When the H3C AP is directly connected to a wireless switch or connected through a Layer 2 network, the correct registration steps are?
1. The AP sends out a Layer 2 broadcast discovery request message to try to contact a wireless switch
2. The AP downloads the latest software version and configuration from the wireless switch
3. The wireless switch that receives the discovery request message will check whether the AP has the permission to access the machine, and if so, it will respond with a discovery response
4. The AP obtains an IP address through the DHCP server
5. The AP starts to work normally and exchanges user data packets with the wireless switch