IEEE802.3 标准规定的以太网的物理地址长度为

CSMA/CD是IEEE802.3的核心协议，所以通常又把IEEE802.3简称为CSMA/CD标准。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

目前IEEE802.3委员会发布的千兆以太网标准有（）和（）两种。

目前IEEE802.3委员会发布的千兆以太网标准有有哪些？

下列选项中，（）属于IEEE802.3z千兆位以太网标准。