There are multiple IGMPv2 group member hosts (Client1/Client2/Client3) in the shared network segment, and multiple IGMPv2 routers (Router1/Router2), as shown in the following figure:
192.168.207.254 192.168.207.253
Router1 Router2
+++++
Clientl Client2 Client3
192.168.207.1 192.168.207.2192.168.207.3
So, the following statement is correct

In the network as shown in the figure, the corresponding configuration is completed on the switch SWA, and the switch SWA and each PC have learned the corresponding ARP entry. The PCA visited the PCB and sent an ICMP request message, and the switch SWA forwarded this message to the PCB. When the source IP address of the packet is

As shown in the figure, initially SWA is connected to SWB through E0/1, and SWB is connected to SWC through port E0/2. SWA and SWC are not directly connected. After enabling STP and waiting for its convergence, connect SWA to SWC, which leads to the switch port The change of STP status, the correct description of this change is

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.

Which of the following aspects should be considered for the security of the campus network?