# URLs and Loading the Webpage
###### tags: `elearning` `Multimedia Wireless Network`
###### Note Page : [:link:](https://hackmd.io/@YTL0307/HJEb6jWCo)

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## **URLs**
- URL stands for Uniform Resource Locator and is the address of a Webpage on the Internet.
- URL : http://www.juniper.net/training/course-description.html.

### **The First Part**
- A URL starting with FTP colon slash slash tells the browser it is going to use FTP to transfer a file to the server.
- HTIPS colon slash slash simply means that the browser is using a secure connection with the webserver.
- The data sent over the connection is encrypted. HTTPS stands for Hypertext Transfer Protocol Secure.

### **The Second Part**
- The second part of the URL, www.juniper.net, is the domain name of the webserver.

### **The Last Part**
- The last part of the URL is the path, which in this case is slash training slash course-description.html.
- The path refers to a file or the location of the file on the webserver.
- In this example, the browser needs to go the file directory slash training, and locate the file named course-description. html.

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## **Loading the Webpage**
- What specifically happens in the process of loading a Webpage?
- After the user types in the URL and the client uses DNS to determine the webserver's IP address, the client must establish a TCP connection with the webserver.
- The client starts the process of connecting to the webserver by sending the segment down its network stack, and the receiving device sends it back up the stack where the Transport Layer strips off the Layer 3 header to get to the segment.