問題文
A pair of devices runs one small check on each member of a bundle, and the checks have just started to come up. An engineer has to record how long the reserved group destination goes on being used once a check has come up, and what the specification says about the periods that the checks on the members of one bundle carry. Which statement is correct?
選択肢
- The reserved group address stays in use for the first few packets once the check comes up, and the periods used on the members of one bundle are free to differ among themselves.
- The reserved group address stays in use for the first few packets once the check comes up, and the periods used on the members of one bundle are obliged to differ among themselves.
- The reserved group address stays in use for the closing few packets once the check comes up, and the periods used on the members of one bundle are free to differ among themselves.
- The reserved group address stays in use for the closing few packets once the check comes up, and the periods used on the members of one bundle are obliged to differ among themselves.