Buoys which mark isolated dangers are painted with alternating（）.

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• Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE? （）

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• Which two QoS classification and marking statements are true？ （）

  A .  In a Frame Relay network， delay sensitive traffic is tagged with the discard eligible （DE） bit. B .  In an MPLS network， the three most significant bits of the DSCP or the IP precedence of the IP packet are copied into the MPLS EXP field. C .  In an MPLS network， the MPLS EXP bits are used to identify up to 16 CoS values. D .  The differentiated services code point （DSCP） field consists of the first three bits of the IP precedence field in the header of an IP packet. E .  The 802.1Q standard uses a three bit field referred to as the user priority bits （PRI） to mark packets as belonging to a specific CoS.

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• （）gives a description of the combined Cardinal and Lateral Buoyage system including textual and diagrammatic explanations of the five types of marks;lateral;cardinal,isolated danger;safe water and special marks.

  A . Ocean Passages for the World B . Symbols and Abbreviations used on Admiralty Charts，Chart 5011 C . IALA Maritime Buoyage System D . The Mariners Handbook

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  A .  ISL B .  IVR C .  VoQ D .  VSANs E .  Enhanced ISL

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