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试比较模拟通信与数字通信。

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土地革命战争时期，全日制的托儿所大多收托（）的子女。

A. 红军家属
B. 劳动群众
C. 农民
D. 工人

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当路由器接收的IP报文的MTU大于该路由器的最大MTU时，采取的策略是（）

A. 丢掉该分组
B. 向源路由器发出请求，减小其分组大小
C. 直接转发该分组
D. 将该分组分片

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百分之80的空难事故发生在起飞后三分钟和落地前八分钟，被称为（）。

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The vPC peer-gateway capability allows a vPC switch to act as the active gateway for packets that are addressed to the router MAC address of the vPC peer. This feature enables local forwarding of such packets without the need to cross the vPC peer link. Which statements are true about the vPC peer-gateway？（）

A. The vPC peer-gateway feature is enabled by default.
B. The vPC peer-gateway feature can be configured globally under the vPC domain submode.
C. Enabling the peer-gateway feature automatically disables IP redirects on all interface VLANs mapped over a vPC VLAN to avoid generation of IP redirect messages for packets switched through the peer gateway router.
D. The vPC peer-gateway feature only works with HSRP protocol.

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