【4G is one of those terms that keep coming back through marketing brochures for what the latest technologies happen to be in the

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问题【4G is one of those terms that keep coming back through marketing brochures for what the latest technologies happen to be in the cellphone market．Every carrier claims to have true 4G,and has been claiming that for years，regardless of what they actually use．The reason was simple because the real 4G specification，expected to be drafted by the International Telecommunication Union，was no where to be found．In fact，the ITU took way longer than being expected to come up with a decision，likely because of massive lobbying campaigns．After all，which company wants to have to redesign its entire network just to be able to keep saying they are 4G?Now however,the ITU has decided itself．What does this mean for carriers and users? First,let’s see what 4G really is．As expected．LTE is central to the ITU strategy,but more precisely,the organization went with LTE．Advanced．Which is a stricter version of traditional LTE．To qualify as 4G,a network has to provide 100 Mbps connections over wireless，and 1 Gbps over wired．The whole network has to be fully IPv6 compliant．Frequencies have to be scalable over 40 MHz to avoid interference．Finally, global roaming has to be seamless，along with transitions between wireless and wired connections．
This is a real step forward，and a good decision，which ensures that real 4G services will meet a good level of service．Technically,LTE—Advanced is just one of two new standards that are now under the umbrella called IMT-Advanced．The other one is WiMAX 2 which is a further refinement of the WiMAX protoco1．】
Based on the paragraph above，to qualify as 4G,a network has to satisfy(98) criteria The transitions between wireless and wired connections have to be(99)．LTE-Advanced is a standard belonging to(100)．
(99)

选项 A、1imited
B、possible
C、seamless
D、deployed

答案C

解析

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【4G is one of those terms that keep coming back through marketing brochures for what the latest technologies happen to be in the

中级通信专业综合能力

通信专业技术人员职业水平

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物业服务合同除了应当具备的八大内容外，还应包括当事人双方根据物业服务需要商定的其他条款，如()。

评标委员会完成评标后，应当向招标人提出书面评标报告，阐明评标委员会对各投标文件的评审和比较意见，并按照招标文件规定的评标标准和评标方法，推荐不超过()名有排序的合格的中标候选人。

以下()不属于物业管理的重要作用。

《城市房地产管理法》规定房地产交易包括()等3种形式。

()是指城市人民政府根据城市经济建设和社会发展情况，按照实际需要对已经批准的城市总体规划作局部变更。

业主委员会的性质是()。

在美国,全美物业管理协会所确定的基本物业管理功能主要包括()。