フリー問題

問題文

An exchange point member runs the loose form of the check that compares a source address against the routing table, and the discovery of the largest packet a path will carry has stopped working for traffic crossing that exchange. An engineer has to record what every network that may source such traffic needs to hold, and the easiest way to have that reachability announced. Which statement is correct?

選択肢

1. Each of them needs a route for the exchange prefix or a coarser one covering it, and the easiest way is for the exchange itself to originate that prefix and advertise it to the whole membership.
2. Each of them needs a route for the exchange prefix or a narrower one underneath it, and the easiest way is for the exchange itself to originate that prefix and advertise it to the whole membership.
3. Each of them needs a route for the exchange prefix or a narrower one underneath it, and the easiest way is for the exchange itself to originate that prefix and advertise it to a solitary participant.
4. Each of them needs a route for the exchange prefix or a coarser one covering it, and the easiest way is for the exchange itself to originate that prefix and advertise it to a solitary participant.