In the network shown in the figure, PC1 and PC2 are required to belong to the same VLAN, but cannot communicate at Layer 2. Which of the following technologies can be used to achieve this?
(Multiple choice)

Network engineers found that the multicast client could not receive multicast data correctly, so they suspected that the group address set by the multicast server was wrong. Which of the following cannot be the group address?

In the OSPF network shown in the figure, area 1 is the MS5A area, area 2 is the Stub area, and R4 imports the external route 10.0.4.4/32. The Router ID of each device is 10.0.XX, where X is the device number. The "asbr-summary 10.0.4.0 255.255.255.0" command is configured in the OSPF process of R1 and R3. Please match the route entries in the following routing table with the routers.

In the OSPFv3 network shown in the figure, the interconnected ports of R1, R2, and R3 have OSPFv3 enabled, and the Router ID of each device is 10.0.XX, where x is the device number.
Check the detailed information of a certain LSA on R3, and you can infer from the output information that R1 and R2 are DRs in the network.

As shown in the figure, S73 is the user gateway and DHCP Relay in the network. The administrator plans to deploy the DHCP Snooping function on S73 to prevent DHCP attacks.
Which of the following commands does not need to be configured on ST3?