| 3.2 |  | Types of IP ACLs |
| 3.2.4 |  | Commented IP ACL entries |

| Good programmers use remarks liberally in their programs to describe the function of certain blocks of code. Comments make ACLs easier to understand and can be used for standard or extended IP ACLs. By describing access lists in simple terms, network engineers can quickly sum up the configuration of a router without having to sift through dozens of access list statements in an attempt to piece together its function.

Figure illustrates the commented named IP ACL command syntax.

Figure illustrates the commented numbered IP ACL command syntax.

After entering the

remark keyword, the designer can include an alphanumeric string of up to 100 characters to describe the access list. A remark statement should be entered before configuring the permits and denies. This way, the description will appear as the first entry in the configuration file. In a long list, the network administrator may want to include multiple remark statements and enter them before each part of the list that requires description. Figure illustrates proper use of the remark option.

| Lab Activity Lab Exercise: Standard, Extended, Named and Commented ACLs In this lab, students will learn how to perform the following:

- Define Standard Access Lists
- Define Extended Access Lists
- Define Named Access Lists
- Comment Access Lists
- Apply Access Lists
- Verify Access Lists