Different types of URL in salesforce.

 

1.         https://developer.salesforce.com/

--It is used to create full developer account.

2. https://login.salesforce.com/

--It is used to login into the salesforce environment.

3. https://test.salesforce.com/

Used for sandbox

--It is used to develop the salesforce application and much more...

4. https://trust.salesforce.com/en/

--It is used to check the sever status.