【单选题】
GPRS行业终端数据配置中，终端需要访问的客户服务器IP地址，一般由（ ）配置，如192.168.x.x。___
A. 我司
B. 客户
C. 集成商
D. 维护人员
E.
F.
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答案
B
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以太网交换机是一种（ ）___
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H.248协议中以下哪个命令既可以由MG发给MGC，也可以由MGC发给MG（ ）___
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【单选题】
H.248协议中以下哪个是MG发给MGC的心跳消息？（ ）___
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