Friday, April 29, 2016

CCNAv2 Chapter 11 Quiz Answers (100%)

Greetings, and welcome to Seeseenayy.
Below is the Chapter 11 Quiz for CCNA 2, hand-crafted by yours truly. 
I included the tutorial/explanations from the quiz page to help describe each response. Honestly, most answer pages don't ever have a tutorial section-- this is the least I could do.

On a more irrelevant note, I plan on revising my past test and exam answers, as some are blatant copies and some are just not detailed enough to help anyone if they're lost why "that answer is that correct or not".


Chapter 11 - CCNA2 QUIZ Answers
If you are looking for the exam/test answers, find it <HERE>.




Question 1
What is true regarding the differences between NAT and PAT? 
PAT uses the word "overload" at the end of the access-list statement to share a single registered address. 
Static NAT allows an unregistered address to map to multiple registered addresses. Dynamic NAT allows hosts to receive the same global address each time external access is required. 
PAT uses unique source port numbers to distinguish between translations.

Question Explanation
Refer to curriculum topic: 11.1.2



Question 2
i212260v1n2_212260.png
Refer to the exhibit. A technician is configuring R2 for static NAT to allow the client to access the web server. What is a possible reason that the client PC cannot access the web server? 
Interface S0/0/0 should be identified as the outside NAT interface. 
Interface Fa0/1 should be identified as the outside NAT interface. 
The IP NAT statement is incorrect. 
The configuration is missing a valid access control list.

Question Explanation
Refer to curriculum topic: 11.2.1 
Interface S0/0/0 should be identified as the outside NAT interface. The command to do this would be R2(config-if)# ip nat outside.



Question 3
What is correct in relation to NAT for IPv6?
It is used to convert private IPv6 addresses to public IPv6 addresses.​ 
It is a temporary mechanism to assist in the migration from IPv4 to IPv6.
NAT64 has been deprecated by IETF in favor of NAT-PT. 
Dual stack is an example of implementation of NAT for IPv6.

Question Explanation
Refer to curriculum topic: 11.2.5 
NAT for IPv6 is a temporary measure to aid in the move from IPv4 to IPv6. NAT64 is replacing NAT-PT. Dual stack is a method for running IPv4 and IPv6 on the same network.



Question 4
A network administrator wants to examine the active NAT translations on a border router. Which command would perform the task?
Router# show ip nat translations 
Router# show ip nat statistics 
Router# clear ip nat translations 
Router# debug ip nat translations

Question Explanation
Refer to curriculum topic: 11.3.1
The clear ip nat translations command clears all dynamic address translation entries from the NAT translation table. The debug ip nat command is used to verify the operation of NAT. The show ip nat statistics command displays information about the total number of active translations, NAT configuration parameters, the number of addresses in the pool, and the number that have been allocated. The show ip nat translations command displays the active NAT translations.


Question 5
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

Question Explanation
Refer to curriculum topic: 11.2.2


Question 6
A network administrator configures the border router with the command R1(config)# ip nat inside source list 4 pool corp. Which ACL is required to be configured in order for this command to function?
an access list named corp that defines the starting and ending public IP addresses 
an access list named corp that defines the private addresses that are affected by NAT 
an access list that is numbered 4 that defines the starting and ending public IP addresses
an access list that is numbered 4 that defines the private addresses that are affected by NAT

Question Explanation
Refer to curriculum topic: 11.2.2 
In order for the ip nat inside source list 4 pool corp command to work, the following procedure needs to be used: 
-- Create an access list that defines the private IP addresses affected by NAT. 
-- Establish a NAT pool of starting and ending public IP addresses using the ip nat pool command. 
-- Use the ip nat inside source list command to associate the access list with the NAT pool. 
-- Apply NAT to internal and external interfaces by using the ip nat inside and ip nat outside commands.

Question 7
i212259v1n2_212259.png
Refer to the exhibit. Router R1 is configured for PAT. What is a possible reason that the addresses in the network are not translated?
Access-list 1 is misconfigured. 
NAT-POOL2 has not been bound to the ACL. 
Interface Fa0/1 should be identified as the outside NAT interface. 
Interface S0/0/0 should be identified as the inside NAT interface.

Question Explanation
Refer to curriculum topic: 11.2.3 
The wildcard mask in the access control entry does not allow traffic from both the 192.168.11.0/24 and the 192.168.12.0/24 networks. The correct configuration command is R1(config)# access-list 1 permit 192.168.0.0 0.0.255.255.


Question 8
What are two benefits of NAT? (Choose two.) 
It saves public IP addresses.
It adds a degree of privacy and security to a network. 
It increases routing performance. It makes troubleshooting routing issues easier.
It makes tunneling with IPsec less complicated. 

Question Explanation
Refer to curriculum topic: 11.1.3



Question 9
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

Question Explanation
Refer to curriculum topic: 11.1.1


Question 10
i212256v1n3_212256.png
Refer to the exhibit. Router R1 is configured with static NAT. Addressing on the router and the web server are correctly configured, but there is no connectivity between the web server and users on the Internet. What is a possible reason for this lack of connectivity?
Interface Fa0/0 should be configured with the command ip nat outside. 
The NAT configuration on interface S0/0/1 is incorrect. 
The inside global address is incorrect. 
The router NAT configuration has an incorrect inside local address.

Question Explanation
Refer to curriculum topic: 11.2.1 
The correct syntax would be R1(config)# ip nat inside source static 192.168.11.11 209.165.200.1. (The inside local address is 192.168.11 and the inside global address is 209.165.200.1.)


Question 11
Which method is used by a PAT-enabled router to send incoming packets to the correct inside hosts?​
It uses the destination TCP or UDP port number on the incoming packet. 
It uses the source TCP or UDP port number on the incoming packet. 
It uses the source IP address on the incoming packet. 
It uses a combination of the source TCP or UDP port number and the destination IP address on the incoming packet.

Question Explanation
Refer to curriculum topic: 11.1.2 
A PAT-enabled router maintains a table that consists of a mapping of inside local IP addresses and TCP/UDP port numbers to outside local addresses and TCP/UDP port numbers. When traffic returns to the router from the public network, the router would compare the destination port to the PAT mapping table to determine to which inside host the traffic should be sent.


Question 12
What is the purpose of entering the command ip nat inside source static tcp 192.168.10.2 80 209.165.200.223 8080 at the global configuration prompt?
It identifies the inside NAT interface on the router. 
It prevents the router from establishing a connection with any device that does not have the specified address and port number.
It binds the inside local address and local port to the specified inside global address and global port. 
It enables a one to one translation between different internal port numbers.

Question Explanation
Refer to curriculum topic: 11.2.4 
The displayed command establishes static translation between an inside local address and local port and an inside global address and global port. In order to identify the inside NAT interface, the command Router(config-if)# ip nat inside would have to be entered on the respective interface.


Question 13
i248187v1n1_212261.JPG
Refer to the exhibit. Router R2 is configured with static NAT. Place in order the steps that occur when the client accesses the web server through the router. (Not all options are used.)
Step 1 - The client uses the inside global...
Step 2 - R2 receives the packet on its outside interface...
Step 3 - R2 replaces the inside global address with the inside local address of the web...
Step 4 - The web server uses the outside global address of the client as the dest...
Step 5 - R2 receives the packet from the web server. R2 checks the NAT table, then translates the source...

Question Explanation
Refer to curriculum topic: 11.2.1 
Static NAT translations are usually used when clients on the outside network (Internet) need to reach servers on the inside (internal) network. The process begins with the client trying to communicate with the web server by the use of the inside global address of the web server as the destination address. The router receives this on its outside interface, consults its NAT table, locates the destination address, and forwards the packet to the web server on the internal network via its inside local address. The web server response goes to the router, which replaces the web server inside local address with the global address (NAT table) and forwards the packet to the client on its external interface.



Question 14
A company designs its network so that the PCs in the internal network are assigned IP addresses from DHCP servers, and the packets that are sent to the Internet are translated through a NAT-enabled router. What type of NAT enables the router to populate the translation table from a pool of unique public addresses, as the PCs send packets through the router to the Internet?
static NAT
dynamic NAT
PAT
ARP

Question Explanation
Refer to curriculum topic: 11.1.2 
ARP is the address resolution protocol and is used to obtain the MAC address of the destination device. Static NAT is a one-to-one mapping between the local and global addresses of a device. PAT, otherwise known as NAT overload, maps multiple private IP addresses to a singular public address or group of addresses. Dynamic NAT uses a pool of public IP addresses and assigns them to requesting devices on a first-come, first-served basis. In the case of dynamic NAT, each device would have a unique public IP address from the pool of public IP addresses as the source IP address in the packets that they send.


Question 15
16308.jpg
Refer to the exhibit. Which address or addresses represent the inside global address?
10.1.1.2 
192.168.0.100  
209.165.20.25 
any address in the 10.1.1.0 network

Question Explanation
Refer to curriculum topic: 11.2.1

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