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问题 单项选择题

2，1，2/3，1/2，（）

A、3/4；

B、1/4；

C、2/5；

D、5/6；

答案

参考答案：C

解析：选C，数列可化为4/2，4/4，4/6，4/8，分母都是4，分子2，4，6，8等差，所以后项为4/10=2/5

单项选择题

Traditional IP packet forwarding analyzes the （1）IP address contained in the network layer header of each packet as the packet travels from its source to its final destination. A router analyzes the destination IP address independently at each hop in the network. Dynamic （2） protocols or static configuration builds the database needed to analyze the destination IP address (the routing table). The process of implementing traditional IP routing also is called hop-by-hop destination-based（3） routing. Although successful, and obviously widely deployed, certain restrictions, which have been realized for some time, exist for this method of packet forwarding that diminish its （4）. New techniques are therefore required to address and expand the functionality of an IP-based network infrastructure. This first chapter concentrate on identifying these restrictions and presents a new architecture, known as multipleprotocol （5）switching, that provides solutions to some of these restrictions.

（3）是（）

A.anycast

B.multicast

C.broadcast

D.unicast
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单项选择题

公安领导工作的内容不包括( )。

A．政治领导工作
B．行政领导工作
C．协调各项工作关系
D．业务领导工作
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