1. E-mail (E-mail) is a simple and cheap solution to the problems of maintaining constant contact between people. E-mail allows you to create a text message on your computer and send it via the network to another user. You can also send any information by e-mail: video and audio files, photos, spreadsheets in a certain format, graphic files, programs, etc. The disadvantage of both traditional (paper) mail and E-mail is that the sender never knows when his Respondent will read the message.
The email can be digitally signed and encrypted. The speed of shipment is on average a few minutes. The cost of e-mail is minimal and does not depend on the distance. The main advantages of e-mail are simplicity, cheapness and versatility.
2. Teleconferences are the second most common Internet service that provides deferred services.
Teleconferencing is an Internet service through which a subscriber can leave an open message on the network. It will revise interested in the topic users and will be able to answer it as openly. Teleconferences are collective e-mail, thematic electronic discussions designed to exchange information through electronic messages. Teleconferences are the most cost-effective and common means of Internet communication for professionals in a particular industry and just interested people.
The newsgroup service consists of many thematic newsgroups – newsgroups) that are supported by news servers. A news server is a computer that can contain thousands of newsgroups on a wide variety of topics. Each news server that receives a new message sends it to all nodes with which it exchanges news. A newsgroup is a collection of posts on a specific topic. News is divided into hierarchically organized thematic groups, and the name of each group consists of sub-level names. There are both global hierarchies and hierarchies that are local to which organization, country, or network. The set of groups received by the news server is determined by its administrator and their presence on other servers with which the news server communicates. Access to newsgroups is carried out through the subscription procedure, which consists in specifying the coordinates of the news server and selecting the newsgroups of interest to the user. It should be noted that each news server has a specific set of conferences, and if the topic of interest is not found on it, you can try to use a different server. This procedure, as well as working with newsgroups, is carried out using software that supports these functions, for example, a widespread application of Microsoft – Outlook Express.
A lot of people can participate in the discussion of the conference call, regardless of where they are physically. Of course, although this is not the rule, the order of the conference is monitored by special people, the so-called moderators. Their responsibility is to maintain order in the conference in accordance with its rules of conduct and themes. Along with the described form of teleconference services, WWW teleconferences, also called forums, are widely used. The difference is that they work through the web-interface and are placed not centrally on news servers, but on web-sites.
3. A list of rossiki (mail lists) – service does not have its own Protocol and client program and working solely through email.
The list of rossiki is to bring together under one email address of many people subscriber list rossiki. When a letter is sent to this address, the message is received by all subscribers of this list. Leading the list. placers, as a rule, there are people who have a good command of its subject. They are responsible for the preparation and distribution of the next issues. The recipients of the letters are the people who personally subscribed to the list. In addition, they have the right and the ability to cancel their subscription at any time.
Are open of rossiki (for everyone), closed (for people of a certain circle), free (existing due to the enthusiasm of the founders, sponsorship, paid advertisers) and paid. Depending on the number of subscribers, the list of spills is maintained on the server by programs of varying complexity. These programs may or may not provide full functionality, which consists in automatic subscription of clients and acceptance of their unsubscription, checking the correctness of e-mail addresses, maintaining an archive of messages, processing of mail errors, support for work in digest mode (when the subscriber receives not every message in a separate letter, but all messages for some period in one letter), checking messages by the list administrator before rozsipko, etc.
4. Chats. The word chat (from English chat) refers to Internet services that allow for text discussions in real time. What distinguishes them from the traditional form of conversation is that they are conducted in text form – by typing on the keyboard. The most popular open standard underlying chats is IRC (Internet Relay Chat).
IRC is a multi-channel network designed for many subscribers, with which users can talk in real time regardless of their location.
At the time, the chats, which were based on the irc standard, were quite widespread. Today, however, chats conducted on separate web sites and based on either HTML or Java are becoming more and more popular. This allows Internet users to participate in them without installing additional software, using only a standard browser, thus the number of potential participants becomes maximum. On the other hand, the ability to install the system on the corporate website of the company, which ensures the operation of the chat, allows you to widely use this service for commercial purposes, for example, to discuss with consumers certain issues of the enterprise, discussion of products, service systems, etc.
5. Internet pagers. The intermediate position between e-mail and chats on the dynamics and interactivity of communication is occupied by Internet pagers or instant messaging services. Instant messaging services allow you to communicate in real time, combining the benefits of email and phone. It is a free program for direct communication on the network. Made a list of contacts (all your business partners, friends and acquaintances) when you click the icon On-line in the appropriate program, you can find out which of them at this time is in touch with you (that is, on the Internet). Modern Internet – pagers perform functions: file transfer, e-mail, voice messages, news and the like. An example of such programs are ICQ, MSN, AOL Instant Messenger and so on. However, these programs have a significant drawback: the user’s Internet pager companies, such as YAHOO or MICROSOFT, can only communicate with the user of the same service. Currently, the development of common standards for Internet-pagers is underway. At this stage, the best Internet-pager is ICQ program.
6. Skype – free software that provides text, voice and video communication over the Internet between computers (IP-telephony), uses peer-to-peer technology, as well as paid services for calls to mobile and landline phones. The program also allows you to make conference calls (up to 25 voice callers, include or initiator), video calls (including video conferencing up to 10 subscribers), and provides text messaging (chat) and file transfer. It is possible instead of the image from the webcam to transfer the image from the monitor screen, as well as create and send video messages to users of desktop versions of the program.
7. FTP. FTP (file transfer protocol ) is a file transfer Protocol, but if FTP is considered an Internet service, it is not just a Protocol, but a file access service in file archives. One of the reasons for its high popularity is due to the huge amount of information accumulated in FTP – archives for decades of operation of computer systems. Another reason is the ease of access, navigation and file transfer via FTP.