Presentation on theme: "Terms to Remember. HTTP Is a request-response protocol. For example, a Web browser initiates a request to a server, typically by opening a TCP/IP connection."— Presentation transcript:
Terms to Remember
HTTP Is a request-response protocol. For example, a Web browser initiates a request to a server, typically by opening a TCP/IP connection. The request itself comprises : o a request line, o a set of request headers, and o an entity. The server sends a response that comprises o a status line, o a set of response headers, and o an entity. The entity in the request or response can be thought of simply as the payload, which may be binary data. The other items are readable ASCII characters. When the response has been completed, either the browser or the server may terminate the TCP/IP connection, or the browser can send another request.
HTML stands for hyper-text-markup-language and is simply a set of rules using tags that are used to describe how one wants a web page to look. The following is a simple page written in html: This is my first web page This is the body of the document. This is bold text. This is underlined text. Special tags with angle brackets are used to outline a web page. Web browsers are interpreters for the HTML language. When a web browser like Internet Explorer or Netscape Navigator opens a ".html" file it reads all the tags and then displays its own interpretation of the page. Read more:
* First artificial satellite launched by the Soviet Union (USSR). * Sputnik One paved the way to scientific, political, military and TECHNOLOGIVAL developments. * This also marked the start of the space age race between the United States and the U.S.S.R
* ARPANET is the first Internet. * They connected 4 nodes using 4 universities in the United States of America. * Established in 1969
* Or The Web * Or The Internet * It is the inter-connection of hypertext files.
* is a company that provides a subscriber with access to the Internet.
* first conceived the idea for a distributed, packet switching network, built on the premise that communication on the network would be unreliable.network * The network was designed to be able to operate after a nuclear attack had wiped out large portions of the network.
* Modulator – Converts digital signals to analogue * Demodulator – Converts analogue signals to digital signals.
* Digital Subscriber Line. * Requires special switch to be installed in your phone companys routing station. * Limit of 4 Mile Radius (the ISP should be within the range) * Uses the same phoneline but do not interrupt the other line. * Expensive * Offer more bandwidth for uploading or downloading (up- streaming or down-streaming). The most common is 256K/sec or 1Mb/Second * Asynchronous Digital Subscriber Line * upstream bandwidth is smaller than the downstream. * 4 Mile Radius * Generally more affordable than DSL. * Bandwidth 96Kb/second upstream and 1Mb/Second
* 1 bit = a single digit, either 1 or 0 * 8 bits = 1 byte, a combination of 1's and 0's * 1024 Bytes = 1 KB (kilobyte) * 1024 Kilobytes = 1 MB (megabyte) * 1024 Megabytes = 1 GB (gigabyte) * 1024 Gigabytes = 1 TB (terabyte) * 1024 Terabytes = ????
* Wireless Local Area Network or most popularly known as WIFI. * a local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet; uses Ethernet protocol.
* The TIA/EIA 568B straight through cable consists of four pairs of twisted pair lines. These ethernet cables can be shielded twisted pairs (STP); screened twisted pairs (ScTP); or most commonly, unshielded twisted pairs (UTP). The twisted pairs serve to cancel out the any RF/EM (radio- frequency/electromagnetic) noise through the lines.
Any area were you can access a network. It can be wired or wireless.