Which of the following about the process of queuing self-generated traffic in the Nokia 7750 SR is TRUE?

Self-generated traffic originates from the Control Plane Module (CPM) and is considered egress traffic from the control plane's perspective. This traffic is sent to an Input/Output Module (IOM) where it is placed into egress hardware queues for scheduling and transmission out of a physical port. Conversely, traffic from the network destined for the control plane is considered ingress traffic. While this traffic is first policed by hardware mechanisms on the ingress IOM to protect the CPU, it is ultimately forwarded to the CPM. Upon arrival at the CPM, the traffic is placed into software queues for processing by the relevant protocol or management application. Thus, ingress traffic is stored in CPM queues and egress traffic in IOM queues.

A. This option incorrectly reverses the roles. Egress (self-generated) traffic is queued on the IOM for transmission, not the CPM.
C. This is incorrect. Egress self-generated traffic must be queued on the IOM before it can be transmitted out of a physical port.
D. This is incorrect. While the IOM handles hardware queuing, ingress traffic destined for the CPU is ultimately buffered and processed in software queues on the CPM.

1. Nokia 7750 SR OS Quality of Service Guide, Release 21.10.R1, Section: QoS for Self-Generated Traffic. This section states, "Self-generated traffic is associated with the appropriate egress queue and is scheduled along with other traffic." This confirms that egress (self-generated) traffic is queued on the IOM.

2. Nokia 7750 SR OS Quality of Service Guide, Release 21.10.R1, Section: CPU Protection and Management. This section describes the mechanisms on the IOM that police and regulate traffic flow to the CPM. It notes that after being policed on the IOM, traffic is sent to the CPM for processing, which implies the use of software buffers and queues on the CPM itself to handle the incoming packets.