是信息传输的物理通道（）

（）指的是利用一种网络协议传输另一种网络协议，也就是对原始网络信息进行再次封装，并在两个端点之间通过公共互联网络进行路由，从而保证网络信息传输的安全性。

涉密网络是存储、处理和传输涉及国家秘密信息的信息系统或网络

非涉密网络是存储、处理和传输非国家秘密信息的信息系统或网络

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

物理安全是指物理介质层次上对（）的网络信息的安全保护，是网络信息安全的最基本保障。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。