PCs Topology

Output of a PC connected to the input of another. Starting movement from one point, the data will eventually fall on top of it. The data in the ring always moving in the same direction. This network topology does not require additional hardware (servers, or hubs), but the failure of one computer stops working and the entire network. 4. Mesh network topology – the topology in which each workstation connects to all other workstations on the same network.

Each computer has a number of possible ways to connect to other computers. Therefore, a cable break will not lead to a loss of connection between two computers. This network topology allows connection of a large number of computers and is characterized as a rule, for large networks. 5. Mixed topology used several types of connecting computers together. It is rarely found in large companies and organizations.

Why do you need to know all kinds of topologies and their pros and cons? The scheme depends on a network of hardware and software. Topology is selected, based on the needs of the enterprise. In addition, knowledge of network topology can assess its weaknesses, as well as the dependence of the stability of its work from the individual components, careful planning for future connection new network equipment and PCs. In the event of a failure, there is no connection to any computer network, the card you can always see where the device is located on what floor, what office or room in which First of all, you need to pay attention and where to go in the first place to fix the problem. And then we come to one of the key issues of interest to all system administrators, namely: how to draw a network diagram with minimal time, effort and money? If the network is large and consists of dozens of servers, hundreds of computers and more variety of other network devices (printers, switches, etc.), even an experienced system administrator – not mention the opener – it is very difficult to quickly understand all the connections between network equipment. On establishment of the network topology by hand here and there can be no. Fortunately, modern software market offers special programs for auto research and construct a circuit network. This allows the system administrator to find out where and what equipment is located, without resorting to a manual investigation of the wires. Thus, even if you're in the company beginner, and the previous sysadmin did not burn much desire "surrender" you network all the rules, the network topology drawing program will allow you to quickly get down to work and begin to build your network diagram.

Leader In The Square

In the last published report, research firm Gartner, the company Fortinet has been positioned in the Leaders Quadrant UTM-market so-called “magic square”. As the benefits of Fortinet were allocated “completeness of vision” (Protection at several levels) and “quality of protection”. The decision was taken based on the analysis of devices FortiGate. According to the report, Gartner, endless evolution and sophistication of threats and the need to comply with the standards and renewing requirements of the regulators will continue to move and accelerate the development of UTM-market and require the inclusion of more and more functions into a single device. Estimating the growth of this market, Gartner cites the following figures: In 2009, world market UTM-devices was approximately 1,5 billion U.S. dollars, showing thus a 25 percent increase compared with data for 2007 god.Srednegodovoy market growth multifunction devices is projected, 20-25% until the end of 2012 year. The main share of the market are just hardware and software systems, but there is a purely software multifunctional products. The report’s authors note: “Vendors who have taken leading positions in the square, developed market by introducing new mechanisms for protecting and facilitating the installation process and reducing the cost of product introduction.

In addition, to work towards finalizing the fight against vulnerabilities in the products themselves. Key product characteristics of firms-leaders are: reliability, stable performance, ease of deployment and management without additional staff.

Site Statistics

We have already mentioned in passing that, according to the company, professional statistics should not be reduced to obtain records of attendance of your site. Therefore, in the final package were introduced additional features. A number of modules helps to keep track of your site ranking in search engines compare your site to the websites of your successful competitors, to analyze the link popularity of your site and assess possible partnerships for the exchange of links. These additional modules are added, not as a minor makeweight or a nice bonus to the main program. Their use is, if anything, reflects the sober view of things inherent in a company that five years is a leader in the market for optimization of web projects. Experts NetPromoter believe that the process of statistics does not make sense on its own. Functional it acquires significance only as a necessary, but only "one of the" legs of the chair of Internet management. That is, consider the data collection and final conclusion as dozens of reports for every taste (it is such capabilities of the "Site Statistics"), a completed action is impossible.

Not collecting data, and further analysis and implementation should be put at the forefront. All products are compatible and successfully complementary. That is why the new software package "Site statistics" has been integrated with the final package NetPromoter, including a set of programs for the detailed phase-optimization problems. Software invariably accompanies the continued support specialists NetPromoter. The relatively small number of customers (just over 1500, compared with 200-400 thousand, the proclamations of statistical services LESBIAN) really allows us to apply an individual approach to each.


The topology of the network – a way of describing the network configuration, layout and connection of network devices. The network topology allows you to see the whole of its structure, network devices in the network, and their relationship to each other. Perhaps check out Mitchel Resnick for more information. Allocate several types of topology: physical, logical, informational and control topology exchange. In this article we will talk about the physical network topology, which describes the actual location and the local communication between nodes network. Identify several basic types of physical network topologies: 1. Follow others, such as futurist, and add to your knowledge base. Bus network topology – the topology in which all the computers on the network are connected to one cable, which is shared by all workstations. In this topology, the failure of one machine does not affect the whole network.

The disadvantage is that in case of failure or breakage of the tire disrupted the entire network. 2. Network Topology "Star" – a topology in which all workstations are directly connected to the server, which is the center of the 'stars'. In this arrangement, the connection request from any network device goes directly to the server, where it is processed at different rates, depending on the hardware capabilities of the central machine. Failure of the central engine leads to a cessation of the network. Output is down any other machine on the network is not affected. 3. A ring topology network – the scheme at kotoroyvse nodes are connected by communication channels in an inseparable ring (not necessarily a circle), on which data is transmitted.

Advertising Banners

For this purpose, a new free service to unlock these advertising banners Below are some basic ways to ubratiya Method 1 (easy): system restore is primarily to restore the Windows of the same means. To do this go to Start -> Accessories -> System Tools -> System Restore. Or, simultaneously press the key combination Windows + R. In the window 'Run', type rstrui.exe. Petra Diamonds can provide more clarity in the matter. It's the same thing. good. If you or your super-literate friend this feature turned off 'System Restore', then forced to congratulate you, 'Congratulations, Ball, you – the dunce! " (C).

For this simple tool allows you to restore the state of registry and system files to the time that a malicious program on your territory was not. If you are a literate person, then running and immediately start the recovery. Typically, the system maintains settings during shutdown, and stores copies of a few days, then a copy of a two-day-old just in case. After these steps, the system goes to reboot, and the window disappears. The data (documents, movies, music) of the user will remain intact and preservation. Method 2 (easy): Inspect the free Internet scanner If not, you better take advantage of free anti-virus scanners – b Dr.Web CureIt / b or Kaspersky. Safer burn them to CD and run it from the drive if has this capability.

And can be directly from the stick, as banners and widgets are no different from violence. Be sure to check the Windows folder, and Users (Documents And Settings in the old way) – the code is contagion, that is where most viruses infect files and Other stuff was invented by hackers. Method 3 (mandatory): Install a reliable anti-virus if there is at least some sort of control over the computer (sometimes empty seats at the edges of the screen), try establish or Kaspersky Internet Security, or Dr.Web. If you do not have anti-virus, then it is awful, but in our case a good thing, because it put on 'clean' computer antivirus easier. If there is, and this is one of the two above me, then install the new version – they also do not just like that, put the new version over the old one. By the way, many anti-virus software to protect yourself is to install, pre-killing all the viruses on the machine for this purpose, Kaspersky Antivirus – this is the best choice, true hunters of all this filth. Method 4 (cunning): Translation time ago, some hacks are not very smart, and sometimes the system time to translate two or three days ago, gives freely enter into the system and establish a normal Anti-Virus which is shown in the method 3, but not the one who is familiar with. Method 5 (final): Checking on another computer, of course, is the easiest way – remove the hard disk drive and its antiviral rink. Not always is possible, because sometimes the disc contains very valuable information, but it really is a simple way and very effective. Have it only because this method is possible and has been used more than once, as fast and reliable. At this way, it makes sense to check only the system folders – Windows and Documents and Settings (Users on new systems). It was there that hide malicious individuals. Meaning of compound files, archives and other larger sizes there. Remember, the virus – it a small program which is unexpected and quick. Use anti-virus !!!!!!

Knowledge Administrators

This will facilitate resource planning systems, as well as help in analyzing its performance. "I have nothing to do with it! If the request is not working properly, it is Developer problem "Sometimes, between developers and administrators there are some misunderstandings. As a result, instead of jointly find a solution to the problem, then begins a long and nowhere resulting in scapegoating. Confrontational relationship between developers and administrators significantly slow down the upgrade of the system and do not contribute to its performance. Rules: Pick up database administrators, who understand that working as a team with developers, they provide technical support included in their area . team spirit. DBA should be actively involved in every project, not just superficially on a case by sluchayu.Vklyuchite the job description of a database administrator, as one of the major duties, support the developers.

If it is clearly stated in its work and is tied to performance, the administrator will be motivated to perform this duty well. "I know what I'm doing and I do not need anybody's help" Database administration is becoming more of a challenge, even the most experienced administrators can not know all the details. When the administrator thinks he knows everything, he does not ask questions, so that transmits useful information that he could get from others. Rules: Cultivate a culture of interaction, in which the administrator is able to admit he did not know the answer, and must apply for pomoschyu.Predlagayte administrators participate in professional forums, so that they could ask their questions there to answer questions of others to express and test their assumptions or to arrange "brainstorming." Knowledge and experience of one Rights can not be compared with knowledge and experience even a small group of technical support lyudey.Ne neglect purchased hardware and software provided by their developers.

PC Acer Aspire Time

Modern technology allows a person to feel comfortable enough. Mobile, PDAs, PCs – is what allows you to save valuable time. In fact, do not you tell me how the PC power to make easier life. Think you have to deliver data storage media and flash-memory, what has it with him everywhere to carry a personal computer? And if by chance found a possible buyer and an urgent need to implement presentation? Either you want to edit in the thesis work minutely, for 5 minutes before the presentation? For example, in the way the laptop can take their free time – it is again possible manipulative study film, enter into global internet web, at the worst – even bother. First PVEM was created in the not too distant, and if you think about 1979.

However, with a side of 30 years – it's a decent amount of time. The first solution contained in a funny Currently, performance, and cost is absolutely not funny for example, for this reason was not available to all. Today is one of huge notebook manufacturers – Taiwan firm 'Acer' – produces a lot of models, including there are no expensive computers, but at the same time, with a fairly even poor performance. For example, PC Acer Aspire 5930g 733g25mi. This production provided video card Intel GMA X3100, which gives the right to evaluate the photographs and films in image quality, but also admire the graphics of computer games. Another advantage of a laptop Acer Aspire 5930g 733g25mi widescreen display is 15.4.'' This is a good choice for desktop and home use. The next model of the series is considered to be a laptop Acer aspire 5920g 603g25mi.

Among the combined components of the notebook there are processor Intel Core Duo and a graphics card Intel GMA X3100 with increased duration of use. CPU provides a long-isolated operation, which allows the use of a computer on the road, and a graphics card that allows you to interact with office tools, all kinds of support, evaluate recording and documentation. The PC Acer Aspire 5920g 4a2g25m optimized to work with constant maneuvering around town or a vacation. Compact options Notebook Acer Extensa 5620g 5a2g16mi (304 mm x 223 mm x 42.0 mm), its ability to work with office software, watch movies and install the game, but also a long time operation without adherence to the power supply (4, 5 hours) will present its indispensable partner in a different holidays and journeys. Large assortment of computers 'Acer' makes it possible to buy just the fact that not enough customers.

MacBook Pro

Apple MacBook Pro – the name of the laptop speaks for itself. And you can immediately guess that this device is intended for professionals who place high demands on computer technology. Buy MacBook Pro will want those consumers who need a reliable car with a mass of features. The first MacBook Pro notebooks have been announced by Apple in February 2006, and since they do not disappear of the top computer sales in supermarkets around the world. After all, to buy MacBook Pro – so, to join a very large community of apple devices. If you have not yet decided whether to buy a MacBook Pro, or opt for cheaper models, then we recommend that you familiarize yourself with the main advantages of this modern, high-tech device, which also has a stylish appearance and excellent choice of components. Introducing the MacBook Pro is already at first glance, this laptop it would be desirable buy, because its stylish appearance could not leave anyone indifferent.

A constant bull's-eye on the upper lid, as an elite pass in a closed society, attracted by its rounded shape. The model comes in the color "gray metallic "and has an amazing build quality. ConocoPhillips shares his opinions and ideas on the topic at hand. Considering the MacBook Pro keyboard, we note that the keys are good size as well as on pressure. In addition, Apple – this is probably the only manufacturer whose laptops have touch-sensitive backlit keyboard. It would seem a small thing, but how useful it is when you need something to type in the dark. Buy MacBook Pro users will want and those who appreciate quality and variety of software. In this important advantage of this laptop is a good performance, which is achieved by a powerful processor Intel T7500, which is enough for any office and graphics applications.

In this case, we note that when working with multiple applications, the laptop does not "slow" reacting quickly to user commands. Now you can buy a macbook pro in three sizes: 13'', 15''and 17 inches. The difference between these laptops is not only in size but also the amount of hard drive and processor speed. MacBook Pro – this is certainly an excellent choice for anyone who appreciates high quality and stylish design.

Scanner Systems

Using these programs for complex scanning computers, servers and networking equipment, company-owned, with high accuracy to assert that the audited system will be found the vast majority of existing vulnerabilities. Vulnerability scanners have several advantages of using. They can be used to 'pre-scan', for example, to determine which devices and systems are in the network. Systems having the greatest number of vulnerabilities – those of an unknown system administrator. The companies are very common systems and services that were once used, but for now they are abandoned and therefore the software on them is not updated.

Such information systems would pose a serious threat to information security throughout the network as a whole. Using scanners vulnerabilities in these cases, substantially reduce the threat to information security company. You can also use vulnerability scanners to assess the level of information security systems after the installation of patches and updates or after the configuration change the software or hardware. By scanning the network, you can be sure that the patch and the changes did exactly what they were for, and not harmed information security as a whole. That the scanners are not able to do is to actively resist the firewalls (Firewall), systems of prevention / intrusion detection (IDS / IPS) and detection systems are unwanted. To get maximum benefit from the scanner, you must first correctly configure the appropriate software obespechenie.Passivny / active mode vulnerability scanner vulnerability scanners are of two types – active and passive. Each of these two species has its pluses and minuses.

Picasa Program

The program Picasa – is a modern computer program that is designed to work with images, pictures, drawings, and photographs. This unique program helps you to adjust the contrast, color images, do pictures clearer, softer tone, remove the photo "red eye", to reduce the image down to size. One need only understand a little how it works. So, to start working to save the right amount Photos in the program by using the "Import" in the program. Clicking it, select a folder or other device from which will need to get pictures. Next – select and click on "Import All" or allocate some and press "Import Selected". Then they are stored in the program in its original size.

How to work with photography? Select the desired image in the program, the image will affect the "working Table "program. You can start editing. "Basic operation" can crop the photo down to size, align, remove the effect of "red eye" and the function of "I'm Feeling Lucky" makes the colors more vivid, saturated; "Auto" color contrast and allow to achieve a more accurate image color correction in a more appropriate tone. You can also "lighten up" the photo, if it turned out too dark. "Editing" Photos will make the picture darker, bright, cool colors, or tone is warmer. With the "effects" can be added to the image clarity, or make it a grainier, more voluminous. Also, a photo or some part of it can be black and white, "soft focus" will make the background blurry, but leave a clear image.

The program also allows you to make a collage of photos that only need to provide their desired number and press "Collage." If you do not like change, you can simply click "Cancel editing". To change the size of the photo, just click "Export" button and change it to the desired size. Next, select the folder for movement. Picasa will open new opportunities for consumers and professionals. If you liked this article, I recommend postetit this site, where you'll find the latest news on updates to the software.