更多"Which statement about transmitting "的相关试题:
[单项选择]By using（）system a ship can send a distress message and know with certainty it will be received.
A. COSPAS-SARSAT
B. SATELLITE
C. terrestrial radio
D. INMARSAT
[单项选择]The signal to guide vessels in distress，which indicates，“This is the best place to land” is the（）.
A. horizontal motion of a white flag
B. letter K in Morse code given by light
C. code flag S as a hoist
D. firing of a white star signal
[单项选择]All stations which receive a distress alert shall immediately cease（）.
A. any transmission
B. any harmful transmission
C. to use radiotelephone
D. using radiotelephone
[单项选择]Which is a distress signal? （）
A. A triangular flag above or below a ball
B. The International Code Signal of distress indicated by "JV"
C. A green smoke signal
D. Flames on the vessel as from a burning tar barrel
[单项选择]Which EPIRB transmits a distress alert that is received and relayed by an INMARSAT satellite?（）
A. Class A EPIRBs
B. Class B EPIRBs
C. L-Band EPIRBs
D. Category I EPIRBs
[单项选择]Which is NOT a distress signal?（）
A. A continuous sounding with any fog signal apparatus
B. A signal sent by radiotelephone consisting of the spoken word Mayday
C. An International Code Signal of N.C
D. The firing of green star rockets or shells
[单项选择]Which statement about Fibre Channel communications is correct?（）
A. It operates much like TCP.
B. Flow control is only provided by QoS.
C. It must be implemented in an arbitrated loop.
D. Communication methods are similar to those of an Ethernet bus.
E. N_Port to N_Port connections use logical node connection points.
[单项选择]Which statement about radio navigational warnings is TRUE（）.
A. The topics for warnings included in HYDROLANTS，HYDROPACS，and NAVAREA warnings are the same
B. NAVAREA warnings concern only coastal navigation and inland navigation in large bays or sounds such as Puget Sound
C. The United States is responsible for NAVAREA warnings in the North Atlantic north of 7°N，and west of 15°W
D. Long range radio navigational warnings are usually broadcast by radiotelephone，radiotelegraph，and radio-teletypewriter
[单项选择]Which signal is recognized as a distress signal?（）.
A. Directing the beam of a searchlight at another vessel
B. A smoke signal giving off orange colored smoke
C. A whistle signal of one prolonged and three short blasts
D. International Code Signal PAN spoken over the radiotelephone
[单项选择]Which statement about CiscoWorks 2000 Inventory Manager is true?（）
A. It uses SNMP v1.
B. It scans devices for hardware information.
C. It scans and records the operational status of devices.
D. When the configuration of a device changes, the inventory is automatically updated.
[单项选择]Which statement about satellite navigation is TRUE? （）
A. While a fix can be generated by signals received from two satellites，three satellites are necessary for reliable accuracy
B. The satellites are in equatorial orbits around the earth about 60°of longitude apart
C. The satellite navigation system determines a fix by measuring the doppler shift of the radio signals from the satellite
D. The ship's receiver cannot begin processing data until the antenna locks onto the satellite and starts continuous tracking
[单项选择]Which statement about diesel engine combustion is true?（）
A. Combustion does not begin until the piston starts down on the power stroke
B. Maximum combustion pressure is reached before TDC
C. Turbulence in the cylinder causes a delay in ignition
D. Maximum cylinder firing pressure is not developed until the piston passes TDC
[单项选择]Which statement about access lists that are applied to an interface is true?（）
A. you can apply multiple access lists with the same protocol or in different direction.
B. you can config one access list,per direction,per layer 3 protocol
C. you can place as many access lists as you want on any interface
D. you can apply only one access list on any interface
[单项选择]Which statement about data center access layer design modes is correct?（）
A. The access layer is the first oversubscription point in a data center design.
B. When using a Layer 2 loop-free design, VLANs are extended into the aggregation layer.
C. When using a Layer 2 looped design, VLANs are not extended into the aggregation layer.
D. When using a Layer 3 design,stateful services requiring Layer 2 connectivity are provisioned from the aggregation layer.
E. The data center access layer provides the physical-level connections to the server resources and only operates at Layer 3.
[单项选择]Which statement about vlan operation on cisco catalyst switches is true?（）
A. when a packet is received from an 802.1Q trunk,the vlan id can be determined from the source MAC address table.
B. unkown unicast frames are retransmitted only to the ports that belong to the same vlan
C. ports between switches should be configured in access mode so that vlans can span across the ports
D. broadcast and multicast frames are retransmitted to ports that are configured on different vlan.
