正确答案:

题目：微波通信系统均以“备份切换”提高系统可用度。（）

解析：√

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举一反三的答案和解析：

[单选题]相关群体中有影响力的人物称为（ ）

精神领袖

[单选题]TD-SCDMA一个载波的带宽为（）。

1.6MHz

[多选题]【Recently， telecommunication carriers has been building All-IP core networks in order to effectively support various kinds of fixed and mobile broadband services，such as up-and down-loading You tube and SNS（Social Networking Services）with rich video file，as well as broadband mobile Internet services. Such All-IP network is called NGN（Next Generation Network），which guarantees secure authentication and QoS such as the bandwidth and the delay. From the service point of view，convergence of fixed and mobile communications，known as FMC（Fixed Mobile Convergence）is becoming a key increasing new services and expanding the market.】 Form the paragraph above，we can see that（）can be defined as a network that can effectively support various kinds of fixed and mobile broadband services，with guaranteed QoS in terms of（）and etc. And the key to develop new services and gain larger market share should be（）

NGN

social network A．data rate

availability

band width， delay A．mobile communications

All-IP core network

解析：C,D,D

[单选题]下列协议中，用于配置主机IP地址或信息的是（）。

[单选题]以下关于帧中继的叙述中，不正确的是（ ）。

网络提供虚电路服务和数据报两种服务