問題文
A controller has to hand a stream that is bound for a group of listeners down to its access points. The wired network between the two carries no route for traffic of that shape, and the access points sit in subnets other than the one that holds the interface which manages the wireless side. Which of the two ways of handing the stream down does the guide call for, and what does it grant about that way?
選択肢
- The way that hands the packets to one group address which the access points listen for, and the guide grants in the same breath that the way leaves the work of making the copies with the controller rather than with the network.
- Either of the two ways serves here, and the guide grants that the choice comes down to the size of the site because the two of them rest on the same route through the wired network between the controller and the units.
- The way that sends a copy of every packet to each access point in turn, and the guide grants in the same breath that the way is wasteful and raises a great deal of extra traffic for the controller as well as for the network.
- Neither of the two ways serves here, and the guide grants that a design of this shape has to place the traffic of the clients on the wired side at each site so that the stream never has to cross the controller at all.