what is cdn code example

Example 1: cd command

The cd command can be used to change into a subdirectory,

cd subdirectory_name						-> To go one level into subdir
cd subdirectory_name/subsubdirectory_name	-> To go two levels into subdir

move back into the parent directory,

cd ..\       -> To go back one level
cd ..\..\    -> To go back two levels

move to previos directory,

cd -

move all the way back to the root directory or move to any
given directory

cd C:/Give_Path_to_directory

Example 2: what is integrity cdn

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" 
rel="stylesheet" 
integrity="sha256-MfvZlkHCEqatNoGiOXveE8FIwMzZg4W85qfrfIFBfYc= sha512-dTfge/zgoMYpP7QbHy4gWMEGsbsdZeCXz7irItjcC3sPUFtf0kuFbDz/ixG7ArTxmDjLXDmezHubeNikyKGVyQ==" 
crossorigin="anonymous">