Network Addres Translation(NAT)is an Internet standard that enbles a local-area network to use one set of IP addresses for internet traffic and another set of（ ）IP addresses for external traffic.The main use of NAT is to limit the number of public IP addresses that an organization or company must use,for both economy and（ ）purposes.NAT remaps an IP address space into another by modifying network address information in the（ ）header of packets while they are in transit across a traffic routing device.It has become an essential tool in conserving global address space in the face of（ ）address exhaustion.When a packet traverses outside the local network,NAT converts the private IP address to a public IP address.If NAT runs out of public addresses，the packets will be dropped and（ ）"host unreachable"packets will be sent.
(1)A.local
B.private
c.public
D.dynamic
(2)A.political
B.fairness
c.efficiency
D.security
(3)A.MAC
B.IP
c.TCP
D.UDP
(4)A.IPv4
B.IPv6
c.MAC
D.logical
(5)A.BGP
B.IGMP
c.ICMP
D.SNMP
（ ）is the process of transforming information so it is unintelligible to anyone but the intended recipient.
As each application module is completed,it undergoes（ ）to ensure that it operates correctly and reliably.
（ ）algorithm specifies the way to arrange data in a particular order.
After analyzing the source code,（ ）generates machine instructions that will carry out the meaning of the program at a later time.
（ ）can help organizations to better understand the information contained within the data and will also help identify the data that is most important to the business and future business decisions.
浏览器开启无痕浏览模式后，（ ）依然会被保存下来。
下列协议中，不属于TCP/IP协议簇的是（ ）。
下列传输介质中，带宽最宽、抗干扰能力最强的是（ ）。
数控编程常需要用参数来描述需要加工的零件的图形。在平面坐标系内，确定一个点需要2个独立的参数，确定一个正方形需要（ ）个独立的参数。
某书的页码为1，2，3，...，共用数字900个（一个多位数页码包含多个数字），据此可以推断，该书最大的页码为（ ）。
