Cisco Certified Network Associate (CCNA) Practice Exam

In PPPoE setup, what command keeps the physical interface IP address from being assigned?

1. no ip address

2. ip address none

3. clear ip address

4. disable ip address

The correct answer is: no ip address

In a PPPoE (Point-to-Point Protocol over Ethernet) setup, the command that prevents the physical interface from being assigned an IP address is "no ip address." This command effectively indicates to the router that it should not assign any IP address to the specified interface. When configuring PPPoE, the IP address is typically assigned dynamically through the PPPoE session itself, rather than being statically assigned to the physical interface. By using "no ip address," you ensure that once the PPPoE session is established, the interface will receive its IP address from the PPPoE server instead of having a conflicting static IP address configured on the physical interface. This allows for a smoother integration with dynamic IP assignment and helps to avoid misconfiguration that could lead to network connectivity issues. The other options do not accurately reflect the command used in this context, as they either do not exist in Cisco IOS or do not serve the same purpose in preventing an IP address assignment on the physical interface.