Which portion of the show interface command output indicates a congested interface?

The portion of the show interface command output that indicates a congested interface is the output queue drops. When an interface experiences congestion, it is unable to send packets at the rate they are being generated by the source. In such circumstances, if the output queue is full, additional packets will be dropped because they cannot be buffered. This is a clear indication that the interface is experiencing congestion, as it signifies that the device has reached its capacity to transmit packets and cannot accommodate any more until the current queued packets are processed and transmitted.

Understanding this concept is crucial for network professionals, as it highlights performance bottlenecks and the need for potential solutions, such as upgrading interface capabilities or optimizing traffic patterns. Input queue drops and error packets signify different issues related to incoming traffic or interface malfunctions, while broadcast packets do not directly indicate congestion but rather the nature of network traffic.