In a complex network environment, the unstructured network troubleshooting process may result in a new fault, making network troubleshooting more difficult.

Which of the following does not require customers' signing in a migration project?

Which of the following subsystems are involved in building cabling? (Multiple Choice)

Which of the following WAN links are used on a packet switched network? (Multiple Choice)

Compared with a three-layer network architecture, a two-layer network architecture has simple topology and high data forwarding efficiency. The network architecture will transform to the two-layer architecture, and the three-layer network architecture will be gradually phased out.