[单项选择]The use of this rule does not relieve vessels（）their obligations to comply with the local laws.
A. from
B. of
C. off
D. over

[单项选择]This Rule does not relieve the give-way vessel（）her obligation to keep out of the way.
A. out
B. off
C. from
D. of

[单项选择]It is dangerous for vessels without the use of radar（）the estuary.
A. to get
B. to approach
C. to proceed
D. to close

[单项选择]It is danger for vessels without the use of（）to approach the estuary in such poor visibility.
A. Loran C
B. Direction Finder
C. Gyro- compass
D. Radar

[单项选择]Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?（）
A. The address is removed from the pool until the conflict is resolved.
B. The address remains in the pool until the conflict is resolved.
C. Only the IP detected by Gratuitous ARP is removed from the pool.
D. Only the IP detected by Ping is removed from the pool.
E. The IP will be shown, even after the conflict is resolved.

[单项选择]Vessels in port may use（）for receiving typhoon warnings during the typhoon season.
A. their transmitters
B. their receivers
C. their radars
D. their lorans

[单项选择]Which network protocol does DNS use?（）
A. FTP
B. TFTP
C. TCP
D. UDP
E. SCP

[单项选择]Which of these ports does syslog use to send messages to a syslog server?（）
A. TCP502
B. TCP514
C. TCP520
D. UDP502
E. UDP514
F. UDP520

[单项选择]How does ERS use the VLAN tag?（）
A. to provide service internetworking
B. to support transparency for Layer 2 frames
C. as a connection identifier to indicate destination
D. as a mapping to the DLCI in service internetworking
E. to provide a trunk by which all VLANs can navigate from one site to one or multiple sites

[单项选择]When anchoring,it is a common rule of thumb to use a length of chain（）.
A. five to seven times the depth of water
B. seven to ten times the depth of water
C. twice the depth of water
D. twice the depth of water plus the range of tide

[单项选择]What language does International NAVTEX use?（）
A. Russian
B. French
C. English
D. German

[多项选择]Why does the data communication industry use the layered OSI reference model (Choose two.)（）。
A. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.
B. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.
C. It supports theevolution of multiple competing standards, and thus provides business opportunities for equipment manufacturers.
D. It encourages industry standardization by defining what functions occur at each layer of the model.
E. It provides a means by which changes in functionality in one layer require changes in other layers.

[单项选择]Vessels，（）support vessels，should not enter the safety zone of a deepwater port unless clearance has been obtained from the Vessel Traffic Supervisor.
A. besides
B. excepted
C. otherwise
D. other than

[单项选择]Required lifesaving equipment on existing vessels may becontinued in use on the vessel if（）.
A. kept on board no more than 2 years
B. inspected and serviced every 6 months
C. destroyed if more than 5 years old
D. maintained in good and serviceable condition

[单项选择]Vessels transiting Suez Canal are charged according to their（）.
A. gross tonnage
B. Suez Canal tonnage's
C. net tonnage's
D. Panama Canal tonnage's

[单项选择]The regulations require that inspected vessels on an international voyage，other than small passenger vessels，must carry which of the following distress signals on or near the navigating bridge?（）
A. 12 hand red flares
B. 12 rocket parachute flares
C. 12 hand combination flares and orange smoke signals
D. 6 hand red flares，and 6 hand orange smoke signals

[单项选择]Fire protection regulations for towing vessels require all crew members to know how to perform each of these tasks EXCEPT（）.
A. start the mechanical ventilation system for the engine room
B. operate the fuel shut-off for the engine room
C. operate all fire extinguishing equipment aboard the vessel on board the vessel，including starting the fire pump
D. All of the above

[单项选择]Fire protection regulations for towing vessels allow all of these types of fuel piping，EXCEPT（）.
A. steel
B. aluminum in an aluminum-hulled vessel
C. schedule 80 fire resistant plastic pipe
D. nickel-copper，copper-nickel or annealed copper