URLs and URIs

URI： Uniform resource identifiers

Used to identify Web Any type of resource accessible on （HTML, video , Audio , Procedure, etc ）

URI It's made up of three parts ：

1. The naming mechanism for accessing resources ： such as com( company )、gov( The government )、edu( Educational organization )

2. Host name of the resource （ The computer IP Number ）

3. Identify the path of the resource itself

URL： Uniform resource locator

Understood as a Internet The address of the resource , The string used to define the reference address , Used to locate the location of a resource and the protocol it uses

URL It consists of seven parts ：

1. The protocol used （HTTP,FTP）

2. Location of the server （IP）

3. Server port number （0~65535）

4. Path where the resource is located （path）

5. Parameters （ When accessing this resource , Parameter information carried ）

6. fragment （ issue HTTP Server data ）

7. login information （authority）

9. contact

URI yes URL Parent class of ,URL yes URI Subset