In the switching network as shown in the figure, VLAN10 is set as Isolate-user-vlan on the switch SWA, VLAN2 and VLAN3 are set as the Secondary VLAN of VLAN 10; VLAN2? VLAN20 is created on the switch SWB, and VLAN20 is set as Isolate-user-vlan , VLAN4 is VLAN20 Secondary VLA after setting the IP address of each device as shown in the figure, if the local ARP proxy function is enabled on both SWA and SWB, and both SWA and SWB are allowed to send ICMP packets, then on PCA Run the tracert 10.1.1.2 command, the PCA shows that the destination IP address reached by the first hop is

Among the following PIMV2 messages, the destination address is a unicast address:

In the network as shown in the figure, after completing the corresponding configuration on the switch SWA, when the switch SWA receives the data frame from the PCA to access the PCB, it will judge whether to check the MAC address table or the routing table according to it.

The customer requires that during network design, there must be high-reliability equipment in key parts, and the reliability of the equipment should reach 99.999%.

The following are functions of the convergence layer (choose one or more)