题目内容

以下那一条命令用于配置默认路由项。

A. router(config-router)
B. default-information originate
C. router(config)
D. ip route 0.0.0.0 255.255.255.255 GigabitEthernet0/1
E. router(config-router)
F. default-information originate always
G. router(config)
H. ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/1

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The （1） system is, in fact, its own network. To the（2） and application process this translation is a （3） provided either by the local （4） or from a remote host via the （5）. If one DNS server (or resolver) doesn't know how to （6） a particular domain name, it asks another one, and so on, until the correct （7） address is returned.The DNS was originally introduced in the United States of America and the final （8） of an address was intended to indicate the （9） of organization hosting the computer. Some of the three later final （10） (edu, gov, mil) are still only used by organizations based in the USA. Others can be used anywhere in the world.

电连接的过度线夹材质为?

A. 铜铝
B. 铜
C. 氧化锌
D. 铁

汇流排电连接线及线夹所用型号、材质、数量、应符合要求，并预留因温度变化使接触悬挂产生伸缩而需要的长度。

A. 对
B. 错

汇流排电连接线夹处，需采用铜铝过渡端子或铜铝过渡垫片，以消除铜电连接线与铝合金电连接线夹之间的电腐蚀。

A. 对
B. 错