After determining that the frequency or channel appears to be no longer in use
After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
第1题：
24． Which of the following is TRUE?
A． When he talks or sings, Jay Chou can both speak clearly．
B． When he sings, Jay Chou can-t speak clearly． When he talks, he can't, either．
C． When he talks, Jay Chou can-t speak clearly． But when he sings, he can．
D． When he sings, Jay Chou can't speak clearly． But when he talks, he can．
第2题：
A. could stay
B. could have stayed
C. can stay
D. must have stayed
第3题：
Input into the Communications Management Plan includes the following information from the stakeholder analysis:
A Information needs
B Information content
C Frequency of distribution
D Method of distribution
E All of the above
第4题：
When can routine communications be resumed on a frequency or channel on which radio silence has been imposed ________．
A.After determining that the frequency or channel appears to be no longer in use
B.After determining that geographic distance from the distress situation will prohibit any other signal from interfering with emergency communications
C.After the Rescue Coordination Center transmits a message on the frequency or channel being used for emergency communications stating that such traffic has concluded
D.Routine communications can resume if，in the Master's opinion，communications on that frequency or channel will not interfere with emergency communications
第5题：
A. A system log message is generated, confirming the transfer attempt.
B. The destination filename format can be altered by configuration.
C. The frequency the system archives the configuration cannot be changed.
D. An archive log is created to track transfer attempts, both failed and successful.
第6题：
The maximum data rate of any single wireless link can be described by the shannon’s theorem which is related to the（）in hertz，and the（）on the channel
A．signal frequency B．bandwidth C．carrier frequency D．noise frequency A．signal B．caeeier C．noise D．data signal
第7题：
In(71), multiple transmission can occupy a single link sectioned by time rather than frequency.
A．FDM
B．TDM
C．WDM
D．CDM
第8题：
75 Input into the Communications Management Plan includes the following information from the stakeholder analysis:
A. Information needs
B. Information content
C. Frequency of distribution
D. Method of distribution
E. All of the above
第9题：
What is meant by the term“radio silence”________．
A.Stations not directly involved with the on-going distress communications may not transmit on the distress frequency or channel
B.Stations remaining off the air to safeguard proprietary information
C.Two three-minute silent periods，at 15 and 45 minutes after the hour，that provide a transmitting“window”for distressed vessels to transmit distress alerts using J3E
D.Communications on a distress frequency or channel is banned for 24 hours following the cessation of the distress traffic
第10题：
When considering the default behavior of Junos platforms, which statement is true about archiving configurations?（）