CCNA – IP Routing Questions

thakns 9tut very nice

very good :*

9tut thank you for all the questions. i really appreciate all your effort specially to those who are really focus in cisco certifications. more power. XD

9tut, I appreciate the exam type questions that you are posting on this website.
Thanks,
resolved

planning to take exam on tomorrow morning……any unexpected recent changes in ccna exam…can anyone help??

Q10. the answer was wrong for the exit interface,
C. HFD(config)# ip route 10.5.6.0 255.255.255.0 fa0/0
Ans:HFD(config)# ip route 10.5.6.0 255.255.255.0 fa0/1
cause this is the exit interface base on the exhibit.

It seems Q1 has wrong answer: OSPF chooses the best path via bandwidth. T1 is much higher than 10baseT or 100baseT, therefore the path should be R1, R2, R5. Answer B , not A!

@new
seems to be little confused about T1 & 10baseT speeds

T1>>> 1.544 Mbps
10baseT> 10 Mbps
100baseT>100Mbps

how can T1 higher than 10???

hope to be this useful to u :)

So useful Questions thnx 9tut :) :)

@new
@Eng-Support

There is a rule when it comes to OSPF chosen best path. OSPF uses bandwidth.

This is the rule “The slower the link the more bandwidth it consumes, and the faster the link the less bandwidth it consumes.

The idea of OSPF chosen best path base on the bandwidth is actually to conserve bandwidth or overhead. In order to so, OSPF chooses the faster or fastest link.(Link state)

And, by the way, between T1, 10baseT, and 100baseT.
T1 is the slowest link, followed by 10baseT, and then 100baseT.

My advise is read some more about OSPF and its characteristic. Thanks.

thanks 9tut!!!!!!!!

thanks a lot!

i will be taking exams come monday 12 can someone send me the latest dumb on ccna

please comment Q5 – its true?

please can some one explain me question 3 ???

@9tut
is option C correct for Q5? tested on packettracer and couldn’t get it to define any routes as default.

@bakki
you are asked for the simplest way. a static route is the simplest way

@9tut
so “ip default-network 0.0.0.0″ is correct?
i thought it had to be “ip default-network NETWORK_ADDRESS”

thank you for the reply :)

@ Vince

T1 is 1 mbp

Remember, the serial links are slower than ethernet links, by this, at the moment you never saw 100 mbps of internet speeds, that are being supplied by your ISP.

9tut is def building my confidence. Hopefully I’ll be ready by next month.

thanks 9tut just cleared ccna 14 dec

@ deepak singh jasrotia (sanoora) thanks for me providing a guide line

hi guys,
am new in this site and has fallen in love with. am intending to seat for ccna in a few weeks time. my problem now is that i cannot find a site to download a Qemu host for practice. i’ve tried many but to no avail. pls help and keep doing this good work.

Thx 9tut, your website is very helpful. Keep up the good work.

@bakki

just review about subnetting

/22 accomplished the condition to cover 4 networks in the 3rd octet of 172.16.X.0, where X is from 0 to 3 subnet.

@Ngoroko

there are lots of Qemu host images that you can download from gns3.net website.
there are also qemu hosts for vbox that you can use as a switch.

best paper

Hi guys. I’m just wondering,

are these two hosts on the same network? do they communicate within the LAN without a router?

PCA: 192.168.1.1/24
PCB: 192.168.1.2/25

@XYZ
Thanks for the your advice. will visit and the download asap.

when we used ospf or Eigrp if network link was failure.we can identify the link failure using keep alive meassge…but my question is when we use static route how we can identify link failure ?what should we do that?plz anyone help me……….

@ragul

Static route are manually configured and injected into routing table by network admin. Should something go wrong with the static route, the network admin would have to fix it manually.

Router#show running-config

I hope this helps.

can somebody pls explain further q3 for me ?

@usGhana

Between London and Manchester is a serial link(point-to-point)
Therefore configuring a static route(most reliable route) on London to direct all traffic destined for 172.16.0.0/22 via 10.1.1.2., which will service 172.16.1.0/24….172.16.2.0/24…..172.16.3.0/24 Manchester workstations.

I hope this helps.

@koffy
tanx alot

Q5. it should be ” ip default-network NETWORK-ADDRESS”

hi all,thanks for the information you are sharing on this site its really helpfull.I sitting for my ccna 640-802 exam next week,if anyone does have latest dumps please may you kindly assist me,you can send them to canvarlp2p@yo.co.zw

thank you

someone could explain Q3?

@dan123

Between London router and Manchester router is a serial link(point-to-point)
Therefore configuring a static route(most reliable route) on London will direct all traffic destined for 172.16.0.0/22 via 10.1.1.2., which will service 172.16.1.0/24….172.16.2.0/24…..172.16.3.0/24 Manchester workstations.

I hope this helps.

@koffy

you said “172.16.0.0/22″ why /22?

@dan123
that is the summarized network.

if you want the neighboring router to show up several subnets in one then you use summarization.

as you can see nobody is using the 172.16.0.0/24 so we can include that in a bigger summarization.

172.16.0.0 /24
172.16.0.1 /24
172.16.0.2 /24
172.16.0.3 /24

what is the range for these 4 networks? 172.16.0.0 ~ 172.16.3.255.
if you were to have a subnet with all these IP addresses what would the subnet mask be? 255.255.252.0 or /22

can anybody explain that why is the E answer??????

f IP routing is enabled, which two commands set the gateway of last resort to the default gateway? (Choose two)

A. ip default-gateway 0.0.0.0
B. ip route 172.16.2.1 0.0.0.0 0.0.0.0
C. ip default-network 0.0.0.0
D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1
E. ip route 0.0.0.0 0.0.0.0 172.16.2.1

answer C E

@suhail

If option C is the default network, then you going to need a route to that default network leading to remote network or ISP. This is called the “ip route” gateway of last resort to the default network. Option E.

Hope this explains it and also helpful.

Hi 9tut… Hi Guys! Can you please help me… I will take exam this Feb. Please send me latest dump so that I will have an idea for the exam.. rico.blake@ymail.com

Thanks Guys!

plz send me latest dumbs nikhilnneverlasting@gmail.com

Hi everyone, can anyone help me please.. I’ll be having my exam this feb 15. Please send me the latest dump of the exam if you have. Appreciate much. here is my email add: dlanz19@yahoo.com

Q5)
what is the meaning of gateway of last resort? how come the answers are c and e? can anyone please help me out in this?

@uday
that is the default network. it’s the place where packets are sent if no other entry is matched in the routing table.

9tut wrote this 2 months ago regarding that question:
“Use the ip default-network and ip route 0.0.0.0 0.0.0.0 commands to set the gateway of last resort on Cisco routers that have ip routing enabled”

@xallax
thank u for ur clear explanation xallax………………….

excelente (Y)

Q5 was there in today’s exam.

@9tut: @Xallax: In Q5. default-network should be the IP address of Next Hop.

Like
#ip route 0.0.0.0 0.0.0.0 217.124.6.1
#ip default-network 217.124.6.1
In our Question first answer will be the following.

#ip route 0.0.0.0 0.0.0.0 172.16.2.1
#ip default-network should be 172.16.2.1 instead of 0.0.0.0

Please assist..am i right??

Hi, please can you help me with the answer to Question 3?

If a static route is configured for 172.16.2.0/22, the configured range will only cover 172.16.0.0 – 172.16.3.255 but not the target range of172.16.100.0/30

So is the graphic wrong, the answer wrong or my understanding wrong?
Thanks in advance

Sorry I did not mean to send my question as anonymous!

Its okay I see where I have gone wrong. Thanks anyway.

@arpit
9tut answered this above:
“option C of Q5 is the correct answer. For more information you can read here:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094374.shtml

“Use the ip default-network and ip route 0.0.0.0 0.0.0.0 commands to set the gateway of last resort on Cisco routers that have ip routing enabled”

You should test it on GNS3, not Packet Tracer.”

Hi guys/9tut,

Can someone please explain Q7? The answer is given as C and F. C is ok. However, I don’t think F is a correct answer. F is referring to MAC address of the router’s E0 interface. I think it should be “MAC address of the router’s E1 interface” and not E0 interface. Though, this option has not been given in the answers, so I can only see one correct answer.

@Sandpiper

F is definately right. Think of who you are sending the packet to. You are not sending the packet to the outside interface of the router, you are sending it to the interface inside, that you are connected to. If I drew it like this;

HostA –> (E0) Router 1 (E1) —-> HostC

You wouldn’t say that hostA would need to go E1 – E0 to get to host C, right? It’d be E0, E1, HostC, so the frame would be addressed to the inside interface, your connection into the router.

@BS

Thanks for the clarification. I now get it!

In Q1 the paths from R1 – R3 – R4 – R5 there are not any serial cable on the scheme, therefore I think answer A is not correct, it should be answer B the correct one but if in the path through R1 to R5 via R3 and R4 were serial connection it would be the correct answer…. Any comments for my doubt??

@Alberto, OSPF uses bandwidth as a metric to decide the best path, and serial interface has a lower bandwidth i.e T1 @ 1.544 Mbps and 64 kbps so answers will be A and RIP V2 uses hop count so it will take a path as mentioned in E. Hope it clarifies..

@ 9tut
Q.10. A static route to the 10.5.6.0/24 network is to be configured on the HFD router. Which commands will accomplish this?

A. HFD (config) #ip route 10.5.6.0 0.0.0.255 fa0/0
B. HFD(config)# ip route 10.5.6.0 0.0.0.255 10.5.4.6
C. HFD(config)# ip route 10.5.6.0 255.255.255.0 fa0/0
D. HFD(config)# ip route 10.5.6.0 255.255.255.0 10.5.4.6
E. HFD(config)# ip route 10.5.4.6 0.0.0.255 10.5.6.0
F. HFD(config)# ip route 10.5.4.6 255.255.255.0 10.5.6.0

Answer: C D

But here the exit interface for HFD router is fa0/1 right…then how the ans. c is correct, i think it shld be like this..

HFD(config)#ip route 10.5.6.0 255.255.255.0 fa0/1

Am i right… ?? plz explain

exit interface i mean next hope for HFD router is fa0/1…. :) :)

@prakash..Well check the exihibit carefully, i think exit interface for the router is f 0/0, f 0/1 is inbound interface.

RFC 9tut.Q7

Answer: C F

C. the IP address of Host C
F. the MAC address of the router’s ….E0… interface

Explanation:

When the router receives this data, it replaces the source MAC address with it own …E1… interface’s MAC address and replaces the destination MAC address with Host C’s MAC address…

My 2 cents:

The key is at which point in the network is the data located: on Host A? Then destination IP address of Host C, Destination MAC address of router’s …E0… interface. If the data is at the Router, on its way to Host C, then the Source IP address is Host A and Source MAC address of router’s …E1… interface (Destination IP of Host C, Destination MAC of Host C).

My point is, read the question carefully: The data is at Host A and being sent to Host C so C & F are correct. Cheers.

Please send me latest dump s_duttabd@yahoo.com

very nice prctice ques

this is becoming easier –thanks

Here are three commands (all providing the same solution) for adding a gateway of last
resort on the gateway router to the ISP.
Gateway(config)#ip route 0.0.0.0 0.0.0.0 217.124.6.1
Gateway(config)#ip route 0.0.0.0 0.0.0.0 s0/0
Gateway(config)#ip default-network 217.124.6.0

Q7 in today’s exam. you are the best 9tut.

Plz send me latest dump on avin.karn@gmail.com because i am going to exam of cisco.

@xallax
I have a doubt regarding the following router question:

Which of the following cisco router components is used for storing a single startup configuration file?

A. RAM
B. ROM
C. Flash Memory
D. NVRAM

My answer is NVRAM but their answer is RAM. If their answer is correct please explain because I must be missing something because as far as I know startup config is saved in the NVRAM and running config is saved in the RAM.

@raj
“startup configuration file”. the answer is NVRAM. that type of memory is writable, but it doesnt clear itself on reboot.

@xallax
So the answer to that question is wrong.

@raj
you are correct. RAM holds the running-config

Hey all.

Further to Q5 and as a follow up to these comments:
————————————————————————–
9tut answered this above:
“option C of Q5 is the correct answer. For more information you can read here:
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094374.shtml

“Use the ip default-network and ip route 0.0.0.0 0.0.0.0 commands to set the gateway of last resort on Cisco routers that have ip routing enabled”

You should test it on GNS3, not Packet Tracer.”
——————————————————————-

Something about this answer smelt to me, so I tested both in packet tracer and GNS3.

The command “ip default-network 0.0.0.0″ IS INCORRECT. IT DOES NOT WORK.

This command on its own does nothing. It WILL NOT set the Gateway of last resort. The quoted Cisco paper says nothing about using a network of 0.0.0.0 with this command. This command HAS to be used to point to a know network of the router. Without the command “ip route 0.0.0.0 0.0.0.0 x.x.x.x” there is no 0.0.0.0 network, but the ‘ip route’ command is only thing needed to set the Gateway of last resort in any case, therefore issuing “ip default-network 0.0.0.0″ afterword is redundant.

Again, this is an terrible question and it should be noted as such if it ever came up in an exam.

PS. and to clarify the above

I am not denying that the command “ip default-network” is used to set the Gateway of last resort, just that the specific command “ip default-network 0.0.0.0″ will actually do that – it won’t

Arpit is almost right – the command should be “ip default-network” needs to use the 172.16.0.0 network, but the command is classfull. This actually means you will need two commands to get it to work, the first will be:

ip default-network 172.16.2.0.

At this point a static route will actually be added to your running config for the 172.16.0.0 network with the next hop to 172.16.2.0

then at the classfull boundary:
ip default-network 172.16.0.0

NOW the gateway of last resort using JUST the ip default-network command has been set.

Last point to above – I have assumed that the 172.16.2.1 is subnetted /24 (255.255.255.0)

thanks moreee 9tut

Q8 is very bad formulated. Actually there are 4 correct answers.
Both B,D,E and F are correct, you can use BGP if you like to.. but yes maybe its a bit more complicated but still you CAN use it.

If this question comes up on my next exam, i will probably rage at cisco!

very good

please can everybody send me any questions came in last exam
my e-mail altorabi_28@hotmail.com
thanks 4 all

@Going for CCIE

True, but BGP is not covered in CCNA, that is a CCNP topic. IGRP is no longer supported in the current IOS versions, so that answer is out. And RIPv1 can’t be used because it doesn’t support VLSM.

Leaving the answers to be B, D, F.

You have to remember you are looking at a CCNA dump, not higher level CCNP/CCIE.

Hello Can you please help:
Which circumtance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN
a.after links are re-established
b.in an improperley implemented redundant topology
c.when upper-layer protocols required high reliability
d.during high traffic periods
e.when dual ring topology is in use

I think is b or e ??
Thanks
CP

@CP
Ans : B .in an improperley implemented redundant topology (Pass4sure)

@ccna-baby
Thank u

Q5 today in the exam

Dear all,

you may also want to check below site for some useful resources. Good luck to all of us!

http://www.careercert.info

thanks 9tut
pls can any one tell me the link to download full free vce

Pls some1 can help me to get understand IP summerize. how its work, how to find summerize mask
thanks

Q3 was in my exam today…