Local networks are no longer something unusual, as they were at the dawn of their creation. The advantages of such networks are obvious. Users of computers united into a single local network, will have access to shared files and folders and can easily exchange necessary information, edit documents, play games using team modes etc. However, this only applies to computers that are connected to each other using wires and a fairly large amount of hardware. But what to do when the computers are quite far from each other? This is where software products for creating virtual local networks come to the rescue. Among them, quite often there are completely free programs. Downloading free programs for creating local networks and installing them on your computer is not a problem now. As they say, there would be a desire. Among the free burnouts for local networks of such applications, two main types can be distinguished. The first type allows you to create a virtual private network in such a way that one of the computers will act as a server. And this also includes programs that use computers alternately as the main server. Data exchange in this case is carried out using P2P (peer-to-peer) technologies, that is, using the universal BitTorrent protocol. The second type includes programs where the role of the central server is played by remote server software manufacturer. Here you only need to register on the manufacturer’s website. If we talk about free programs of this kind, then, in comparison with paid analogues, they allow you to create networks with the connection of about one and a half dozen computers or accounts. It is clear that paid analogues can create networks connecting even several hundred computers. However, for home use or for small offices 15-20 users are absolutely enough. It must be said that networks created using such applications have all the capabilities of conventional wired networks. And the setup, in most cases, is very similar. The difference in such programs may also be that sometimes one computer is bound to only one specific IP address. In some other cases, the IP address may be assigned automatically. To work on such a network, you will only need a program installed on your computer. Some free programs for creating private virtual networks even allow you to use the registration data of many Internet messengers, for example, Jabber accounts. However, the capabilities of such programs are quite similar. Some additional functions may differ, for example, in the presence of built-in chats or the ability to exchange short text messages. It seems that today, virtual networks are still preferable, since they allow computers located even in different parts of the globe to be united into a single network. On our website you can download the most modern programs for creating local networks.

There are many reasons why you need to connect 2 computers over a local network. For transferring files, for games, creating an access point and much more. In this article we will look at how to connect two computers without programs. And let's look at programs for creating a local network via the Internet.

For all these operations we need two or more computers, the Internet, and if you want to connect without programs, then you need a network card that supports Wi-Fi technology.

How to connect two computers without programs?

To do this we need:

• Go to the Network and Sharing Center and click "Set up a new connection or network."

• Select "Settings" wireless network computer - computer" and click next.

• Select a name, network type (preferably WPA2, since it will eliminate the high probability of your connection being hacked), write a password and click on the checkbox: “Save changes for this network.”

• After setting, click next and close the window.

Go to the second computer, where you just need to connect to our network.

This method is suitable if 2 computers are nearby, but if they are far away, then, unfortunately, the signal will not be received.

But what if you need to communicate with a friend over a long distance?

To do this, you need to download one of the programs presented below.

Programs for creating a virtual local network

If you don't have a game license, or you just don't want to go through the hassle of constantly copying and pasting an IP address, you can simply download and install a LAN simulator - a program for connecting multiple computers. With the help of such programs you can easily play pirated or even licensed games online, and sometimes find friends there.

There are actually enough such programs and everyone can find the right one. It also happens that one of the programs may not work or not support the desired game, as often happens with Hamachi or other programs, so you can look for a solution to the problem on the Internet or use another program.

Hamachi

This program for creating a local network is presented Windows users and was the most popular of this list until recently, when significant competitors appeared. This is where trouble can happen. "Tunnel through a repeater" - very common problem, which many users of this program encounter. The best solution would be to simply change it or configure it correctly, which is not always easy and is not guaranteed to work.

Tunngle

Enough popular program to create a local network via Wi-Fi and the Internet. With its help, you can connect to each other in the same way as with Hamachi. The principle of operation of this program is slightly different from others, because here you do not need to create a room for a separate server. These rooms are already created for each game, each room can accommodate 255 people. Quite convenient. This program contains almost all the games that you can play with friends.

GameRanger

Probably the most popular program for creating and playing with friends. It supports all popular games, but there are also those that are not within its reach. There are a lot of people sitting in this program for days on end, and you definitely won’t be bored if your friends have gone to bed. The server has a ping, you can see how good or bad the user's connection is. When you first register, the program will automatically scan your computer for games. Next, all rooms created in the main screen will be shown. this moment, as well as the nickname of the person who created the room. Some rooms may be password protected. This means that the user wants to play only with his friends and no one else.

Evolve

The program is a good analogue of Tunngle, but it is less popular among the audience. But in this program there are no advertisements and pop-ups that irritate gamers so much. Here you don’t have to mess with the settings, because everything is done automatically. But with all its advantages, there are also disadvantages. Evolve lacks the room search feature found in Tunngle. Instead there is something like smart search. You just need to go into the game, and the program itself will find all existing rooms to which you can connect.

Conclusion

Of course, there are many programs for creating a local network, but there is also a way to create a local network without using third party programs. If you do not trust the Internet and only Microsoft programs are installed on your computer, then there is also a way for you to create a local network. Everything is completely simple and does not require unnecessary installation of software, however, there are some disadvantages, and it is difficult not to note them, namely: connection can only occur via Wi-Fi networks, accordingly, if you have a PC without the appropriate network card, which does not support this technology, then you will not be able to connect to the local network without programs.

Our programs for system administrators will help you keep abreast of everything that is happening in the computer park and the enterprise network, respond in a timely manner to equipment failures and malfunctions software, minimize costs and downtime. This page provides tools for monitoring the network, servers and hosts, for PC inventory, accounting installed programs and licenses, creating reports on computer hardware, for traffic accounting, for studying LAN topology and creating graphic diagrams.

The system administrator may also find useful utilities for searching files on local networks and auditing user access to file resources on servers. All these tools will help the system administrator improve the performance of network devices and servers and ensure the proper level of security in the enterprise network.

10-Strike software is included in the unified register of Russian computer programs of the Ministry of Communications and can participate in government procurement.

Programs for administrators, network utilities

A program for inventory and accounting of installed software and hardware on an enterprise PC. "Computer Inventory" allows system administrators to keep track of computers and view configurations remote computers and lists of installed software, track configuration changes (hardware and software). The program contains a powerful report generator. For example, you can create reports on the presence of certain software on computers and its quantity. At planning upgrades can be created report containing computers with insufficient disk space or random access memory . Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

- program for administration and visual monitoring of servers and computers on the network, allowing you to observe the current state of devices in graphical form at any given time. LANState monitors devices and signals various events. LANState contains many functions useful for system administrators: sending messages, shutting down remote computers, scanning hosts and ports, obtaining various information from remote computers (registry access, event log, etc.). Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

- program for monitoring servers and other network devices, monitors the performance of hosts/servers and notifies the administrator of problems. Find out in time about a failure that has occurred (connection loss, server disk space running out, service stop, etc.) and fix the problem with minimal loss of time. The software signals problems using sound, on-screen messages, by e-mail, and can launch external programs, scripts and services, as well as reboot computers and services. Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

- a program for searching files and documents on local network computers(via NetBios and FTP protocols). Enter a phrase or file masks and find the information you need. When viewing search results, found files can be immediately opened, saved to disk, or generated a report. The search uses multi-threaded technology, which significantly speeds up the work. You can set filters by file size and modification date. Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

- user access monitoring program shared folder and files, allows you to find out in time about the connections of LAN users to the computer. The program beeps, displays alerts on the screen, and keeps a detailed log of connections, which records information about who connected to the network and when. network folders computer, what files were opened, etc. Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

3.0 FREE!

- scanner for local networks, IP addresses and hosts. This free program allows you to scan a local network and detect active hosts, computers and servers, as well as find open ports TCP. Supports scanning of IP address ranges and many protocols for discovering network devices (ICMP ping, port search, NetBios, SNMP, UPnP, ...). If you have administrator rights with Windows computers can be considered a set useful information. Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

Sets of network programs for system administrators

Software suites for system administrators allow you to save money when purchasing several of our products or all at once. Get three products for the price of two and so on. For example, when purchasing Full set of administrator programs in option " for the organization"(without restrictions on the number of jobs), consisting of seven of our programs for system administrators, you can save up to 85,000 rubles or 30%!

Other utilities

- CD cataloger (CD, DVD). With its help you will quickly find necessary files on CD and DVD discs your collection. SearchMyDiscs helps you organize your CD collections and DVD discs, allowing you to find required disk in a few seconds. If you are tired of searching for the right disk for a long time every time, this tool is for you! Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

- program for analyzing Raw log files of the Apache web server. Creates various reports and histograms on statistics of user access to the website, and counts direct file orders. The analyzer has many settings and filters that will allow you to get accurate information about your site, downloaded files, and who is coming to you and from where. Windows XP/2003/Vista/2008/7/8.1/2012/10/2016 are supported.

Payment and delivery

When ordering software legal entities Payment by bank transfer is accepted. Invoices are issued in in electronic format, a contract is concluded. Electronic delivery: the distribution kit is downloaded from our website, registration keys are sent after payment by e-mail. After payment, the original contract and documents for accounting are sent to the buyer by mail.

Issue an invoice (indicate the required names of programs and types of licenses, your details and the name of the director for the agreement)

All our products and licenses are also presented in the Softkey and AllSoft online stores (follow the “buy” links from our website).

Our clients: small and medium-sized businesses, government and budget institutions, hospitals, schools, colleges and institutes, banks, oil industry, telecoms.

The CADE 2D vector editor for Windows was developed by a company specializing in working with CAD. The program allows you to easily create a detailed network diagram. One of the most useful features, in my opinion, is the ability to sign an IP address, serial number and the name of the manufacturer for each device on the network. CADE includes all the templates necessary for drawing up a diagram and is distributed absolutely free of charge.

Concept Draw Pro is one of the most powerful business tools for drawing diagrams, and not just for network diagrams. It takes a minimum of time to master the program - all operations are carried out by simple drag and drop. Concept Draw Pro comes with a complete set of network symbols, and every aspect of the diagram can be customized. The application costs $249.

Dia is open source diagramming software, the main disadvantage of which is its outdated interface and primitive character set. But the program is very easy to use without being distracted by any extraneous tasks. Dia is free and works on almost all desktop systems. Linux distributions.

Diagram Designer is another one free utility with an outdated interface, but very easy to use, which will surely appeal to many users. Unlike Dia, the program offers a much wider selection of symbols and icons. The only thing I didn't like about Diagram Designer was the need to draw connections between computers manually, because the program uses a free-form shape to do this. Apart from this small drawback, DD is a completely decent solution.

eDraw Max is one of the best tools on this list, with the exception of Visio, of course. The program is easy to learn, has a convenient, and, moreover, the most modern user interface from all the options listed. eDraw Max is a fully functional business diagramming tool for any purpose, not just network diagrams. The cost of the solution is $99.95 per license, and the more licenses, the cheaper each of them.

There are some incredibly bad programs, and GoVisual Diagram Editor is one of them. It is a difficult tool to use and produces less than satisfactory results. Although it can still be used to create a network diagram, it will not be particularly readable because the GoVisual Diagram Editor is missing some useful features- in particular, icons of network devices. But if someone needs a free diagramming program for any purpose, GoVisual is just the right option because it comes for free.

I would include LanFlow among the best. The program has an excellent interface, offers a rich selection of network objects and allows you to easily create local, telecommunications, external network diagrams, as well as computer diagrams. LanFlow even provides two different network diagram templates: 3D and black and white. To create a diagram, just select a template and drag suitable objects onto it, which can be grouped, deleted, and so on. A single-user license for the program costs $89, so LanFlow can rightfully be called one of the best budget alternatives to Visio.

Although NetProbe can be used for mapping, its primary purpose is to monitor network devices in real time. But the main advantage of NetProbe as a diagramming tool is that network devices can be added to the diagram as needed, even in advance. There is no need to do this manually - the built-in NetProbe component automatically scans the network and compiles a list of all devices available on the network. The Standard version is free, but can only track eight hosts. The Pro version costs just $40 for up to 20 hosts, while the Enterprise version, which can monitor up to 400 hosts, is priced at $295.

Network Notepad (literally "network notepad") is exactly what its name suggests - a notepad for drawing up network diagrams. But despite its apparent simplicity, the program has rich capabilities, including interactive functions (Telnet, network browsing, pinging, etc.). Network Notepad has a simple drag-and-drop interface and can automatically discover Cisco devices. The program is distributed free of charge.

Visio is, of course, the de facto standard in the Windows diagramming application market. The program allows you to easily create beautiful diagrams networks and provide them general access via a web browser. Visio includes a rich set of templates, including for data centers, help desks, network racks; for office consolidation, enterprise-wide network planning, data center or home office; for drawing up a fault tree, heating, ventilation, air conditioning plan, etc. Visio - The best decision for drawing up network diagrams, and therefore it is not cheap: $249.99 for the Standard version, 559.99 for Professional and 999.99 for Premium 2010. You can read more about the capabilities of the versions at official page Visio.

Materials

Programs necessary for working on the Internet, including for browsing websites, receiving and sending mail or text messages, as well as for transferring files over the Internet.

Browsers

Browsers - special programs to browse the Internet.

Messengers

Programs for communication and communication over the Internet or local networks.

Mail clients

Programs for sending and receiving email.

Download Managers

Programs for managing file downloads, allowing you to resume them in the event of a connection break.

p2p clients

Programs for receiving files from networks using p2p technology.

FTP clients

Programs for transferring files via FTP.

Browser Add-ons

Various programs that are built into browsers and expand their functionality.

10. Classification and characteristics of computer viruses. Methods of protection against computer viruses.

Computer virus is a specially written, small-sized program (i.e., a certain set of executable code) that can “attribute” itself to other programs (“infect” them), create copies of itself and inject them into files, system areas of the computer, etc. .d., and also perform various unwanted actions on the computer. Much is known in various ways classification of computer viruses. One way to classify computer viruses is to divide them according to the following main characteristics:

 habitat

 features of the algorithm

 methods of infection

 degree of impact (harmless, dangerous, very dangerous)

Depending on the environment, the main types of computer viruses are:

 Software viruses (affect files with the extension .COM and .EXE)

 Boot viruses

 Macroviruses

 Network viruses

Software viruses is a malicious program code that is embedded inside executable files (programs). Viral code can reproduce itself in the body of other programs - this process is called replication. After a certain time, having created a sufficient number of copies, a software virus can proceed to destructive actions - disrupting the operation of programs and the operating system, deleting information stored on the hard drive. This process is called a virus attack. Boot viruses- do not strike program files, and the boot sector of magnetic media (floppy and hard disks). Macro viruses– affects documents that were created in application programs that have tools for executing macro commands. Such documents include documents from the word processor WORD and spreadsheet processor Excel. Infection occurs when a document file is opened in a program window, unless the ability to execute macro commands is disabled in the program. Network viruses sent from computer to computer using computer networks for distribution, email and other channels.

Computer viruses are classified according to their operating algorithms:

 Worms (sent from computer to computer via computer networks, email and other channels)

 Invisible viruses (Stealth viruses)

 Trojan horses

 Programs are mutants

 Logic bombs

Currently the most common types malware include: worms, viruses, Trojan horses.

It is advisable to prevent viruses from appearing on your PC, but if your computer is infected with a virus, it is very important to detect it. The main signs of a virus appearing on a PC:

 slow computer performance

 freezes and crashes in the computer

 changing file sizes

 reducing the size of free RAM

 significant increase in the number of files on the disk

 disappearance of files and directories or corruption of their contents

 changing the date and time of file modification

And other signs.

Methods of protection against computer viruses One of the main ways to combat viruses is timely prevention. To prevent virus infections and Trojan horse attacks, you must follow some recommendations:

 Do not run programs received from the Internet or as an attachment to an e-mail message without checking them for viruses.

 Everything needs to be checked external drives check for viruses before copying or opening the files they contain or booting your computer from such disks

 It is necessary to install an antivirus program and use it regularly to scan computers. Promptly update your antivirus program database with a set of virus signature files as soon as new signatures appear

 Must be scanned regularly hard disks in search of viruses. Scanning usually occurs automatically every time you turn on your PC and when you place an external drive in the reader. When scanning, an antivirus program looks for a virus by comparing the program code with the codes of viruses known to it, stored in the database

 create strong passwords so that viruses cannot easily guess the password and gain administrator permissions. Regular archiving of files will minimize the damage from a virus attack

 The main means of protecting information is backing up valuable data stored on hard drives

There are quite a lot of antivirus protection software available. Modern antivirus programs consist of modules:

 Heuristic module – to identify unknown viruses

 Monitor – a program that is constantly located in the PC’s RAM

 A control device that runs anti-virus programs and updates the virus database and components

 Mail program (checks email)

 Scanner program – checks, detects and removes a fixed set of known viruses in memory, files and system areas of disks

 Firewall – protection against hacker attacks

The most effective and popular anti-virus programs include: Kaspersky Anti-Virus 7.0, AVAST, Norton AntiVirus and many others.

List of sources used:

Solomenchuk V. Internet: Short course. – St. Petersburg: Peter, 2002.

Guk M. IBM PC hardware. / St. Petersburg, St. Petersburg, 1999

Kaspersky E. Computer viruses in MS-DOS. / M., “EDEL” - “Renaissance”, 1992.

Explanatory dictionary of computer technology. / St. Petersburg, LLP “Channel Trading LTD”, 2000.

Workshop on economic informatics: Textbook in 3 parts - M.: Perspective, 2002.

Basics of working on personal computer: Tutorial/ ed. prof. A.V. Yurkova. – St. Petersburg: NIIMM, 2004.

Khoroshilov A.V., Seletkov S.N. World information resources: Textbook. – St. Petersburg: Peter, 2004.

Potapkin A. Fundamentals Visual Basic For Microsoft package Office. M., 1996.

Dubnov P.Yu. Access 2000. Database design. Eco 2000.

Reitinger M., Much G. Visual Basic 6.0. Student library. BHV 2000.

Kopylov V.A. Information law. M., “Yurist”, 1997.

Kolesnichenko O.V., Shishkin I.V. PC hardware. St. Petersburg: BHV-Petersburg, 2004. – 1152 p.

Stang D., Moon S. Secrets of network security. / K., “Dialectics”, “Information Computer Enterprise”, 1996.

Platonov Yu.M., Utkin Yu.G., Ivanov M.I. Computer Science (with CD). Series "Student's Library". – M.: SOLON-Press, 2004.