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The difference between international and national Navtex Ser

题目
单选题
The difference between international and national Navtex Service is limited to（）.
A

frequency allocated

B

both language and frequency

C

language used

D

transmission power and time

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第1题：

Forces within a vessel have caused a difference between the starboard and port drafts. This difference is called ______.

A.list

B.heel

C.trim

D.Flotation


正确答案：A
船舶内部的力致使船舶左右舷的吃水不同。这种不同叫做横倾。List,系指船内力所致的倾斜

第2题：

what is the difference between the HSRP and VRRP？


正确答案: （1）VRRP is an IEEE standard （RFC 2338） for router redundancy； HSRP is a Cisco proprietary protocol.
（2）VRRP allows actual router IP address to be the same with the virtual IP，and if the same the router which get the IP will become Master router of the VRRP group；HSRP do not allow actual router IP address to be the same with the virtual IP.
（3）HSRP uses the multicast address 224.0.0.2 which represent all router in the subnet ， while VRRP uses the multicast address 224.0.0.18；HSRP uses UDP port 1985 while VRRP uses a protocol number of 112.
（4）HSRP may have one active router，one standby router，multiple listening router.While VRRP may have one master router，multiple backup router.
（5）HSRP exchange three kinds of message， hello message，coup message ，resign message. VRRP exchange only one kind of message， advertisement message.
（6）In VRRP，preempt is enable by default.But in HSRP preemt is disable by default.

第3题：

The height of tide is the ______.

A.depth of water at a specific time due to tidal effect

B.difference between the depth of the water and the area's tidal datum

C.difference between the depth of the water and the high water tidal level

D.difference between the depth of the water at high tide and the depth of the water at low tide


正确答案：B

第4题：

What is difference between OSPF neighbor and adjacencies？


正确答案: Neighbor：
A neighbor is another OSPF router that is attached to the local router’s directly connected links， and ospf hello packet sended by the router have consistance parameter （such as hello time，dead time，area ID， mask and so on） with each other.
Adjacency：
An OSPF adjacency is a conceptual link to a neighbor over which LSAs can be sent.

第5题：

International trade is the exchange of goods and（）across national borders.

  • A、materials
  • B、factors of production
  • C、products
  • D、services

正确答案:D

第6题：

Magnetic compass deviation______．

A.varies depending upon the bearing used

B.is the angular difference between magnetic north and compass north

C.is published on the compass rose on most nautical charts

D.is the angular difference between geographic and magnetic meridians


正确答案：B
磁罗经自差是磁北与罗北之间的差角。

第7题：

What does the command show | compare rollback 1 display?（）

  • A、the difference between the current candidate configuration and the candidate configuration from one commit ago
  • B、the difference etween the current active configuration and the active configuration from the one commit ago
  • C、the difference between the current active configuration and the active configuration from one commit ago
  • D、the difference between the current candidate configuration and the archived configuration from one commit ago

正确答案:D

第8题：

The maximum difference between mean time and apparent time is ______.

A.equal to the longitude expressed in time units

B.about 16 minutes

C.the difference between the GHA of mean sun and the first point of Aries

D.15°of arc


正确答案：B

第9题：

There is no difference between the environmental logistics and （）one .

  • A、white
  • B、red
  • C、blue
  • D、green

正确答案:D

第10题：

What does the command show | compare rollback 1 display?（）

  • A、the difference between the current candidate configuration and the candidate configuration from one commit ago
  • B、the difference between the current active configuration and the current candidate configuration
  • C、the difference between the current active configuration and the active configuration from one commit ago
  • D、the difference between the current candidate configuration and the archived configuration from one commit ago

正确答案:D

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