問題文
On a segment where the forwarder has already been settled, one device receives a new Ethernet segment route for that same segment. On a second device, whose link toward the server had failed while it was not the forwarder, that link comes back up. An engineer has to say, for each of the two events, whether the device waits before it works out the forwarder again. Which statement is correct?
選択肢
- Both of them start the wait, since no event that leads to a fresh choice of forwarder is allowed to run without it, which is how the devices on one segment are kept synchronized with each other.
- The wait is not started by either of them, and what starts it is giving a link an identifier and the device reaching the core.
- The new route starts the wait but the link coming back does not, because a device that has lost a link already knows the value the others on the segment are counting down.
- The link coming back starts the wait, while a route that arrives after the choice has been settled is held in a queue until the next event of any kind wakes the process up again.