ccna最新真题（1） TCP/IP Addressing and Protocol

1: Your junior network administrator wants to know what the default subnet mask is for a Class C IP address. What do you tell him?

A. 255.0.0.0

B. 255.255.0.0

C. 255.245.255.0

D. 255.255.255.0

E. 255.255.255.255
 
2: An application needs to have reliable, end-to-end connect-ivity. Which of the following protocols will give you reliable connectivity?

A. TCP

B. UDP

C. IP

D. ICMP
 
3: You are designing a network, which needs to support 55 users. You don't plan to extend the segment beyond the current number of users. Which subnet mask would best meet your needs?

A. 255.255.0.0

B. 255.255.255.0

C. 255.255.255.192

D. 255.255.255.160
 
4: You have added a new switch to your network. You want to manage it remotely, so you need to assign it an IP address. Your router that connects to the switch has an IP address of 172.16.12.33/27. Which of the following addresses can you assign to this switch?

A. 172.16.12.33/28

B. 172.16.12.32/27

C. 172.16.12.33/27

D. 172.16.12.34/27

E. 172.16.12.35/28

F. 172.16.12.38/28

G. 172.16.12.63/27
 
5: The address 172.16.208.16/20 is a host address in which of the following subnets?

A. 172.16.176.0–255.255.240.0

B. 172.16.192.0–255.255.240.0

C. 172.16.208.0–255.255.240.0

D. 172.16.224.0–255.255.240.0
 
6: You are designing an IP address scheme for your brand new remote Office. The vice president of IT calls to tell you that you will be in charge of the 192.168.1.64/26 subnetwork. This supplies you with a single subnetwork with 62 hosts. You need to have at least two subnets with 14 hosts in each subnet. What custom subnet mask should you use?

A. 255.255.255.128

B. 255.255.255.192

C. 255.255.255.224

D. 255.255.255.240

E. 255.255.255.248
 
7: You have subnetted the 210.106.14.0 network with a /24 mask. Your boss at Acme, Inc. wants to know how many usable subnetworks and usable host addresses per subnet this would provide. What should you tell her?

A. One network with 254 hosts

B. Two networks with 128 hosts

C. Four networks with 64 hosts

D. Six networks with 30 hosts
 
8: Identify three valid host addresses in any subnet of the 201.168.27.0 network, assuming a fixed subnet mask of 255.255.255.240. (Choose three.)

A. 201.168.27.33

B. 201.168.27.112

C. 201.168.27.119

D. 201.168.27.126

E. 201.168.27.175

F. 201.168.27.208
 
9: What is the subnetwork 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

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