单项选择题

IGRP是Cisco公司设计的路由协议，它发布路由更新信息的周期是（）

A．25s
B．30s
C．50s
D．90s

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单项选择题

We offer a broad spectrum of virtualization（）that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

A．solutions
B．networks
C．interfaces
D．connections

单项选择题

（）is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible.

A．content
B．position
C．power
D．capacity

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