Cisco考试题库:ccna最新真题

　　25: you give your it department a spreadsheet of ip addresses and their subnets. you receive a call from one of the junior techs asking what the /26 means next to the ip addresses. you tell her:

　　a. it represents the number of hosts possible on that subnetwork.

　　b. it represents the number of subnetworks that are being used.

　　c. it represents the class of ip address being used.

　　d. it represents the number of bits in the subnet mask that are 1.

26: you are given an ip network of 192.168.5.0 and told that you need to separate this network into subnetworks that can support a maximum of 16 hosts per subnet. this will help alleviate congestion on the network. what subnet mask can you use to create the subnets necessary to meet the given criteria?

31: you are troubleshooting your router's interfaces. for some reason, the ethernet interface will not accept the ip address of 192.168.5.95/27 that you've assigned. which of the following explains the router's refusal to take the ip address?

36: one of your co-workers at acme, inc., needs to convert the binary number 11010110 into a decimal. what is the decimal equivalent? 41: you are a network technician at acme, inc. you have subnetted the 192.168.72.0 network with a /30 mask for connections between your routers. your boss asks you how many usable subnetworks and usable host addresses per subnet this will provide. what should you tell her, assuming your router cannot use ip subnet-zero?



　　a. 198

　　b. 214

　　c. 252

　　d. 255
　　
　　37: one of your co-workers at acme, inc., needs to convert the binary number 10110110 into a decimal. what is the decimal equivalent?

　　a. 182

　　b. 192

　　c. 202

　　d. 212
　　
　　38: you are configuring a subnet for the acme, inc., branch office in beijing. you need to assign ip addresses to hosts in this subnet. you have been given the subnet mask of 255.255.255.224. which of these ip addresses would be valid? (choose three.)

　　a. 15.234.118.63

　　b. 92.11.178.93

　　c. 134.178.18.56

　　d. 192.168.16.87

　　e. 201.45.116.159

　　f. 217.63.12.192
　　
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Cisco考试题库:ccna最新真题