The Ethernet switch works inOSIWhich layer of the reference model?

The international professional organization responsible for allocating IP addresses has divided several network segments as private network segments, which can be freely distributed and used by people on private networks. Which of the following is not a network segment of private addresses?

Is the following description correct? It is impossible for a route in the routing table to have a mask of0.0.0.0Routing items.

The router mainly works inOSIWhich layer in the model?

In the EPON network, what management and maintenance channel does the OLT use to configure and maintain terminal equipment?