Which command allows RSTP interface ge-0/0/9 to transition states immediately when a host is plugged in?

The purpose of Rapid Spanning Tree Protocol (RSTP) is to enable fast convergence in the network by quickly transitioning ports through different states (e.g., listening, learning, forwarding) when network topology changes occur. When a host is plugged into an RSTP-enabled interface, specific configurations can help the interface transition to a forwarding state more quickly.

The correct command allows the interface to be treated as a direct connection to a single endpoint (as opposed to a shared medium), which enables rapid state transitions necessary for efficient connectivity. By configuring the interface with a mode indicating it operates in a point-to-point manner, it signifies that only one device is connected directly to the port. RSTP can then bypass certain transitions and immediately place the port into a forwarding state when a device is detected on the link, thus reducing downtime.

The other command options do not align correctly with the requirement for immediate state transition. For instance, configuring an interface as an edge port (another possible configuration for fast transitions) is done using a different command and serves a similar purpose in a slightly different context. Modes such as shared or portfast do not align directly with RSTP functionality in the way that designating a port as point-to-point does. Therefore, configuring the