Cardenas_Claudia_WorkShopSlides
... In terms of the PHY layer most of these attacks can be counteracted by using different signals and proper configuration of the protocol. Some of MAC flaws have been fixed by the enhanced security of IEEE 802.16e but not all of them. The lack of encryption of MAC management messages that can affect t ...
... In terms of the PHY layer most of these attacks can be counteracted by using different signals and proper configuration of the protocol. Some of MAC flaws have been fixed by the enhanced security of IEEE 802.16e but not all of them. The lack of encryption of MAC management messages that can affect t ...
OS-level Virtualization and Its Applications - ECSL
... virtualized service. To identify malicious web sites that exploit browser vulnerabilities, we use a web crawler to access untrusted sites, render their pages with browsers running in VMs, and monitor their execution behaviors. To allow Windows desktop to share binaries that are centrally stored, man ...
... virtualized service. To identify malicious web sites that exploit browser vulnerabilities, we use a web crawler to access untrusted sites, render their pages with browsers running in VMs, and monitor their execution behaviors. To allow Windows desktop to share binaries that are centrally stored, man ...
Project 2, Linux Kernel Hacking
... May be called from (almost) anywhere in kernel Same calling convention as printf() Writes to system log Output survives crashes (almost all of the time) ...
... May be called from (almost) anywhere in kernel Same calling convention as printf() Writes to system log Output survives crashes (almost all of the time) ...
Module 7: Process Synchronization
... Java Synchronization ■ Synchronized class methods Every Java object has an associated lock. ■ If lock is held by another thread, entering thread is queued on entry set. ■ Java provides wait() and notify(), similar to wait() and signal(). ■ Java 5 provides semaphores, condition variables, and mu ...
... Java Synchronization ■ Synchronized class methods Every Java object has an associated lock. ■ If lock is held by another thread, entering thread is queued on entry set. ■ Java provides wait() and notify(), similar to wait() and signal(). ■ Java 5 provides semaphores, condition variables, and mu ...
A Survey of BGP Security: Issues and Solutions
... ▫ Eg: Florida ISP 1997, Turkey TTNet 2004, ConEdision 2006, Pakistan Telecom 2008 ...
... ▫ Eg: Florida ISP 1997, Turkey TTNet 2004, ConEdision 2006, Pakistan Telecom 2008 ...
Operating Systems - Computer Society Of India
... mobile sets so near to us that had changed everyday life in this 21st Century. Operating systems are required in the department of defense in their submarines operating outside the territory of the home government, as well as in the department of atomic energy in their nuclear projects secured in a ...
... mobile sets so near to us that had changed everyday life in this 21st Century. Operating systems are required in the department of defense in their submarines operating outside the territory of the home government, as well as in the department of atomic energy in their nuclear projects secured in a ...
Hands-On Ethical Hacking and Network Defense Second Edition
... • Corporate buildings – May have many embedded systems • Firewalls, switches, routers, Web-filtering appliances, network attached storage devices, etc. ...
... • Corporate buildings – May have many embedded systems • Firewalls, switches, routers, Web-filtering appliances, network attached storage devices, etc. ...
9781435486096_PPT_ch09
... • Corporate buildings – May have many embedded systems • Firewalls, switches, routers, Web-filtering appliances, network attached storage devices, etc. ...
... • Corporate buildings – May have many embedded systems • Firewalls, switches, routers, Web-filtering appliances, network attached storage devices, etc. ...
The Abstraction: The Process
... The OS creates this illusion by virtualizing the CPU. By running one process, then stopping it and running another, and so forth, the OS can promote the illusion that many virtual CPUs exist when in fact there is only one physical CPU (or a few). This basic technique, known as time sharing of the CP ...
... The OS creates this illusion by virtualizing the CPU. By running one process, then stopping it and running another, and so forth, the OS can promote the illusion that many virtual CPUs exist when in fact there is only one physical CPU (or a few). This basic technique, known as time sharing of the CP ...
Chapter 3 Process Description and Control
... both main and secondary memory. • Must include this information: – Allocation of main memory to processes – Allocation of secondary memory to processes – Protection attributes for access to shared memory regions – Information needed to manage virtual memory ...
... both main and secondary memory. • Must include this information: – Allocation of main memory to processes – Allocation of secondary memory to processes – Protection attributes for access to shared memory regions – Information needed to manage virtual memory ...
Lecture 1 - The Laboratory for Advanced Systems Research
... – Alternate times or make-ups only possible with prior consent of the instructor ...
... – Alternate times or make-ups only possible with prior consent of the instructor ...
Chapter 5
... • Kxx link in /etc/init.d/rccurrentrl.d/ and Sxx link in /etc/init.d/rcnewrl.d/ for the same service – Script in /etc/init.d/ is not called at all • Kxx link in /etc/init.d/rccurrentrl.d/ and no Sxx link in /etc/init.d/rcnewrl.d/ – Stop script in /etc/init.d/service • Sxx link in /etc/init.d/rcnewrl ...
... • Kxx link in /etc/init.d/rccurrentrl.d/ and Sxx link in /etc/init.d/rcnewrl.d/ for the same service – Script in /etc/init.d/ is not called at all • Kxx link in /etc/init.d/rccurrentrl.d/ and no Sxx link in /etc/init.d/rcnewrl.d/ – Stop script in /etc/init.d/service • Sxx link in /etc/init.d/rcnewrl ...
Scheduling
... Give each process one equal CPU time. Interrupt every 10 msec and then selecting another in a round-robin fashion. Works if processes are compute-bound. What if a process gives up some of its 10 ms to wait for input? How long should the quantum be? is 10 msec the right answer? Shorter quantum => bet ...
... Give each process one equal CPU time. Interrupt every 10 msec and then selecting another in a round-robin fashion. Works if processes are compute-bound. What if a process gives up some of its 10 ms to wait for input? How long should the quantum be? is 10 msec the right answer? Shorter quantum => bet ...
Chapter 3 Process Description and Control Major
... • Process creation in Unix is made by means of the kernel system call, fork() • When a process issues a fork request, the OS: – Allocates a slot in the process table for the new process; – Assigns a unique process ID to the child process; – Makes a copy of the process image of the parent, with the e ...
... • Process creation in Unix is made by means of the kernel system call, fork() • When a process issues a fork request, the OS: – Allocates a slot in the process table for the new process; – Assigns a unique process ID to the child process; – Makes a copy of the process image of the parent, with the e ...
Lesson 1 Computers and Operating Systems PPT
... Personal Computer Operating Systems (continued) Linux is a personal computer operating system related to UNIX, which is an operating system developed in the late 1960s that is frequently used by scientists and programmers. Linux is released to the public as open-source software, meaning anyone c ...
... Personal Computer Operating Systems (continued) Linux is a personal computer operating system related to UNIX, which is an operating system developed in the late 1960s that is frequently used by scientists and programmers. Linux is released to the public as open-source software, meaning anyone c ...
Comparative Operating Systems Fall 2001 An Examination of
... sophisticated, highly reputable operating system for desktop PC's and servers. Since Linux is so well accepted, and free with open source code, it is no wonder that embedded developers have begun to look for ways to incorporate it into their devices. ...
... sophisticated, highly reputable operating system for desktop PC's and servers. Since Linux is so well accepted, and free with open source code, it is no wonder that embedded developers have begun to look for ways to incorporate it into their devices. ...
Definition of Operating System
... b. Program execution: System must be able to load a program into memory and run that program. The program must be able to end its execution either normally or abnormally. c. I/O operations: A running program may require I/O which may involve a file or an I/O device. For efficiency and protection, us ...
... b. Program execution: System must be able to load a program into memory and run that program. The program must be able to end its execution either normally or abnormally. c. I/O operations: A running program may require I/O which may involve a file or an I/O device. For efficiency and protection, us ...
Firewalls - Andrew.cmu.edu - Carnegie Mellon University
... • allow news reading but not news posting • allow login from inside to outside but not vice versa • allow file transfer to a single system in your domain ...
... • allow news reading but not news posting • allow login from inside to outside but not vice versa • allow file transfer to a single system in your domain ...
What is an Operating System?
... of processes or users to resources defined by the OS Security – defense of the system against internal and external attacks ...
... of processes or users to resources defined by the OS Security – defense of the system against internal and external attacks ...
QNX Hypervisor
... of common elements across the entire system. For example, multiple operating systems can use a single display controller to render graphics content onto multiple displays, such as a digital instrument cluster and an infotainment touchscreen. The QNX Hypervisor can also simplify the sharing of other ...
... of common elements across the entire system. For example, multiple operating systems can use a single display controller to render graphics content onto multiple displays, such as a digital instrument cluster and an infotainment touchscreen. The QNX Hypervisor can also simplify the sharing of other ...
Najwa Knefati CH3 summary
... Because the call to exec () overlays the process's address space with a new program, the call to exec () does not return control unless an error occurs. The C program we now have two different processes running copies of the same program. The only difference is that the value of pid for the child ...
... Because the call to exec () overlays the process's address space with a new program, the call to exec () does not return control unless an error occurs. The C program we now have two different processes running copies of the same program. The only difference is that the value of pid for the child ...
Interprocess communication
... Also introduced in System V Release 3 Allows two or more processes to share some memory segments With some control over read/write permissions Often used to implement threads packages for UNIX ...
... Also introduced in System V Release 3 Allows two or more processes to share some memory segments With some control over read/write permissions Often used to implement threads packages for UNIX ...
Kernel designs explained
... actual ‘microkernel’) takes care of the communication between the servers running in userspace; this is called ‘inter-process communication (IPC)’3. These servers provide functionality such as sound, display, disk access, networking, and so on. This scheme adds a lot of complexity to the overall sys ...
... actual ‘microkernel’) takes care of the communication between the servers running in userspace; this is called ‘inter-process communication (IPC)’3. These servers provide functionality such as sound, display, disk access, networking, and so on. This scheme adds a lot of complexity to the overall sys ...