52-ccna-nat-sim-question.pdf

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CCNA NAT SIM Question 1

June 15th, 2011 Go to comments

Question

A network associate is configuring a router for the CCNA Training company to provide internet access. The ISP has provided the company six public IP addresses of 198.18.184.105 198.18.184.110. The company has 14 hosts that need to access the internet simultaneously. The hosts in the CCNA Training company LAN have been assigned private space addresses in the range of 192.168.100.17 – 192.168.100.30.

The task is to complete the NAT configuration using all IP addresses assigned by the ISP to provide Internet access for the hosts in the Weaver LAN. Functionality can be tested by clicking on the host provided for testing.

Configuration information router name – Weaver inside global addresses – 198.18.184.105 198.18.184.110/29 inside local addresses – 192.168.100.17 – 192.168.100.30/28 number of inside hosts – 14

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The following have already been configured on the router：

- The basic router configuration

- The appropriate interfaces have been configured for NAT inside and NAT outside

- The appropriate static routes have also been configured (since the company will be a stub network, no routing protocol will be required.)

- All passwords have been temporarily set to “cisco”

Page 1 of 11CCNA Training » CCNA NAT SIM Question 1

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Solution

Note: If you are not sure how NAT & PAT work, please read my Network Address Translation NAT Tutorial. You can download this sim to practice here: http://www.9tut.com/download/9tut.com_CCNA_NAT_sim_question.zip

The CCNA Training company has 14 hosts that need to access the internet simultaneously but we just have 6 public IP addresses from 198.18.184.105 to 198.18.184.110/29. Therefore we have to use NAT overload (or PAT)

Double click on the Weaver router to open it

Router>enable Router#configure terminal

First you should change the router’s name to Weaver

Router(config)#hostname Weaver

Create a NAT pool of global addresses to be allocated with their netmask (/29 = 255.255.255.248). There were reports that the simulator in the real exam did not accept “prefix-length” keryword so you should use “netmask” keyword.

Weaver(config)#ip nat pool mypool 198.18.184.105 198.18.184.110 netmask 255.255.255.248

Create a standard access control list that permits the addresses that are to be translated

Weaver(config)#access-list 1 permit 192.168.100.16 0.0.0.15

Establish dynamic source translation, specifying the access list that was defined in the prior step

Weaver(config)#ip nat inside source list 1 pool mypool overload



This command translates all source addresses that pass access list 1, which means a source address from 192.168.100.17 to 192.168.100.30, into an address from the pool named mypool (the pool contains addresses from 198.18.184.105 to 198.18.184.110)

Overload keyword allows to map multiple IP addresses to a single registered IP address (many-to-one) by using different ports

The question said that appropriate interfaces have been configured for NAT inside and NAT outside statements.

This is how to configure the NAT inside and NAT outside, just for your understanding:

Weaver(config)#interface fa0/0 Weaver(config-if)#ip nat inside

Weaver(config-if)#exit

Weaver(config)#interface s0/0 Weaver(config-if)#ip nat outside Weaver(config-if)#end

Finally, we should save all your work with the following command:

Weaver#copy running-config startup-config

Check your configuration by going to “Host for testing” and type:

C:\>ping 192.0.2.114

The ping should work well and you will be replied from 192.0.2.114

Other lab-sims on this site:



CCNA Frame Relay Sim

CCNA Configuration SIM Question (RIPv2 SIM)

CCNA VTP SIM

CCNA EIGRP LAB

CCNA Drag and Drop SIM

CCNA Implementation SIM



Comments Comment pages « Previous 1 … 6 7 8 23

1. Rapunzel March 26th, 2013

finally!! PASSED my CCNA! caaaaaaant believe ittt!! oh lord im so happy!! \=D/ *crazy dance*

2. Tanmay March 26th, 2013

We have to add a default route to this configuration. Please correct me if I am wrong

3. Bhumika shah March 30th, 2013

hey Rapunzel plss can u send me dumps i am giving exam in 5 days my email id is [email protected]

4. mazhar hussain April 3rd, 2013

please some one send me licenced version of visual_certexam_suite_setup .i m thank full 2 u.my mailing add: [email protected].

5. joney April 4th, 2013

i am preparing for CCNP exam anyone kindly share the pass4sure dump

[email protected]

6. Mihail April 7th, 2013

Sorry, guys. Sorry, I don’t exactly understand.

Will subnet mask (/28 and /29 in this case) be known or not?

7. Ricardo April 7th, 2013

@Mihail

The subnet masks are not known to us. You need to find the subnet mask by yourself looking at the range of the IP addresses they give us.

Public IP addresses – range 6 so its /29 = 6 host 1 Broadcast 1 Network



Private IP addresses – range 14 so its /28 = 14 hosts 1 Broadcast 1 Network

Good luck!

8. Adeel April 8th, 2013

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9. Mihail April 9th, 2013

@ Ricardo

Tnanks, Ricardo.

10. Ruth April 9th, 2013

Can anyone explain how the ISP is set up because I cannot get to ping the ISP which I tried to configure with packet tracer.

11. yves-leduc April 19th, 2013

hi! i passed my ccna like many. i hav an advers: don’t try to pass ur exam in FRENCH. my native language is french and i passed this exam in french. Cisco give me other sims: NAT QSTION 1 and 2 other. It was difficult but i passed it…. use 9tut and learn the ccna lesson and exam will be easy.

12. teemz



April 20th, 2013

you need to add an ip address and default gateway to the switch

13. Systemunicast April 20th, 2013

Guys how much points gives PRACTICE LABS. for example ACL2 or VTP? and how much points just questions?

14. colwin rebeiro April 21st, 2013

happpy to share with u my friends here….passed my ccna exam with 920 marks…..i did my whole preparation in 9tut n all of my success credits go to 9tut…friends just study here n do d exam….study dumps clearly cos order of choices r different so dont commit to memory…go with the dumps 5 to 6 times b4 go to the exam…and the simulations were access list sim 2 and eigrp…bt slight modifications.especially in access list 2…in 9tut for access list 2 there r some modifications…dont forget to prepare that friends.all the very best do well friends…..thanku very much 9tut

15. Ghorba April 21st, 2013

Passed today 933/1000 Thanks Sekhar.Dump still 100% valid laps (EIGRP,ACL2,VTP) same as 9tut

16. Burhan-u-ddin April 27th, 2013

please i need CCNP dumps if any one have ,, i’ll b grareful ,, if any one could sent it to this email add .. [email protected]

17. naif April 29th, 2013

Please help i want to give ccna exam After 10 days please sent Latest dumps on [email protected]

18. stephen April 29th, 2013

am preparing for ccna 640-802 to be taken at the end of may please could you post for dumps or sent for on [email protected]. you assistance is highly appreciated

19. stephen April 29th, 2013

dear Ruth ISPs normally assign public ip adresses which are routable across internet and your private ip addresses are not routable across internet. try to check if you have configured NAT in



your gateway router to perform the stated scenario.secondly check the encapsulation type on your serial link to the ISP may be there is mismatch. please also correct me where neccesary

20. adrk April 30th, 2013

I have my exam in 4 hours!!! wish me luck

21. Jr April 30th, 2013

Do they tell you specifically what name should you use or you use “mypool” just because?

22. munirul.islam May 6th, 2013

Can You give running Link

23. nyaan May 12th, 2013

do we need to configure loopback on the router?

24. Abhishek May 14th, 2013

hey u all plss can u send me dumps i am giving exam in 5 days my email id is [email protected]

25. Lolo May 16th, 2013

Hello,can you sent me examen ccna in french or lien?Please please

26. Anonymous May 16th, 2013

can someone pls send me, a stimulation i need it urgently my mail is [email protected]

27. saleemkhan May 21st, 2013

Assalam o Alaikum,Hello all my dear friends,If anybody wish to get the Boson Simulator Latest version 8.05 for CCNA/CCNP to please email me at [email protected] Without any cast of single penny really,Just humanity… Best of luck! Thanks

28. saleemkhan May 21st, 2013



dear,nyaan loopback on router just due to ping n knew that router intact through serial port.loopback is ever up so its helpful to knew that your serial link working well.if no ping other link than you should check that there is problem yet loopback ping successfully.. thanks

29. m May 27th, 2013

I configured this sim and i was able to ping from ISP to host but while pinging from host to ISP it showed request timed out…. Could anyone please help me out..?

30. Pradreskey May 27th, 2013

I am preparing for ccna 640-802 to be taken at the end of JUNE. Please could you post for dumps or send it to me at [email protected]. Your assistance is highly appreciated. Thank you in anticipation.

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52-ccna-nat-sim-question.pdf