that users have their own processor. – Spooling and a file system can p ...
... • Virtual Machine OS is to support concurrent execution of different operating system on a computer . • The resources of the physical computer are shared to create the virtual machines. – CPU scheduling can create the appearance that users have their own processor. – Spooling and a file system can p ...
Public Presentation - Academic Conferences
... SW subversion steals credit/debit card data “an ‘illicit and unauthorized computer program’ was secretly installed at every one of its 300-plus stores.” – Hannaford Bros. Co., reported on eWeek.com, March 28, 2008 ...
... SW subversion steals credit/debit card data “an ‘illicit and unauthorized computer program’ was secretly installed at every one of its 300-plus stores.” – Hannaford Bros. Co., reported on eWeek.com, March 28, 2008 ...
system call.
... The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execut ...
... The CPU is multiplexed among several jobs that are kept in memory and on disk (the CPU is allocated to a job only if the job is in memory). A job swapped in and out of memory to the disk. On-line communication between the user and the system is provided; when the operating system finishes the execut ...
PPT
... • a desire to bring order to systems software development to manage complexity, bugs, correctness etc. ...
... • a desire to bring order to systems software development to manage complexity, bugs, correctness etc. ...
Course Overview, History
... – Overlaps I/O processing of a job with computation of another – Benefits from I/O devices that can operate asynchronously – Requires the use of interrupts and DMA – Optimizes for throughput at the cost of response time ...
... – Overlaps I/O processing of a job with computation of another – Benefits from I/O devices that can operate asynchronously – Requires the use of interrupts and DMA – Optimizes for throughput at the cost of response time ...
Lecture 1: Operating System Services What is an Operating System?
... Scheduling: The system has to decide when to introduce new processes into the system and the order in which processes should run. Resource Allocation: When there are multiple process running concurrently, resources must be allocated to each one of them. Example: A compiler. A tape unit. Memory. ...
... Scheduling: The system has to decide when to introduce new processes into the system and the order in which processes should run. Resource Allocation: When there are multiple process running concurrently, resources must be allocated to each one of them. Example: A compiler. A tape unit. Memory. ...
CNCERT/CC Annual Report 2008
... In 2008, CNCERT/CC monitored some popular Trojans and discovered 565,605 IP addresses of computers embedded with Trojans in Chinese mainland, which decreased by 43.2% compared with that of year 2007. CNCERT/CC also kept on monitoring Botnet activities for a long time. In 2008, CNCERT/CC discovered o ...
... In 2008, CNCERT/CC monitored some popular Trojans and discovered 565,605 IP addresses of computers embedded with Trojans in Chinese mainland, which decreased by 43.2% compared with that of year 2007. CNCERT/CC also kept on monitoring Botnet activities for a long time. In 2008, CNCERT/CC discovered o ...
OPERATING SYSTEM FUNCTIONS
... In computing, the kernel is the main component of most computer operating systems; it is a bridge between applications and the actual data processing done at the hardware level. The kernel's responsibilities include managing the system's resources (the communication between hardware and software com ...
... In computing, the kernel is the main component of most computer operating systems; it is a bridge between applications and the actual data processing done at the hardware level. The kernel's responsibilities include managing the system's resources (the communication between hardware and software com ...