How many IP addresses can be configured on a given interface?

The correct answer reflects the typical configurations allowed on most Junos interfaces, where a single interface can have one primary IP address configured, and it may also support additional secondary IP addresses or subinterfaces.

In practical terms, you can configure an interface with one primary IP address plus additional IP addresses by creating a virtual LAN (VLAN) interface or a subinterface in the case of routed VLANs. This setup provides flexibility for managing different IP ranges without needing to physically add more interfaces. Depending on the device and configuration, the total number of addresses could also include one primary and one or two secondary IP addresses, leading to the conclusion that configuring up to three addresses is accurate for specific scenarios.

It's essential to note that while interfaces can support multiple IP addresses through subinterfaces, there are limits based on hardware capabilities and specific configurations. Therefore, the answer aligns with typical configurations in Junos environments, enabling effective IP address management on interfaces.