問題文
An M Series router is the source-side designated router for an encoder that is attached to it, and the same router is the rendezvous point for the group that the encoder feeds. The router carries no tunnel services hardware of any kind, and yet receivers elsewhere in the sparse-mode domain get the stream. The team asks whether the design is sound or whether they have been lucky. Which reading is correct?
選択肢
- The software interfaces that the protocol raises on its own stand in for the hardware ones, so hardware of this kind is asked for by the data of a group and not by a register message.
- A source-side device that is itself the rendezvous point has no register message to build, so the hardware is out of the picture for this router.
- Hardware of this kind is asked for on the receiver-side device instead, so the team has it in the right place already and the source side of the domain did not have a use for it.
- A register message is built by the routing engine while the hardware is away, at a rate that a design cannot exceed, so the stream holds up while the encoder stays slow.