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TCP/IP Protocols

Hypertext Transfer Protocol (HTTP)

– Web servers implement this protocol. Short for HyperText Transfer Protocol, the underlying protocol used by the World Wide Web. HTTP defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands. For example, when you enter a URL in your browser, this actually sends an HTTP command to the Web server directing it to fetch and transmit the requested Web page.

Simple Mail Transfer Protocol (SMTP)

– Used by e-mail servers (and sometimes Web servers) to send e-mail. Short for Simple Mail Transfer Protocol, a protocol for sending e-mail messages between servers. Most e-mail systems that send mail over the Internet use SMTP to send messages from one server to another; the messages can then be retrieved with an e-mail client using either POP or IMAP. In addition, SMTP is generally used to send messages from a mail client to a mail server. This is why you need to specify both the POP or IMAP server and the SMTP server when you configure your e-mail application.

Post Office Protocol Version 3 (POP3)

– A protocol used to retrieve e-mail from a mail server. Most e-mail applications (sometimes called an e-mail client) use the POP protocol, although some can use the newer IMAP (Internet Message Access Protocol).
– There are two versions of POP. The first, called POP2, became a standard in the mid-80′s and requires SMTP to send messages. The newer version, POP3, can be used with or without SMTP.

File Transfer Protocol (FTP)

– The protocol for exchanging files over the Internet. FTP works in the same way as HTTP for transferring Web pages from a server to a user’s browser and SMTP for transferring electronic mail across the Internet in that, like these technologies, FTP uses the Internet’s TCP/IP protocols to enable data transfer.
– FTP is most commonly used to download a file from a server using the Internet or to upload a file to a server (e.g., uploading a Web page file to a server).

DNS

– Short for Domain Name System (or Service or Server), an Internet service that translates domain names into IP addresses. Because domain names are alphabetic, they’re easier to remember. The Internet however, is really based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. For example, the domain name www.example.com might translate to 198.105.232.4.
– The DNS system is, in fact, its own network. If one DNS server doesn’t know how to translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.

Transmission Control Protocol (TCP)

– Creates a reliable connection between two computers. TCP is one of the main protocols in TCP/IP networks. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and also guarantees that packets will be delivered in the same order in which they were sent.

Internet Protocol (IP)

– Provides addressing scheme.. IP specifies the format of packets, also called datagrams, and the addressing scheme. Most networks combine IP with a higher-level protocol called Transmission Control Protocol (TCP), which establishes a virtual connection between a destination and a source.
– IP by itself is something like the postal system. It allows you to address a package and drop it in the system, but there’s no direct link between you and the recipient. TCP/IP, on the other hand, establishes a connection between two hosts so that they can send messages back and forth for a period of time.
– The current version of IP is IPv4. A new version, called IPv6 or IPng, is under development.

TCP/IP Model PPT Contents:

  • Communications Protocol
  • TCP/IP Protocols
  • Hypertext Transfer Protocol (HTTP)
  • Simple Mail Transfer Protocol (SMTP)
  • Post Office Protocol Version 3 (POP3)
  • File Transfer Protocol (FTP)
  • DNS
  • Transmission Control Protocol (TCP)
  • Internet Protocol (IP)
  • and more

Download TCP/IP Model PPT

Filename : TCP/IP Model PPT
Added :11 August, 2012 (11:51)
Category : Electronics and Communication
Posted by :tukimin

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Pingback from Introduction to Internet PPT Free Download – pptfreedownload.Com
Time September 22, 2012 at 1:23 am

[...] existing network need to pay a small registration fee and agree to certain standards based on the TCP/IP (Transmission Control Protocol/Internet Protocol) [...]

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