[ 单选题 ] (3分)By which of the following access technology, bandwidth is not shared among the users? ( )
A. WiFi
B. HFC
C. ADSL
D. None of the above
查看答案
The original reason for the Internet to use packet switching is ( ).
A. Statistical multiplexing enables efficient sharing of expensive long-haul links.
B. Packet switching enables data to be routed faster than circuit switching.
C. It is less work for a router to process a packet than to process the data in a circuit.
D. Packet switching requires simpler hardware on the routers than circuit switching.
Web服务器是一种端系统。智能手机、便携机、PC机、联网的智能电器也都是端系统。
A. 对
B. 错
OSI/RM体系结构规定网络协议划分为7层。
A. 对
B. 错
光纤到户的英文缩写是____________。
A. FTTO
B. FTTH
C. FTTS
D. FTTB
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