【简答题】【消耗次数：1】
网络体系结构为什么要采用分层次的结构？
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相关题目
【单选题】
按照网络体系的分层结构分类，局域网交换机可以分为（ ）。
①
机架式交换机、带扩展槽固定配置式交换机、不带扩展槽固定配置式交换机和可堆叠交换机
②
以太网交换机、快速以太网交换机、千兆位以太网交换机、FDDI交换机和ATM交换机
③
桌面交换机、工作组级交换机、部门级交换机和企业级交换机
④
第2层交换机、第3层交换机、第4层交换机和第7层交换机
随机题目
【单选题】
—Hi, Tory, can I use your computer for a while this afternoon?—Sorry. __________.
①
Its repaired
②
It has been repaired
③
Its being repaired
④
It had been repaired
【单选题】
In that country, guests usually feel that they are not highly ______ if the invitation to a dinner party is given only three or four days before the party date.
①
regarded
②
thought
③
admired
④
concerned
【单选题】
Would you please keep silent? The weather report __________ and I want to listen.
①
is broadcast
②
is being broadcast
③
has been broadcast
④
had been broadcast