Which of the following 7900 single-board software function descriptions are correct?

The software management module in the board is used to manage signaling protocols such as OSPF/1588V2

The performance and alarm module is mainly used to check the alarm and performance of the single board, and report it to the main control board

QoS, PwE3, L3VPN and other services are implemented by the service management module

The basic framework of the single board provides basic system support, including memory management, process/thread management