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บริการต่างๆบนอินเตอร์เน็ต

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บริการต่างๆบนอินเตอร์เน็ต

  1. 1. บริการต่างๆบนอินเทอร์เน็ต เสอน มิส เขมจิรา ปลงไสว โดย นาย กชกร แซ่ห่าน ชั้น ม.5/5 เลขที่ 19
  2. 2. Search Engine Most people don't want 290 search engines, especially people who are internet beginners.Most users want a single search engine that delivers three key features: Relevant results (results you are actually interested in) Uncluttered, easy to read interface Helpful options to broaden or tighten a search With this criteria, 10 Reader Favorite Search Engines come to mind. These 10 search sites should meet 99% of the searching needs of a regular everyday user. Below is a changing list of user favorites, compiled from reader email suggestions. The sites below are in random order, and are updated regularly to reflect changes and user suggestions.
  3. 3. Search Engine
  4. 4. Social Network The social network is a theoretical construct useful in the social sciences to study relationships between individuals, groups, organizations, or even entire societies (social units, see differentiation). The term is used to describe a social structure determined by such interactions. The ties through which any given social unit connects represent the convergence of the various social contacts of that unit. This theoretical approach is, necessarily, relational. An axiom of the social network approach to understanding social interaction is that social phenomena should be primarily conceived and investigated through the properties of relations between and within units, instead of the properties of these units themselves. Thus, one common criticism of social network theory is thatindividual agency is often ignored[6] although this may not be the case in practice (seeagent- based modeling). Precisely because many different types of relations, singular or in combination, form these network configurations, network analytics are useful to a broad range of research enterprises. In social science, these fields of study include, but are not limited to anthropology, biology, communication studies, economics, geography,information science, organizational studies, social psychology, sociology, and sociolinguistics.
  5. 5. Social Network
  6. 6. E-mail • Electronic mail, most commonly referred to as email or e-mail since ca. 1993,[2] is a method of exchanging digital messages from an author to one or more recipients. Modern email operates across the Internet or other computer networks. Some early email systems required that the author and the recipient both be online at the same time, in common with instant messaging. Today's email systems are based on a store-and-forward model. Email servers accept, forward, deliver, and store messages. Neither the users nor their computers are required to be online simultaneously; they need connect only briefly, typically to a mail server, for as long as it takes to send or receive messages. • Historically, the term electronic mail was used generically for any electronic document transmission. For example, several writers in the early 1970s used the term to describe fax document transmission.As a result, it is difficult to find the first citation for the use of the term with the more specific meaning it has today.
  7. 7. • An Internet email message consists of three components, the message envelope, the message header, and the message body. The message header contains control information, including, minimally, an originator's email address and one or more recipient addresses. Usually descriptive information is also added, such as a subject header field and a message submission date/time stamp. • Originally a text-only (ASCII) communications medium, Internet email was extended to carry, e.g. text in other character sets, multi-media content attachments, a process standardized in RFC 2045 through 2049. Collectively, these RFCs have come to be called Multipurpose Internet Mail Extensions (MIME). Subsequent RFC's have proposed standards for internationalized email addresses using UTF-8.
  8. 8. • Electronic mail predates the inception of the Internet and was in fact a crucial tool in creating it, but the history of modern, global Internet email services reaches back to the early ARPANET. Standards for encoding email messages were proposed as early as 1973 (RFC 561). Conversion from ARPANET to the Internet in the early 1980s produced the core of the current services. An email sent in the early 1970s looks quite similar to a basic text message sent on the Internet today. • Email is an information and communications technology. It uses technology to communicate a digital message over the Internet. Users use email differently, based on how they think about it. There are many software platforms available to send and receive. Popular email platforms include Gmail, Hotmail, Yahoo! Mail, Outlook, and many others.
  9. 9. • Network-based email was initially exchanged on the ARPANET in extensions to the File Transfer Protocol (FTP), but is now carried by the Simple Mail Transfer Protocol (SMTP), first published as Internet standard 10 (RFC 821) in 1982. In the process of transporting email messages between systems, SMTP communicates delivery parameters using a message envelope separate from the message (header and body) itself.

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