Discovery 2 Chapter 4 Quiz

1. Which three addresses are valid subnetwork addresses when 172.25.15.0/24 is further subnetted by borrowing an additional four bits? (Choose three.)  
A. 172.25.15.0 
B. 172.25.15.8
C. 172.25.15.16 
D. 172.25.15.40
E. 172.25.15.96 
F. 172.25.15.248

2. What are three advantages of NAT? (Choose three.) 
A. conserves registered public IP addresses 
B. reduces CPU usage on customer routers
C. creates multiple public IP addresses
D. hides private LAN addressing from the Internet 
E. permits LAN expansion without additional public IP addresses 
F. improves the performance of border routers

3. What is the default subnet mask for the address 172.31.18.222?  
A. 255.0.0.0
B. 255.255.0.0 
C. 255.255.255.0
D. 255.255.255.254
E. 255.255.255.255

4. What are the high order binary numbers that begin a Class C address? 
A. 000
B. 001
C. 010
D. 110 

5. Host A is configured with IP address 192.168.75.34 and Host B is configured with IP address 192.168.75.50. Each are using the same subnet mask of 255.255.255.240 but are not able to ping each other. What networking device is needed for these two hosts to communicate? 
A. switch
B. hub
C. server
D. router 

6. What two pieces of information can be derived from the IP address 192.168.42.135/24? (Choose two.) 
A. This is a Class C address because the high order bits are 110. 
B. The default subnet mask is 255.255.255.0. 
C. The host portion is represented by the third and fourth octets.
D. The second high-order bit is a 0 so this is a Class B address.
E. This host address belongs to the parent 192.168.0.0 network.
F. This is one host address out of a possible 65,534 addresses.

7. What subnet mask is indicated by the network address 172.16.4.8/18?  
A. 255.255.0.0
B. 255.255.192.0 
C. 255.255.240.0
D. 255.255.248.0
E. 255.255.255.0

8. Match the IP address on the top to the appropriate description on the bottom
A. 127.0.0.0
B. 223.14.6.95
C. 191.82.0.0
D. 255.255.0.0
E. 124.255.255.255
F. 224.100.35.76
G. 61.0.0.255

1. Class C host address
2. loopback testing address
3. Class B network address
4. multicast address
5. Class A host address
6. Class B subnet mask
7. Class A broadcast address

9. The web server S2 needs to be accessible from the Internet.  Which NAT option will provide a method for outside hosts to access S2? 
A. dynamic NAT using a NAT pool
B. static NAT 
C. port address translation
D. dynamic NAT with overload

10. When a network administrator applies the subnet mask 255.255.255.248 to a Class B address, for any given subnet, how many IP addresses are available to be assigned to devices?
A. 6 
B. 30
C. 126
D. 254
E. 510
F. 1022

11. An ISP customer has obtained a Class C network address.  The network technician needs to create five usable subnets, with each subnet capable of containing at least 20 host addresses.  What is the appropriate subnet mask to use?  
A. 255.255.255.0
B. 255.255.255.192
C. 255.255.255.224 
D. 255.255.255.240

12. Match the characteristic on the top to the correct IP version (version 4 or 6)
A. uses a 32-bit 
B. is usually expressed in dotted decimal notation
C. contains a 24-bit global prefix
D. is usually expressed in hexadecimal notation
E. is in widespread use on the Internet
F. uses a 128-bit address


13. What concept is used to reduce router table complexity by aggregating multiple network addresses? 
A. supernetting 
B. subnetting
C. NAT
D. classless addressing