問題文
A campus gathers several VLANs of one wireless network into a group and names one VLAN of that group as the one that carries traffic for groups of listeners. Clients that sit in different VLANs of the group all listen to one and the same group address. What does the guide give as the result of that arrangement?
選択肢
- One number is built for the whole of the group, so a single stream reaches the group of VLANs and the router above the campus holds one entry that stands for every VLAN in it.
- One number is built for each listener, so a stream reaches the group once over for every client that asked for it and the router above the campus holds an entry for the VLANs in the group taken singly.
- One number is built for the whole of the group, so a single stream reaches the group of VLANs while the router above the campus still holds one entry for each VLAN in it.
- One number is built for each VLAN of the group, so a stream reaches the group once over for every VLAN in it and the router above the campus holds an entry for those VLANs one by one.