問題文
A guest network with a sign on page lists four servers that answer logins and two more that keep the usage records. A power cut at the data center takes both of the record servers off the network while the four that answer logins keep working. The team has to tell the front desk what visitors will see. What happens to a visitor who signs on during that time?
選択肢
- The visitor gets on and each record is sent one time without any retry because a record that goes missing has no bearing on the session that it describes
- The visitor is turned away because the setting that governs a total outage is read for the record servers as well and it stands at refusal until one of them answers again
- The visitor gets on as usual because the pattern for sending a record again is the same as for a login while the setting that governs a total outage is never read for the record servers at all
- The visitor gets on and is given the special session of one hour that the other value of the outage setting hands out because no record can be written for a session of any greater length