CCNA(思科网络安装支持与认证助理)考核试题库:4
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?
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
36: one of your co-workers at acme, inc., needs to convert the binary number 11010110 into a decimal. what is the decimal equivalent?
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
39: you are a network technician at acme, inc. you have subnetted the 208.98.112.0 network with a /28 mask. 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 is using ip subnet-zero?
a. 62 networks and 2 hosts
b. 6 networks and 30 hosts
c. 8 networks and 32 hosts
d. 16 networks and 16 hosts
e. 16 networks and 14 hosts
40: what is a disadvantage of using a connection-oriented protocol such as tcp?
a. packet acknowledgment might add overhead.
b. packets are not tagged with sequence numbers.
c. loss （o+r） duplication of data packets is more likely to occur. 备注[由于提交的内容中含有本系统不允许的关键词,所以分开了]
d. the application layer must assume responsibility for the correct sequencing of the data packets.
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. 62 networks and 2 hosts
b. 6 networks and 30 hosts
c. 8 networks and 32 hosts
d. 16 networks and 16 hosts
e. 14 networks and 14 hosts
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