CCNA Discovery 3 Module 4 Exam Answers Version 4.0

1 A network engineer is implementing a network design using VLSM for network 192.168.1.0/24. After subnetting the network, the engineer has decided to take one of the subnets, 192.168.1.16/28 and subnet it further to provide for point-to-point serial link addresses. What is the maximum number of subnets that can be created from the 192.168.1.16/28 subnet for serial connections? 

 1 
 2 
 4 
 6 
 8 
 16 


2 When running NAT, what is the purpose of address overloading? 

 limit the number of hosts that can connect to the WAN 
 allow multiple inside addresses to share a single global address 
 force hosts to wait for an available address 
 allow an outside host to share inside global addresses 


3 What two advantages does CIDR provide to a network? (Choose two.) 

 reduced routing table size 
 dynamic address assignment 
 automatic route redistribution 
 reduced routing update traffic 
 automatic summarization at classful boundaries 


4 How does a router keep track of which inside local address is used when NAT overload is configured? 

 The router adds an additional bit to the source IP address and maintains a separate table. 
 The router modifies the QoS field. 
 The router uses TCP or UDP port numbers. 
 The router uses a manual entry that is created and maintained in the database of the router. 


5 What is a characteristic of a classful routing protocol on the network? 

 All subnets are seen by all routers. 
 CIDR addresses are advertised. 
 A subnet can be further subnetted down and advertised correctly. 
 Updates received by a router in a different major network have the default mask applied. 


6 Refer to the exhibit. Which address is an inside global address? 

 10.1.1.1 
 10.1.1.2 
 198.18.1.55 
 64.100.0.1 


7 Refer to the exhibit. All networks that are shown have a /24 prefix. Assuming that all routes have been discovered by all routers in the network, which address will successfully summarize only the networks that are shown? 

 192.168.8.0/21 
 192.168.8.0/24 
 192.168.16.0/20 
 192.168.16.0/21 
 192.168.16.0/24 


8 What is the CIDR prefix designation that summarizes the entire reserved Class B RFC 1918 internal address range? 

 /4 
 /8 
 /12 
 /16 
 /20 


9 Which NAT term refers to the IP address of your inside host as it appears to the outside network? 

 inside global IP address 
 outside global IP address 
 inside local IP address 
 outside local IP address 


10 A network administrator is asked to design a new addressing scheme for a corporate network. Presently, there are 500 users at the head office, 200 users at sales, 425 at manufacturing, and 50 at the research site. Which statement defines the correct VLSM addressing map with minimal waste using the 172.16.0.0/16 network? 

 172.16.0.0/20 head office 
     172.16.1.0/21 manufacturing 
     172.16.1.0/22 sales 
     172.16.3.0/26 research 
 172.16.48.0/19 head office 
     172.16.16.0/20 manufacturing 
     172.16.48.128 sales 
     172.16.48.0/26 research 
 172.16.2.0/23 head office 
     172.16.4.0/23 manufacturing 
     172.16.6.0/24 sales 
     172.16.7.0/26 research 
 172.16.2.0/22 head office 
     172.16.3.0/23 manufacturing 
     172.16.4.0/26 sales 
     172.16.4.128/25 research 


11 A company using a Class B IP addressing scheme needs as many as 100 subnetworks. Assuming that variable length subnetting is not used and all subnets require at least 300 hosts, what subnet mask is appropriate to use?

 255.255.0.0 
 255.255.240.0 
 255.255.254.0 
 255.255.255.0 
 255.255.255.128 
 255.255.255.192 


12 Host A in the exhibit is assigned the IP address 10.118.197.55/20. How many more network devices can be added to this same subnetwork? 

 253 
 509 
 1021 
 2045 
 4093 


13 Refer to the exhibit. RIP version 2 is configured as the network routing protocol and all of the default parameters remain the same. Which update is sent from R2 to R3 about the 10.16.1.0/24 network connected to R1? 

 10.16.0.0/16 
 10.0.0.0/24 
 10.0.0.0/8 
 10.16.1.0/24 


14 What range of networks are summarized by the address and mask, 192.168.32.0/19? 

 192.168.0.0/24 - 192.168.32.0/24 
 192.168.0.0/24 - 192.168.31.0/24 
 192.168.32.0/24 – 192.168.64.0/24 
 192.168.32.0/24 – 192.168.63.0/24 


15 Refer to the exhibit. Based on the output of the show ip nat translations command, which kind of address translation is in effect on this router? 

 static 
 public 
 overload 
 private 


16 How many addresses will be available for dynamic NAT translation when a router is configured with the following commands? 

Router(config)#ip nat pool TAME 209.165.201.23 209.165.201.30 netmask 255.255.255.224 
Router(config)#ip nat inside source list 9 pool TAME 
 7 
 8 
 9 
 10 
 24 
 31 


17 Refer to the exhibit. Which two IP addresses could be assigned to the hosts that are shown in the exhibit? (Choose two.) 

 192.168.65.31 
 192.168.65.32 
 192.168.65.35 
 192.168.65.60 
 192.168.65.63 
 192.168.65.64 


18 What are the network and broadcast addresses for host 192.168.100.130/27? (Choose two.) 

 network 192.168.100.0 
 network 192.168.100.128 
 network 192.168.100.130 
 broadcast 192.168.100.157 
 broadcast 192.168.100.159 
 broadcast 192.168.100.255 


19 Refer to the exhibit. Which two are valid VLSM network addresses for the serial link between Router1 and Router2? (Choose two.) 

 192.168.1.4/30 
 192.168.1.8/30 
 192.168.1.90/30 
 192.168.1.101/30 
 192.168.1.190/30 


20 When configuring NAT on a Cisco router, what is the inside local IP address? 

 the IP address of an inside host as it appears to the outside network 
 the IP address of an outside host as it appears to the inside network 
 the IP address of an inside host as it appears to the inside network 
 the configured IP address assigned to a host in the outside network