Cisco Certified Network Associate (CCNA) Practice Exam 2026 – The Comprehensive All-in-One Guide to Exam Success!

The command used to create a PPPoE (Point-to-Point Protocol over Ethernet) dialer interface is "interface dialer0." This command is employed in the router's command-line interface to enter the appropriate configuration mode for the dialer interface.

By issuing this command, the router recognizes that you are configuring a dialer interface, specifically dialing over an Ethernet connection, which is essential for establishing a PPPoE connection. Once in this mode, additional configurations can be applied, such as IP addressing, encapsulation type, and other settings specific to PPPoE.

The other options do not represent valid syntax for creating a PPPoE dialer interface in Cisco IOS. Option "dialer interface 0" is not the correct command structure recognized by the Cisco IOS command line. "create dialer interface" is not a recognized command for this operation, and "set interface dialer0" is also not valid syntax for accessing or creating a dialer interface. Understanding the correct command structure is crucial for network configuration and proper functioning of methods like PPPoE, which is commonly used in broadband connections.