Which type of interface name indicates the number of units in a Juniper device?

Logical interfaces are associated with the configuration of units within a Juniper device. When you see an interface name that includes units, such as 'ge-0/0/0.0' where the final section indicates the unit number, it signifies that this interface can be subdivided into multiple logical segments or interfaces. Each logical interface can be configured individually, allowing for greater flexibility in managing network resources and traffic.

In contrast, physical interfaces represent the actual hardware ports on the device, without designation for multiple units. Virtual interfaces may refer to interfaces that do not correspond to specific hardware, while aggregate interfaces typically group several physical interfaces into a single logical interface for purposes like load balancing or redundancy. Therefore, logical interfaces are uniquely positioned to denote the number of sub-units or logical divisions available on the device.