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Definition of HyperText Transfer Protocol How HTTP works How Websites work GoDaddy.com OSI Model Networking

 Hypertext Transfer Protocol ( HTTP ) is a communications protocol used to transfer or convey information on intranets and the World Wide Web.  Its original purpose was to provide a way to publish and retrieve hypertext pages.  Developed by the W3C and IETF

 Step 1: Parsing the URL  Getting ahold of document  Step 2: Sending the request  GETrequest-URI HTTP/version  Step 3: The server response  Located appropriate document and return it

 Domain Names  A simple file that attached with a name that mapped itself to a particular IP address.  Network Information Center  Made it easier to establish links with other computers  Godaddy Godaddy  Internet Protocol  The language computers use to communicated over the internet

 A website is typically a collection of web pages, graphics, and other elements which are linked together to form a larger, structured document (like an interactive book).  All pages and other elements are placed in a folder on a host server.  An internet address (URL) is assigned to this folder, so that when a browser asks for your site it will know where to look.

 Open Systems Interconnection Basic Reference Model or OSI Seven Layer Model  OSI Model is a layered, abstract description for communications and computer network protocol design, developed as part of the Open Systems Interconnection (OSI) initiative.  7 Layers of the OSI Model: 7.Application 6.Presentation 5.Session 4.Transport 3.Network 2.Data Link 1.Physical

 Application Layer  Interfaces directly to and performs common application services for the application processes.  It also issues requests to the Presentation layer.  Network process to application.  Presentation layer  Responsible for the delivery and formatting of information to the application layer for further processing or display.  Data representation and encryption.  Session Layer  Controls the dialogues/connections (sessions) between computers.  It establishes, manages and terminates the connections between the local and remote application.  Interhost communication.

 Transport Layer  Provides transparent transfer of data between end users, providing reliable data transfer services to the upper layers.  End-to-end connections and reliability (TCP)  Network Layer  Provides the functional and procedural means of transferring variable length data sequences from a source to a destination via one or more networks while maintaining the quality of service requested by the Transport layer.  Path determination and logical addressing (IP)

 Data Link Layer  Provides the functional and procedural means to transfer data between network entities and to detect and possibly correct errors that may occur in the Physical layer.  Physical addressing (MAC & LLC)  Physical Layer  The physical layer is the most basic network layer, providing only the means of transmitting raw bits rather than packets over a physical data link connecting network nodes.  Media, signal and binary transmission  ACTIVITY

 Definition: The communications media, devices, and software needed to connect two or more computer systems or devices.  Network Nodes  Networking Trends  Increasing among businesses

 Personal Area Network (PAN)  Local Area Network (LAN)  Metropolitan Area Network (MAN)  Wide Area Networks (WAN)  International Networks  Network Topology Network Topology  Logical model that describes how networks are structured or configured.

Information Covered Definition of HyperText Transfer Protocol How HTTP works How Websites work GoDaddy.com OSI Model Networking

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