IP BROS Presentation by: Amen Ahmed

Mario and Luigi are here to help us find our way through the internet. Mario will act as our browser and Luigi will act as our data. Mario wants to pull up our company’s webpage LPCORP.COM First, he will type our website name or URL into his favorite browser. Some common web browsers are Internet Explorer, Fire Fox, Google Chrome and Safari.

Before Mario can reach our company server to find our webpage, he needs our address. Mario’s computer will send a request for our IP address. The request will first travel through Mario’s router, which will in turn route the request to his Internet Service Provider (ISP) Every computer on a network has a unique IP address similar to your home address. IP addresses can be difficult to remember. They usually look something like this: We use Domain Name System (DNS) Servers to store IP addresses alongside simple to remember website names similar to a telephone book. Mario’s ISP will then look through DNS servers to find the IP address for the requested URL and return the address to Mario. LPCORP.COM IP Address Request Return IP Address( ) Receive IP Address( )

Now that Mario has our IP Address, he can find our company’s web server! Before he can pull up a webpage or information from our servers, he will have to make the connection. To make the connection, he will have to go through his ISP again, who will in turn connect him to the internet. (network of networks) To understand the process of sending and receiving data through a network, we must first understand the Open Systems Interconnection (OSI) model. Application Presentation Session Transport Network Data Link Physical Web browser; means to contact webserver Converts files stored on servers to formats used to display them in web browser. (HTTP) TCP connections to web servers. Breaks webpage into chunks and labels them. Mean for locating webservers. Creates message addressed to server with return IP. Request is sent to network card. Converted into a message. Means to transmit the webpage request to default gateway. Transports chunks of data across sessions. Request for webpage via OSI model

Luigi is now on his way to our company server! After traveling through the 7 Layer OSI model, he will enter the router. The router will read the IP addresses of the envelopes his chunks were packaged in to and route him accordingly. Receive webpage request COMPANY ISP When his ISP receives the request it will connect him to our company’s ISP and then to our server to retrieve our webpage. ISP

COMPANY ISP The webpage will then go back through the 7 layers of the OSI model, to our company’s ISP, to the client’s IPS, to the client’s router and then to Mario who will display it on the client’s computer.

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