单项选择题
If an Ethernet port on router was assigned an IP address of 172.16.112.1/20, what is the maximum number of hosts allowed on this subnet?()
	A. 1024
	B. 2046
	C. 4094
	D. 4096
	E. 8190
                    
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                                    多项选择题
                                    
 Which of the following IP addresses fall into the CIDR block of 115.54.4.0/22? ()
 A. 115.54.8.32 
 B. 115.54.7.64
 C. 115.54.6.255
 D. 115.54.3.32
 E. 115.54.5.128
 F. 115.54.12.128
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                                    单项选择题
                                    
 What is the network address for a host with the IP address 201.100.5.68/28?()
 A.201.100.5.0 
 B.201.100.5.32
 C.201.100.5.64
 D.201.100.5.65
 E.201.100.5.31
 F.201.100.5.1
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                                    多项选择题
                                    
 Which of the following IP addresses is a private IP address? Select all that apply.()
 A.12.0.0.1 
 B.168.172.19.39
 C.172.20.14.36
 D.172.33.194.30
 E.192.168.42.34
 
             
             
                
            