Cisco试题库:ccna真题(下)(7)

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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?　　a. class c addresses cannot be assigned to ethernet interfaces.

　　b. the /27 is an invalid mask.

　　c. it is a broadcast address.

　　d. it is a public ip address.

　　e. it is a private ip address.　　　　32: you are a network technician at acme, inc. you are required to divide the 172.12.0.0 network into subnets. each subnet must have the capacity of 458 ip addresses. also, according to the requirements, you must provide the maximum number of subnets. which subnet mask should you use?

　　a. 255.255.255.254

　　b. 255.255.254.0

　　c. 255.255.240.254

　　d. 255.255.0.0　　　　33: what is the subnetwork and broadcast ip address of 192.168.2.37 with the subnet mask of 255.255.255.248?G7m

　　a. 192.168.2.24/192.168.2.31

　　b. 192.168.2.32/192.168.2.39

　　c. 192.168.2.40/192.168.2.47

　　d. 192.168.2.48/192.168.2.55

　　e. 192.168.2.56/192.168.2.63　　　　34: one of your co-workers at acme, inc., needs to convert the binary number 11011010 into a decimal. what is the decimal equivalent?

　　a. 218

　　b. 219

　　c. 220

　　d. 221

　　e. 222　　　　35: one of your co-workers at acme, inc., needs to convert the binary number 01011010 into a decimal. what is the decimal equivalent?

　　a. 75

　　b. 83

　　c. 90

　　d. 97