問題文
An administrator gives a cluster an explicit address in the form of a name that resolves to the address of each server of the cluster. Which requirement does that form place on the members of the cluster, and why?
選択肢
- Each member needs an address of its own and a port number of its own, because the address of the cluster is rebuilt at each request and no pairing can be settled beforehand
- Each member needs the same address as the rest and the same port number, because the name of the cluster stands in for the pairing and the servers are told apart by the identifier the domain gives them
- Each member needs an address of its own and the same port number as the rest, because a name resolving to several addresses carries no port number and each member still needs a pairing that no other member holds
- Each member needs the same address as the rest and a port number of its own, because a name resolving to several addresses carries a single address and each member still needs a pairing that no other member holds