System Call - KOVAN Research Lab
... Windows NT uses “modified microkernel”: • Monolithic kernel for most things, OS APIs (DOS, Win3.1, Win32, POSIX) implemented as user-level services Mac OS X has reincarnated the microkernel architecture as well: • Gnarly hybrid of Mach (microkernel) and FreeBSD (monolithic) ...
... Windows NT uses “modified microkernel”: • Monolithic kernel for most things, OS APIs (DOS, Win3.1, Win32, POSIX) implemented as user-level services Mac OS X has reincarnated the microkernel architecture as well: • Gnarly hybrid of Mach (microkernel) and FreeBSD (monolithic) ...
Test1
... In the class, we did explore the peer-to-peer systems vis-à-vis the client-server systems. Explain the way they do differ from each other. Briefly evaluate each system from (a) performance, and, (b) the security points of view. Give examples of I/O bound and CPU bound applications. If one wants to o ...
... In the class, we did explore the peer-to-peer systems vis-à-vis the client-server systems. Explain the way they do differ from each other. Briefly evaluate each system from (a) performance, and, (b) the security points of view. Give examples of I/O bound and CPU bound applications. If one wants to o ...
PCS 105 ADVANCED OPERATING SYSTEM Course Objective: Introduction:
... PCS 105 ADVANCED OPERATING SYSTEM L ...
... PCS 105 ADVANCED OPERATING SYSTEM L ...
Networking Operating Systems (CO32010)
... concepts involved with operating systems, such as the basic definition involved in computer systems. Processes and Scheduling. This unit outlines some of the key concepts in the operation of an operating system, especially related to processes, and scheduling. Distributed Processing. This units outl ...
... concepts involved with operating systems, such as the basic definition involved in computer systems. Processes and Scheduling. This unit outlines some of the key concepts in the operation of an operating system, especially related to processes, and scheduling. Distributed Processing. This units outl ...
Operating System Overview Operating System
... • Responsible for managing resources • An OS is just a program that is executed ...
... • Responsible for managing resources • An OS is just a program that is executed ...
The Taidoor Campaign: An In-Depth Analysis
... honeypot. The attackers issued out some basic commands in an attempt to map out the extent of the network compromise but quickly realized that the honeypot was not an intended targeted and so promptly disabled the Taidoor malware running on it. This indicated that while Taidoor malware were more wid ...
... honeypot. The attackers issued out some basic commands in an attempt to map out the extent of the network compromise but quickly realized that the honeypot was not an intended targeted and so promptly disabled the Taidoor malware running on it. This indicated that while Taidoor malware were more wid ...
Abstract View of System Components
... Improves “ease of computing” Increase customer base by 100x or more Increase “sharing” --- need for resource management and protection ...
... Improves “ease of computing” Increase customer base by 100x or more Increase “sharing” --- need for resource management and protection ...
Figure 6-1
... the beginning of the first packet that enables the entire packet to be reassembled by the receiving system. In the teardrop attack, the attacker's IP puts a confusing offset value in the second or later fragment. If the receiving operating system does not have a plan for this situation, it can cause ...
... the beginning of the first packet that enables the entire packet to be reassembled by the receiving system. In the teardrop attack, the attacker's IP puts a confusing offset value in the second or later fragment. If the receiving operating system does not have a plan for this situation, it can cause ...
ppt - Fordham University
... • Protection – any mechanism for controlling access of processes or users to resources defined by the OS • Security – defense of the system against internal and external attacks – Huge range, including denial-of-service, worms, viruses, identity theft, theft of service ...
... • Protection – any mechanism for controlling access of processes or users to resources defined by the OS • Security – defense of the system against internal and external attacks – Huge range, including denial-of-service, worms, viruses, identity theft, theft of service ...
presentation3
... “automatic” installation of clients This means that all the questions that are asked by the installation process must be answered on a text file or “script” that can be accessed during the automatic install – with Windows 2000/3 this is known as ...
... “automatic” installation of clients This means that all the questions that are asked by the installation process must be answered on a text file or “script” that can be accessed during the automatic install – with Windows 2000/3 this is known as ...
11.4 Software Operating Systems
... the OS has to switch between different processes thousands of times a second making sure that each process and application receives enough of the processor's time to function properly. ...
... the OS has to switch between different processes thousands of times a second making sure that each process and application receives enough of the processor's time to function properly. ...
Windows Server 2008
... • When a partition is created, information about that partition is stored in a special area of the disk known as the partition table (in MS-DOS, Mac OS, and Windows) and disk label (in UNIX/Linux) • Another piece of disk that is reserved is known as the boot block in UNIX/Linux and Mac OS X, or the ...
... • When a partition is created, information about that partition is stored in a special area of the disk known as the partition table (in MS-DOS, Mac OS, and Windows) and disk label (in UNIX/Linux) • Another piece of disk that is reserved is known as the boot block in UNIX/Linux and Mac OS X, or the ...
20121101
... – Very tiny footprint – Gives attacker complete control over the system – Set in reverse-connect mode. System reaches out to get commands. Fairly standard method of getting through firewalls/IPS ...
... – Very tiny footprint – Gives attacker complete control over the system – Set in reverse-connect mode. System reaches out to get commands. Fairly standard method of getting through firewalls/IPS ...
Patterns for Operating Systems Access Control
... The subjects can be users, roles, and groups by proper specialization of class Subject. Roles and groups can be structured recursively [Fer01]; i.e. there can be role and group hierarchies that permit more flexibility in the assignment of rights. The protection objects can be single files, directori ...
... The subjects can be users, roles, and groups by proper specialization of class Subject. Roles and groups can be structured recursively [Fer01]; i.e. there can be role and group hierarchies that permit more flexibility in the assignment of rights. The protection objects can be single files, directori ...
CIT 016 Review for Final
... Operating systems are intended to be dynamic As users’ needs change, new hardware is introduced, and more sophisticated attacks are unleashed, operating systems must be updated on a regular basis However, vendors release a new version of an operating system every two to four years Vendors use certai ...
... Operating systems are intended to be dynamic As users’ needs change, new hardware is introduced, and more sophisticated attacks are unleashed, operating systems must be updated on a regular basis However, vendors release a new version of an operating system every two to four years Vendors use certai ...
Introduction
... Pages of address space distributed among four machines Situation after CPU 1 references page 10 Situation if page 10 is read only and replication is used ...
... Pages of address space distributed among four machines Situation after CPU 1 references page 10 Situation if page 10 is read only and replication is used ...
William Stallings Computer Organization and Architecture
... Multi-programming allows a number of users to interact with the computer ...
... Multi-programming allows a number of users to interact with the computer ...
CSS430: Introduction - UW Faculty Web Server
... Each user has at least one separate program in memory. A program in execution is referred to as a process. Process switch occur so frequently that the users can interact with each program while it is running. File system allows users to access data and program interactively. CSS430 Introduction ...
... Each user has at least one separate program in memory. A program in execution is referred to as a process. Process switch occur so frequently that the users can interact with each program while it is running. File system allows users to access data and program interactively. CSS430 Introduction ...
from Plan BeII Labs .
... 3. The Command-Level Vew plan 9 is meant to be used from a machine with a screen running the window system. It has no notion of 'teletype' in the UNIX sense. The keyboard hant/2 [Pike dling of the bare system is rudimentary, but once the window system, 8 19911, is running, text can be edited with 'c ...
... 3. The Command-Level Vew plan 9 is meant to be used from a machine with a screen running the window system. It has no notion of 'teletype' in the UNIX sense. The keyboard hant/2 [Pike dling of the bare system is rudimentary, but once the window system, 8 19911, is running, text can be edited with 'c ...
How to Prevent Unauthorized Access to Laser Beam Printers and
... This guide is intended for use by network administrators, dealers and other business customers. In order to get the most from this guide, you should have an understanding of: ...
... This guide is intended for use by network administrators, dealers and other business customers. In order to get the most from this guide, you should have an understanding of: ...
CENG334 Introduction to Operating Systems
... Sometimes implemented in kernel, sometimes by systems programs Sometimes multiple flavors implemented – shells Primarily fetches a command from user and executes it Sometimes commands built-in, sometimes just names of programs ...
... Sometimes implemented in kernel, sometimes by systems programs Sometimes multiple flavors implemented – shells Primarily fetches a command from user and executes it Sometimes commands built-in, sometimes just names of programs ...
Hands-On Ethical Hacking and Network Security
... Patching Systems Some patches cause problems, so they should be tested first Options for patch management for large networks ...
... Patching Systems Some patches cause problems, so they should be tested first Options for patch management for large networks ...