the internetwork operating system

... connected network l FastEthernet 0/0: The exit interface and/or the IP address of the next-hop router Ÿ In this example, both FastEthernet 0/0 is the exit interfaces used to reach these networks 73 ... Determine the Best Path l The router’s primary responsibility: Ÿ Determining the best path Ÿ Forwarding packets toward their destination Routers Determine the Best Path IP Packet enters router’s Ethernet ... ROM, Operating System l The first router: used for the Advanced Research Projects Agency Network (ARPANET): Ÿ IMP (Interface Message Processor) Ÿ Honeywell 516 minicomputer that brought the ARPANET

Ngày tải lên: 09/03/2014, 13:20

... in the affected BTextView object continues to follow the new alignment The. .. view The width of the MyDrawView fMyView is the same as the window, so the default state for the ... snippet produces the text shown in the window in Figure 8-4: BFont theFont(be_plain_font); theFont.SetSize(24.0); theFont.SetRotation(45.0); theView->SetFont(&theFont); theView->MovePenTo(70.0, ... slant to the right. The following code generates the three strings shown in Figure 8-3: BFont theFont(be_plain_font); theFont.SetSize(24.0); theFont.SetShear(45.0); theView->SetFont(&theFont); theView->MovePenTo(110.0,

Ngày tải lên: 26/01/2014, 07:20

... of these guides are available on the product disc To access them, use a Web browser to open the welcome.htm file, either in the top-level directory of the CD-ROM or in the db directory on the ... Groups and User The following local UNIX groups and user must exist on the system: ■ The oinstall group (the Oracle Inventory group) ■ The dba group (the OSDBA group) ■ The oracle user (the Oracle ... Open the /etc/system file in any text editor: # vi /etc/system c. To specify new values for the parameters, add lines similar to the following to the /etc/system file, or edit the lines if the

Ngày tải lên: 07/04/2014, 15:52

... since these nodes provide drivers to the robot's hardware This includes the drivers for the robot base and any cameras, laser scanners or other sensors you want to use On the other hand, the desktop ... Ubuntu alongside them You'll then have a choice of operating systems to use at boot time On the other hand, if you have a spare laptop lying around that you can dedicate to your robot, then you can ... Indigo as their first LTS release to match the Ubuntu LTS release schedule You can find the details on the Distributions page of the ROS Wiki and the Ubuntu Release Schedule In particular, the use

Ngày tải lên: 29/04/2020, 15:00

... about what operating system is? An operating system (OS) is a collection of programs that act as an interface between a computer user and the computer's hardware The purpose of an operating system ... Windows operating system tools using the web: firewalls, automatic updates, and scanning for viruses, spyware, and other malware Find the advantages and disadvantages of using the built-in operating ... manager in the company I was asked by the executive to explore the various tools included with the operating system and assess any additional needs My mission was to learn more about the latest

Ngày tải lên: 24/10/2024, 17:15

... minimize its size. The application defines the isolation policy, but the operating system en- forces it. The OS should prevent processes from violating this policy whether or not they are compromised. ... application-defined users are isolated from one another by the operating system, according to application policy. This is difficult to achieve on any other operating system. We evaluated Asbestos by implementing ... to another principal—an instance of the principle of least privilege [Saltzer and Schroeder 1975]. Such a policy, enforced by the operating system at the behest of a small, trusted part of the

Ngày tải lên: 01/07/2014, 17:30

... in the preparation of this book to ensure the accuracy of the information presented However, the information contained in this book is sold without warranty, either express or implied Neither the ... cd9660 ro,noauto 0 0 Then you have to reboot the system for the changes to take effect You can verify the proper operation using the following swapinfo(8) command: The softupdates feature ... allocations should be allowed File System Backup There are different utilities in the FreeBSD base system to help system's administrators to take backups from their systems But before starting to

Ngày tải lên: 07/04/2017, 16:34

... Updating the Operating System An operating system may contain many security vulnerabilities and software bugs when it isfirst released Vendors, such as Red Hat, provide updates to the operating system ... implemented on other systems.To do this,administrators need to install Bastille on that machine, copy the config file and the BackEndfile to the new system’s ~/Bastille directory, and then run the command: ... if the root user walks away from the system whilestill logged in (a very bad idea), another user cannot access the system simply because he orshe has physical access to the keyboard After the

Ngày tải lên: 19/03/2014, 13:35

... Berkeley’s BSD operating system, MIT’s X Window System, and the Free Software Foundation's GNU project „ The min system libraries were started by the GNU project, with improvements provided by the Linux ... bodies of code; the most important distinction between the kernel and all other components „ The kernel is responsible for maintaining the important abstractions of the operating system z Kernel ... of the user-mode system software „ The environment-variable mechanism provides a customization of the operating system that can be set on a per-process basis, rather than being configured for the

Ngày tải lên: 28/06/2014, 02:20

... program fragment for copying a file using the UNIX system calls This fragment is in C because Java hides the low-level system calls and we are trying to expose them. CuuDuongThanCong.com https://fb.com/tailieudientucntt ... main class p = new producer( ); // create the producer c = new consumer( ); // create the consumer p.start( ); // start the producer c.start( ); // start the consumer } // This is a utility function ... main class p = new producer( ); // create the producer c = new consumer( ); // create the consumer p.start( ); // start the producer c.start( ); // start the consumer } // This is a utility function

Ngày tải lên: 28/01/2020, 23:01

... A.1Operating System Concepts Module A: The FreeBSD System ■ First developed in 1969 by Ken Thompson and Dennis Ritchie of the Research Group at Bell Laboratories; incorporatedfeatures of other operating ... ■ The set of systems programs commonly available definesthe user interface ■ The programmer and user interface define the contextthat the kernel must support ■ Roughly three categories of system ... performed in system mode. ■ The system and user phases of a process never executesimultaneously ■ a kernel stack (rather than the user stack) is used for a process executing in system mode ■ The kernel

Ngày tải lên: 30/01/2020, 01:17

... you to identify the various potential bottlenecks in the ported nginx In this test scenario, the entire contents of the file in the cache of the operating system, and a disk subsystem is no longer ... hard real-time system Their experience with the design, implementation, integration and use of a hard-real-time scheduler in their operating system Plan 9 as an embedded operating system can be ... software distributed operating system [3] We present the general characteristics of Plan 9-based approach to the design of distributed systems, and introduce the Cloud/IX operating system for data

Ngày tải lên: 01/11/2022, 08:49

... bylayering: the binary interface of one operating systemcan be emulated on another operating system by inter-cepting system calls made by an application written forthe emulated system and implementing them ... control to the scheduler When a thread in the domain invokes P, the thread is ferred to the scheduler; if the P succeeds, the scheduler returns If the P fails, the scheduler marks the thread ... handler uses the portal number as an index into the portal table and jumps to the code associ-ated with the portal The portal code transfers the thread from the invoking protection domain to the invoked

Ngày tải lên: 01/07/2014, 18:02

... 4. Locate the reference to the portal in the Look In list 5. Right-click the icon and select Move Up from the pop-up menu until the icon is at thetop of the list Figure 8-1.Viewing the area taxonomy ... the document to a user Each user can add theirsection to the document and track the progress through the task list The Documents Tab The Documents tab in the workspace is used to see all of the ... resolve the conflicts by hand The final option is to simply override one copy of the document with the other Once the document conflicts have been resolved, you can save the document back to the

Ngày tải lên: 05/10/2013, 14:20

... with system messages—messages generated and dispatched by the system. The Message Protocols appendix of the Be Book defines all the system messages. In short, system messages fall into the following categories: Application ... posted message becomes the next in the queue, the looper invokes DispatchMessage() to pass the message to the target handler. The effect is for the posted message to reach the target handler’s ... sev- eral examples of the creating of messages and the dispatching of these messages both by the object that created them and by other objects. Figure 9-1. The inheritance hierarchy for the Application...

Ngày tải lên: 17/10/2013, 19:15

... For the Save file panel, the display of the panel comes when the user chooses the Save As item from the File menu. In response to the message issued by the system to the appropriate MessageReceived() ... control is in the hands of the user. Once the user confirms a choice (whether it’s a file selection in the Open file panel, a click on the Save button in the Save file panel, or a click on the Can- cel ... in either type of panel), a message is automatically sent by the system to the panel’s target. By default the panel’s target is the application object, but this can be changed (either in the BFilePanel...

Ngày tải lên: 20/10/2013, 10:15

... during the execution of a program. An object can be added or deleted from the heap without regard for its placement in the heap, or for the other contents of the heap. The stack, on the other hand, ... such tasks. The zoom- ing and moving of windows is handled by the system, not by the SimpleApp code. This simple demonstration emphasizes the power of the BeOS system software—it is the system software ... window’s tab) • The type of the window (the look and feel of the window) • The behavior of the window (whether it has a resize knob, and so forth) Recall from your C++ background that when the definition...

Ngày tải lên: 26/01/2014, 07:20

... file with the same name as the project (and thus the same name as the application that will be built from the project). The header file holds the definition of the class derived from the BApplication ... any resizing of the window. The final BView constructor parameter determines the types of notifications the view is to receive from the system. The Be constant B_WILL_DRAW means that the view should ... stated that the header file that bears the name of the project should hold the declaration of the project’s application class the class derived from the BApplication class. Here you see that the HelloWorld.h...

Ngày tải lên: 26/01/2014, 07:20

... to another window. Class Descriptions and the Be Book The definitive source of information for the many classes that make up the BeOS software kits is the Be class reference by the programmers of the ... to them, some of their classes appear throughout the book. See the description of the Support Kit below for a specific example concerning the BLocker class. Application Kit The classes of the ... created in the application constructor, the MyHelloWindow constructor is responsible for creating a new view, adding the view to the new window, and then displaying the new window. The new MyHelloWorld...

Ngày tải lên: 26/01/2014, 07:20

... was clicked. The values of the point are in the view’s coor- dinate system. For example, if the cursor was over the very top left corner of the view at the time of the mouse click, the point’s ... If the point (100.1, 49.9) is used instead, the result is the same the win- dow’s corner ends up 100 pixels from the left and 50 pixels from the top of the screen. The above scenario begs the ... the window (to the top view), rather than to another view, so both views are on the same level in the window’s view hierar- chy. The Draw() function of each view type includes code to frame the...

Ngày tải lên: 26/01/2014, 07:20