CCNA认证考试最新真题

 

21: Your organization is using the 192.168.1.0/24 address space. You need 28 subnets. What subnet mask would you use to create these subnets?

A. 255.255.255.0

B. 255.255.255.128

C. 255.255.255.192

D. 255.255.255.224

E. 255.255.255.240

F. 255.255.255.248
 
22: Which of the following protocols maps IP addresses to MAC addresses for connectivity to occur between two hosts?

A. ARP

B. RARP

C. SLARP

D. DHCP
 
23: Your junior network administrator cannot seem to ping a host in another network and asks you why it isn't working. Which of the following is not an answer that you would give him?

A. The host's default gateway is down.

B. The destination host is not powered on.

C. The IP address of the router interface is incorrect.

D. The IP address of the switch to which the destination host connects is incorrect.

E. The host is in a different subnet.
 
24: Which of the following classes of IP addresses is utilized for multicasting?

A. Class A

B. Class B

C. Class C

D. Class D
 
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?

A. 255.0.0.0

B. 255.255.0.0

C. 255.255.255.0

D. 255.255.255.224

E. 255.255.255.240
 
27: Which of the following would a Class A network be assigned to?

A. Government agency

B. Small-to-medium sized corporation

C. SOHO

D. An individual
 
28: A client has the IP address 192.168.5.98/27. Which of the following addresses are on the same subnet as this host? (Choose two.)

A. 192.168.5.95

B. 192.168.5.100

C. 192.168.5.128

D. 192.168.5.110
 
29: Which of the following IP addresses is not a public IP address that can be routed over the Internet?

A. 2.3.4.5

B. 11.12.13.14

C. 165.23.224.2

D. 172.31.45.34

E. 203.33.45.22
 
30: You are given a Class B network. What is the default subnet mask assigned to the Class B network?

A. 255.255.255.255

B. 255.255.0.0

C. 255.224.0.0

D. 0.0.0.0
 
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?

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

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