Cisco Certified Network Associate (CCNA) Practice Exam

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Which command would you use to confirm the definition of an extended ACL?

show ip access-list
show access-lists
display access-list
show extended access-list

The correct answer is: show ip access-list

The command that is used to confirm the definition of an extended ACL is "show ip access-list." This command provides a detailed list of all the access control lists, including both standard and extended ACLs, along with their rules and configurations. By using this command, you can view specific details related to each entry in the ACL, such as the permit or deny conditions, source and destination addresses, and any associated protocol information. The other options are not valid commands in the context of viewing access-list definitions on Cisco devices. "Show access-lists" is more generic and may not specifically target extended access-lists, while "display access-list" does not correspond to a recognized command in Cisco's IOS syntax. "Show extended access-list" is also not a valid command, as Cisco uses "show ip access-list" for this purpose. Therefore, utilizing "show ip access-list" is the best approach to confirm the configuration of extended ACLs.