CS 571 Operating Systems - GMU Computer Science
... • Program Counter (PC): contains the memory address of the next instruction to be fetched. ! • Stack Pointer (SP): points to the top of the current stack in memory. The stack contains one frame for each procedure that has been entered but not yet exited.! • Program Status Word (PSW): contains the ...
... • Program Counter (PC): contains the memory address of the next instruction to be fetched. ! • Stack Pointer (SP): points to the top of the current stack in memory. The stack contains one frame for each procedure that has been entered but not yet exited.! • Program Status Word (PSW): contains the ...
CPU-Scheduling
... • Provides reasonable response times and prevents the system being held up by processes in infinite loops. ...
... • Provides reasonable response times and prevents the system being held up by processes in infinite loops. ...
University of Tehran
... There is no single way to abstract physical resources or to implement an abstraction that is best for all applications. OS is forced to make trade-offs Performance improvements of application-specific policies could be substantial Univ. of Tehran ...
... There is no single way to abstract physical resources or to implement an abstraction that is best for all applications. OS is forced to make trade-offs Performance improvements of application-specific policies could be substantial Univ. of Tehran ...
macro virus - University of Windsor
... Malware, security tools and toolkits: • Malware : any piece of malicious software. • Security tools and toolkits : are designed to be used by security professionals to protect their sites. These can also be used by unauthorized individuals to probe for weaknesses. The purposes, not the approach, ma ...
... Malware, security tools and toolkits: • Malware : any piece of malicious software. • Security tools and toolkits : are designed to be used by security professionals to protect their sites. These can also be used by unauthorized individuals to probe for weaknesses. The purposes, not the approach, ma ...
Threats To Windows Users and Countermeasures
... W32SIRCAM worm, discovered in July 2001, which propagates via Microsoft Outlook email programs and comes in various attractive attachments loaded with personal files belonging to the victim and is a temptation to any users to open the attachment. Key fingerprint = AF19 FA27 2F94 998D FDB5 DE3D F8B5 ...
... W32SIRCAM worm, discovered in July 2001, which propagates via Microsoft Outlook email programs and comes in various attractive attachments loaded with personal files belonging to the victim and is a temptation to any users to open the attachment. Key fingerprint = AF19 FA27 2F94 998D FDB5 DE3D F8B5 ...
System Operating Limits
... Sample of facility ratings and underlying component data to demonstrate ratings were developed per FAC ...
... Sample of facility ratings and underlying component data to demonstrate ratings were developed per FAC ...
slides-13
... Kernel keeps state info for I/O components, including open file tables, network connections, character device state ...
... Kernel keeps state info for I/O components, including open file tables, network connections, character device state ...
Unix File System
... (Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7th Edition, Feb 6, 2005) ...
... (Silberschatz, Galvin and Gagne ©2005 Operating System Concepts – 7th Edition, Feb 6, 2005) ...
Unix Intro PowerPoint
... The /etc directory contains configuration files the system uses when the computer starts Most of this directory is reserved for the system administrator, and it contains systemcritical information stored in files: psswrd, the user database (passwd) rc, scripts or directories of scripts to run wh ...
... The /etc directory contains configuration files the system uses when the computer starts Most of this directory is reserved for the system administrator, and it contains systemcritical information stored in files: psswrd, the user database (passwd) rc, scripts or directories of scripts to run wh ...
tasks, threads and processes, confused?
... when required. Interrupt service routines (ISRs) are used to react to the asynchronous requests. When the ISR is invoked, due to a demand for service from an external peripheral, it pre-‐empts the back ...
... when required. Interrupt service routines (ISRs) are used to react to the asynchronous requests. When the ISR is invoked, due to a demand for service from an external peripheral, it pre-‐empts the back ...
PCI Compliance Without Compensating Controls – How to Take Ulf Mattsson
... Assign a unique ID to each person with computer access Restrict physical access to cardholder data ...
... Assign a unique ID to each person with computer access Restrict physical access to cardholder data ...
Chapter 13: I/O Systems Silberschatz, Galvin and Gagne ©2013! Edition!
... Characteristics of I/O Devices (Cont.) ■ Subtleties of devices handled by device drivers" ■ Broadly I/O devices can be grouped by the OS into" ...
... Characteristics of I/O Devices (Cont.) ■ Subtleties of devices handled by device drivers" ■ Broadly I/O devices can be grouped by the OS into" ...
Organizations That Use TLS/SSL
... TLS is a successor to Secure Sockets Layer protocol. TLS provides secure communications on the Internet for such things as e-mail, Internet faxing, and other data transfers. There are slight differences between SSL 3.0 and TLS 1.0, but the protocol remains substantially the same. It is good idea to ...
... TLS is a successor to Secure Sockets Layer protocol. TLS provides secure communications on the Internet for such things as e-mail, Internet faxing, and other data transfers. There are slight differences between SSL 3.0 and TLS 1.0, but the protocol remains substantially the same. It is good idea to ...
PDF - IBM Redbooks
... sites were used by attackers who exploited a user’s trust in the site. From legitimate looking spam containing malicious links to fraudulent emails appearing to be from friends, social media sites were used to both obtain information about users and as an initial access point into organizations. Att ...
... sites were used by attackers who exploited a user’s trust in the site. From legitimate looking spam containing malicious links to fraudulent emails appearing to be from friends, social media sites were used to both obtain information about users and as an initial access point into organizations. Att ...
Physical Security
... Network-Based IDSs (continued) • NIDSs examine the network traffic for suspicious or malicious activity. • Two examples illustrate the operation of NIDS: – Port scan – A port scan is a reconnaissance activity a potential attacker uses to find out information about the systems he wants to attack. – P ...
... Network-Based IDSs (continued) • NIDSs examine the network traffic for suspicious or malicious activity. • Two examples illustrate the operation of NIDS: – Port scan – A port scan is a reconnaissance activity a potential attacker uses to find out information about the systems he wants to attack. – P ...
Step 5: Securing Routing Protocols
... in systems and reports these so that they can be fixed. –Black hat - An individuals who use their knowledge to break into systems that they are not authorized to use. –Hacker - An individual that attempts to gain unauthorized access to network with malicious intent. –Cracker - Someone who tries to g ...
... in systems and reports these so that they can be fixed. –Black hat - An individuals who use their knowledge to break into systems that they are not authorized to use. –Hacker - An individual that attempts to gain unauthorized access to network with malicious intent. –Cracker - Someone who tries to g ...
Exploration CCNA4
... in systems and reports these so that they can be fixed. –Black hat - An individuals who use their knowledge to break into systems that they are not authorized to use. –Hacker - An individual that attempts to gain unauthorized access to network with malicious intent. –Cracker - Someone who tries to g ...
... in systems and reports these so that they can be fixed. –Black hat - An individuals who use their knowledge to break into systems that they are not authorized to use. –Hacker - An individual that attempts to gain unauthorized access to network with malicious intent. –Cracker - Someone who tries to g ...
Higher National Unit specification: general information Unit title
... Given the theoretical nature of this Unit, it is intended that a significant amount of time will be made available as a central part of the course for revision, tutorials and formative assessment exercises. Candidates should be strongly encouraged to undertake further reading, and opportunities for ...
... Given the theoretical nature of this Unit, it is intended that a significant amount of time will be made available as a central part of the course for revision, tutorials and formative assessment exercises. Candidates should be strongly encouraged to undertake further reading, and opportunities for ...
Process
... thread management is done in user space, so it is efficient Entire process will block if a thread makes a blocking call to the kernel Because only one thread can access kernel at a time, no parallelism on multiprocessors is possible ...
... thread management is done in user space, so it is efficient Entire process will block if a thread makes a blocking call to the kernel Because only one thread can access kernel at a time, no parallelism on multiprocessors is possible ...
Process
... thread management is done in user space, so it is efficient Entire process will block if a thread makes a blocking call to the kernel Because only one thread can access kernel at a time, no parallelism on multiprocessors is possible ...
... thread management is done in user space, so it is efficient Entire process will block if a thread makes a blocking call to the kernel Because only one thread can access kernel at a time, no parallelism on multiprocessors is possible ...
Chap 12
... Identify active detection and passive detection features of both host- and network-based IDS products continued… ...
... Identify active detection and passive detection features of both host- and network-based IDS products continued… ...
Operating-System Structures
... Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation Disk scheduling ...
... Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation Disk scheduling ...
ADAPTING BASE STATION OPERABILITY SOFTWARE INTO LINUX AND SYMMETRIC MULTIPROCESSOR ARCHITECTURE
... Scheduling is the practice of deciding how to commit resources between different processes and the way processes are assigned to run on the available Central Processing Units (CPUs). Scheduling is very important for BTS O&M SW. The software requires a correct-order execution of its several processes ...
... Scheduling is the practice of deciding how to commit resources between different processes and the way processes are assigned to run on the available Central Processing Units (CPUs). Scheduling is very important for BTS O&M SW. The software requires a correct-order execution of its several processes ...
Security Risks
... – IETF attempted to standardize • TLS (Transport Layer Security) protocol Network+ Guide to Networks, 6th Edition ...
... – IETF attempted to standardize • TLS (Transport Layer Security) protocol Network+ Guide to Networks, 6th Edition ...
Operating Systems
... memory control info, etc.) transparently to user process. Note on terminology. It’s common to use ‘process’ for task with independent address space, espec. in Unix setting, but this is not a universal definition. Tasks sharing the same address space are called ‘tasks’ (IBM) or ‘threads’ (Unix). But ...
... memory control info, etc.) transparently to user process. Note on terminology. It’s common to use ‘process’ for task with independent address space, espec. in Unix setting, but this is not a universal definition. Tasks sharing the same address space are called ‘tasks’ (IBM) or ‘threads’ (Unix). But ...