Difference between ip access-list and access-list

There are two ways to configure access list on cisco devices:

a. Using access-list command and b. Using ip access-list. The difference lies between them will make you think twice before you choose one of them.

Here is is an simple example to configure a standard access list using method a.:

Look at what you got after you delete one of the items in the access list created by method a.:

The standard access list  is gone even you only delete one of multiple access list entries!

Now look at the example below to see how to configure a standard access list using method b.:

Now look at what you got after you delete one of the items in the access list created by method b.:

This is great and provides more flexibility in designing and managing access lists. 

Besides, using ip access-list also gives you the option to design named access list.