CCNA – OSPF Questions
Here you will find answers to OSPF Questions
Note: If you are not sure about OSPF, please read my OSPF tutorial
Question 1
Which of the following statements below best describe the process identifier that is used to run OSPF on a router? (Choose two)
A – It is an optional parameter required only if multiple OSPF processes are running on the router
B – It is locally significant
C – It is needed to identify a unique instance of an OSPF database
D – All routers in the same OSPF area must have the same process ID if they are to exchange routing information
Answer: B C
Question 2:
Why R1 can’t establish an OSPF neighbor relationship with R3 according to the following graphic? (Choose two)
A – Configure EIGRP on these routers with a lower administrative distance
B – All routers should be configured for backbone Area 1
C – R1 and R3 have been configured in different areas
D – The hello and dead interval timers are not configured the same values on R1 and R3
Answer: C D
Explanation:
A is not correct because configure EIGRP on these routers (with a lower administrative distance) will force these routers to run EIGRP, not OSPF.
B is not correct because the backbone area of OSPF is always Area 0.
C and D are correct because these entries must match on neighboring routers:
- Hello and dead intervals
– Area ID (Area 0 in this case)
– Authentication password
– Stub area flag
Question 3:
Which items are correct about the routing protocol OSPF? (Choose three)
A – Support VLSM
B – Increase routing overhead on the network
C – Confine network instability to one area of the network
D – Allow extensive control of routing updates
Answer: A C D
Explanation:
Routing overhead is the amount of information needed to describe the changes in a dynamic network topology. All routers in an OSPF area have identical copies of the topology database and the topology database of one area is hidden from the rest of the areas to reduce routing overhead because fewer routing updates are sent and smaller routing trees are computed and maintained (allow extensive control of routing updates and confine network instability to one area of the network).
Question 4:
Which three features are of OSPF routing protocol? (Choose three)
A – Converge quickly
B – OSPF is a classful routing protocol
C – Identify the best route by use of cost
D – Before exchanging routing information, OSPF routers find out neighbors
Answer: A C D
Question 5:
OSPF routing uses the concept of areas. What are the characteristics of OSPF areas? (Chose three)
A – Each OSPF area requires a loopback interface to be configured
B – Areas may be assigned any number from 0 to 65535
C – Area 0 is called the backbone area
D – Hierarchical OSPF networks do not require multiple areas
E – Multiple OSPF areas must connect to area 0
F – Single area OSPF networks must be configured in area 1
Answer: B C E
Explanation:
I used to think the answers should be C D E and here is my explanation:
OSPF can use an active interface for its router ID, so a loopback interface is not a must -> A is incorrect.
OSPF Area is a 32-bit number so we can use up to 232 – 1 = 4294967296 – 1 (since Area 0 is the first area). Remember that only process ID is a 16-bit number and ranges from 1 to 65535 -> B is incorrect.
F is incorrect too because single area OSPF netwoks must be configured in Area 0, which is called the backbone area.
For answer D, it is a bit hard to guess what they want to say about “hierarchical” but we should understand “Hierarchical OSPF networks” as “OSPF networks”. D is correct bercause we can only have one area (area 0 – the backbone area) for our networks.
But TT commented on 01-11-2010:
Especially to note on choice B, D, and E:
Choice B: we all know that The areas can be any number from 0 to 4.2 billion and 1 to 65,535 for the Process ID. As choice B specifies ‘area’ (be aware, it’s not saying ‘process id), there is no reason to say that we cannot assign numbers from 0 to 65535 for area # (it is using ‘may be’, not ‘have to be’ or ‘ought to be’). Hence, we do not worry about assigning ’0′.
Choice E: as Area 0 is the backbone, we all understand that any areas in a OSPF network have to be connected to it. And actually this is implicitly saying that multiple areas form a hierarchical OSPF network, as Area 0 being a root and others being its leaves.
Choice D: when it specifies ‘Hierarchical’, at least 2 areas should be required to form such topology (of course that includes Area 0)
Although Choice B is not an absolutely accurate statement since it not only can be assigned up to 65535, it is still a correct answer. And again, it specifies ‘area’, not ‘process id’, so ’0′ can be included. Finally, it would be meaningless to call OSPF a hierarchical network if no more than one area is present.
—————————————————————————————————-
I reviewed the question and think it is a more suitable solution with choice B than choice D, surely it is a tricky question!
Question 6:
Part of the OSPF network is shown below:
Configuration exhibit:
R1 routing commands:
ip route 0.0.0.0 0.0.0.0 serial0/0
router ospf 1
network 172.16.100.0 0.0.0.3 area 0
network 172.16.100.64 0.0.0.63 area 0
network 172.16.100.128 0.0.0.31 area 0
default-information originate
You work as a network technician, study the exhibits carefully. Assume that all router interfaces are operational and correctly configured. In addition, assume that OSPF has been correctly configured on router R2. How will the default route configured on R1 affect the operation of R2?
A – Any packet destined for a network that is not directly connected to router R2 will be dropped immediately
B – Any packet destined for a network that is not directly connected to router R1 will be dropped
C – Any packet destined for a network that is not directly connected to router R2 will be dropped immediately because of the lack of a gateway on R1
D – The network directly connected to a router R2 will not be able to communicate with the 172.16.100.0, 172.16.100.28 and 172.16.100.64 subnetworks.
E – Any packet destined for a network that is not referenced in the routing table of router R2 will be directed to R1. R1 will then send that packet back to R2 and a routing loop will occur
Answer: E
Explanation:
First, notice that the more-specific routes will always be favored over less-specific routes regardless of the administrative distance set for a protocol. In this case, because we use OSPF for three networks (172.16.100.0 0.0.0.3, 172.16.100.64 0.0.0.63, 172.16.100.128 0.0.0.31) so the packets destined for these networks will not be affected by the default route.
The default route configured on R1 “ip route 0.0.0.0 0.0.0.0 serial0/0″ will send any packet whose destination network is not referenced in the routing table of router R1 to R2, it doesn’t drop anything so answers A, B and C are not correct. D is not correct too because these routes are declared in R1 and the question says that “OSPF has been correctly configured on router R2″, so network directly connected to router R2 can communicate with those three subnetworks.
As said above, the default route configured on R1 will send any packet destined for a network that is not referenced in its routing table to R2; R2 in turn sends it to R1 because it is the only way and a routing loop will occur.
Hi Guys
I’M taking my CCNA exam on sept 2011, please help with latest dumps
this is my email Address : alejandratnr@gmail.com
many many thanks!
Great site guys. luv the organization of topics and explanations
Taking 640-802 soon. B grateful if some 1 could shoot me latest dump @: niabingi.cronicles@gmail.com
Hi guys
Pls i will be taking my CCNA exams in sept 2011, pls i need the current dumps pls
this my email address : regi4moore@yahoo.com
pls i will be very great if my request will be granted.
we do not know the routing table for R2. maybe it dowsnt have a default route to R1 configured on it so it might drop some packets forwared by R1 and hence no routing loop
hi guys am taking my ccna exam on next month i need current dumps plz send me abhishathu@gmail.com
iam taking ccna exams in september any body with current dumps please help.:e-mail address harrisonkarizamimbak@yahoo.co.uk
Please email latest CCNA dumps to martmichel@hotmail.com
Taking the test soon, gracias!!
pass today 954
ACL2 and eigrp and vtp sim
I use permit any any and got 100%
Manu… congrats to you!!!!!
with you exam out of the way.. I’m sure that you can vouch for this also.. this site is probably one of the best practice tests out there.. I see so many different ?’s on this site that WERE on my CCNA exam. I truly believe that if one has read (watched the CBT nuggets as a close second to the actual reading material) the CCNA books then this site alone should pop your score into the 900′s. I am just scared you guys are trying too hard to get every ? memorized.. If you know the theory behind the topics this site is really all you need before you test.
many many hats off to 9TUT…. note.. i also used this site (and yes I look through the icnd1 and 2 sites (9TUT.net ) just to check out the ?’s there.
please dont take offense to my thoughts. I believe in working hard so my playing harder. Its such a awesome feeling passing a test like this with a 964… again.. thanks to you “9″.
i want take ccna exam by next week….. can help latest 9tut updates
pls my gud people am writing ccna exams i need the latest update on 9tut or dumps pls
my email :regi4moore@yahoo.com
Thanks David
In my score sheet it is written I can not take any cisco exam for next 180 days. What does that mean and I want to study Active directory. I need help like where to get documentation or videos and is there any site like that for Microsoft.
Hi Manu, is the CCNA Dump Changed..as one of my friend has got OSPF SIM & He failed. please help as i am writing CCNA on saturday.
Hi Manu, is the CCNA Dump Changed..as one of my friend has got OSPF SIM & He failed. please help as i am writing CCNA on saturday.
hi,
i have my CCNA tomorrow. Could someone give me latest tips? thanks!
Hello guys, I am taking my CCNA exam soon, can you guys give me the latest dump on my email please? wattiyu@gmail.com thank you very much
I used Train Signal for my Microsoft Certs.. the videos are average 45 mins to an hour as opposed to the CBT nuggets for Cisco… TS videos are very detailed and organized.. let me know if this helps you any.
Im not sure about the 180 day wait before another Cisco sit down.. let me know what you find out about that.
my apologizes… the previous log was for Manu from David..
oops….
Hi Guys,
I’M taking my CCNA exam next week, Can anyone please help me out with latest dumps…
My email Address is: anujprasad688@gmail.com
Hi Guys,
I’M taking my CCNA exam next week, Can anyone please help me out with latest dumps…
My email Address is: anujprasad688@gmail.com
Hi 9tut,
Please give me the answer of these questions below..
1) why does ospf use wildcard mask in network statement ?
2) what is the difference between wildcard mask and subnet mask?
Wildcard masks are much more flexible than subnet masks. This is a short and sweet answer for both questions Flocc…..
with a WCM we can get sooo much more granular than with a SNM.
hope this helps you out.
HELP….LATEST DUMPS …topshady5@yahoo.com
pls pls pls send latest dumps to bdubz9180@gmail.com
thank you thank you… taking my test next week!
failed the test, then found this site, its great info. Need to retake test next week trying to get a position that will be available soon.
Please send latest dumps to adomar832@yahoo.com.
Greatly appreciated also great job 9tut!!!!!
Guys..m giving the exam next week….m very afraid i may fail it…can anyone help me and tell me on which topics the maximum questions are and give me dumps…..or shd i only give CCENT…icnd 1?? my email is uthathi@gmail.com
Helllo guys
There are like 10 questions that are not from the dumps.
ACL sim I use permit Ip any any and I got 100 %
Hi Guys
I’M taking my CCNA exam on Aug 2011, please help with latest dumps
this is my email Address : shijohsu@gmail.com
many many thanks!
Hi Guys,
I’M gona take my CCNA exam in coming Sep 2011. Would u please help with latest dumps?
my email Address : amen4all@gmail.com
thxs!
hi guys am taking my ccna exam this
month i need current dumps plz send me amarjeet118@hotmail.com
hi am taking ma exam in two weeks could anyone pls send me the latest dumps??
my id is lux.prabha15@gmail.com
Thanks for all the help! Taking the test again next week. Please end me the latest dumps to burdy53@gmail.com. Thanks everyone!
Can you guys please send me the latest dumps? bwgrandison@yahoo.com Thanks in advance
latest dumps please mahapatra.puja@gmail.com
i need latest dumps my exam is on 10th of AUG can any one send me latest dumps
hammad_atta@hotmail.com
hammadatta@yahoo.com
thanx
I would very much appreciated it if someone can share the latest dump. I am planing to take the CCNA exam soon. Please mailto: barca4eever@yahoo.com
Anyone with d latest ccna dump sud pls send to, ashmota2000@yahoo.com
Hi Guys
I’M taking my CCNA exam on 13th august 2011, please help with latest dumps
this is my email Address : durai.m.rajj@gmail.com
advanced thanks!
Can you guys please send me the latest dumps? hassan_abualrob@ymail.com Thanks in advance
Hi guys,
I will be taking my CCNA exam in few days so any advice is welcome.. plz if anyone has latest or old dumps plzz forward it to my email…
thnks alot in advance…
I will be taking CCNA exam in next 2 weeks, can anyone mail me the latest dumps pls..
Thanks in advance
Can you please send me the latest dumps on appu1687@gmail.com
CCNA in a couple of days…Thanks!!
Hi Guys, i have a CCNA exam brochure that I am willing to sell at less than the regular cost , please contact me at manica2210@gmail.com
Hi i want to learn CCNA, Can u help me telling answers while i am Doing the exams……
@donnnn
that means you don’t want to learn, you want to cheat…
Hi Guys, cost of ccna exam is $250 , i am selling an exam brochure for only $200, this is great for someone who wants to save some money, I got this brochure from CISCO itself, so it is genuine and it is valid till May 2012, I have done CCNA myself but I did it in two parts, I would not use this brochure anyways. My email is manica2210@gmail.com
Hey there can you guys help me on this, i want to know how often do these dumps change for e.g if iam appearing for the exam next month..when should i ask for the latest dumps. Kindly please help me on this, as i really need to pass this exam. and can you please mail me the latest dumps.. on hashrazakhan@gmail.com.
Thanks.
hi my exam in the next month any one have an updated dumps please send it on A7mad1987@yahoo.com
thanx alot
dump plz
Please sent me the Dumps to apinus3@gmail.com
Hi all
can any one send me the latest dumps my exam this month
fikky_superabdo@yahoo.com
Hi all
can any one send me the latest dumps my exam this month
zamani31976@gmail.com
R2 will get the default route from R1. but R2 is connected to R1 on s0/1 and NOT S0/0 and hence traffic will be dropped by R2 and no routing loop
In regards Q6. The main reason for network looping is that, network or packet of last resort(default-route) is configured on the ISP router interface S0/1 instead of R2 S0/0 interface. This kind of arrangement is bound to create a loopped network. eg. R2 int s0/0 ip default-route 0.0.0.0.0.0.0.0 ISP int s0/1 ip route 0.0.0.0.0.0.0.0 200.0.0.2
This is my opinion. any suggetions please?????
Can someone tell me how I can download the sim questions to practice with b4 my exam.
@emeks
for sims it’s better to read the explanation given very well, may write it down using pencil and paper. you can also try to recreate the situation in packettracer, this way you get familiar with the commands and the setup and the solution.
pls can some 1 help me with the latest dumps i will soon b writing my ccna
this is my email
edehdaniel22@yahoo.com
Latest dumps would be greatly appreciated! Taking the test this week
krum_1981@yahoo.com
Please, latest dump would be greatly appreciated…….I would be taking exams on the 6 Sept., next week. Thanks.
petnart115@yahoo.ca
About Q.6..
in few dumps answer is B C E…..
what is right….?
please..
Thanks
Sorry its Q..5
Hi all, i saw that the Exam questions was changed 30% can somebody tell me about the Exam or that the exam was changed? or can tell me list of the Simulations or how many simulation are in the exam?? Plz help me i am highly appreciated you all.
CCNA Exam asked me:
Why 2 routers can not form a adjacency?:
A) the dead timers intervale are diferents in both routers.
B) ID process are diferents in both routers.
I think is the B answer, because A alternative is a incomplete answer….
Help Please!!!
ID process has nothing to do with forming adjacency.
the answer was A
I am taking my exams next week. Can someone please email the latest dump to me at charlie.1900@hotmail.com, Thanks
is CCNA is easy please help me with ssome ps
hi …. friends i am also talking exam of ccna on dec 28 please sent mt latest dumps om my email-id omsai.ndc@gmail.com
ccna is a serious skill guys.
Hi, Appreciate if someone could send me the latest dumps at treepanel.ken@hotmail.com , i plan to take the exams at the end of sep.
Thanks.
Hi all, can anybody pls send me the latest dumps @ rami603@hotmail.com. I’m taking my CCNA next week…will let u know wt Ques were there…
Thx in advance…
EXCELLENT SITE; with great people questioning and answering I am very happy to see such a dedication provided by 9tut. Love to have latest CCNA questions, will be highly appreciated. ccnp14@gmail.com
meanwhile thanks and keep it-up!
hi, Going to take the ccna exam this week. please can anyone send me the latest dumps @ alienisuru@yahoo.com …… thanks
xallax
can dead timers in ospf be configured?
@stantheman
sure it can, but that’s not a problem for us at the CCNA leve
read here:
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/fasthelo.html
Please i want the latest dumps. My email lilu8400@gmail.com
Here are the dumps:
D => Discover Your Knowledge First
U => Unite Your Thoughts
M => Manage, Mix and Match
P => Provide Prohibited Questions
S => Start, Energize and Progress
hi i am taking my ccna xam next week,cud anybdy say if the dunps changed and the latest sims givn in the recent exams???????
@ anyone can u send me the latest CCNA actual exam?
please send it to sab3001@hotmail.com
Appreciate anyone who will share it. Thanks!
@Claudio from Chile:
Why 2 routers can not form a adjacency?:
A) the dead timers intervale are diferents in both routers.
B) ID process are diferents in both routers.
The reason B is not the answer is because in OSPF the process ID is locally significant. You can have different process IDs throughout the routers what you can’t have is different areas ie:
R1: ip add 192.168.0.0 0.0.255.255 area 0
R2: ip add 10.10.0.0 0.0.255.255 area 1
Those two routers will not exchange topologies without you setting up a border router.
Just an FYI:
In EIGRP the AS (Autonomus System) does have to match for routers to share their topolgies.
hey guys i heard tat dumbs has been changed is it true????
yes . that’s true
Hey i am giving the exam on 21st of sep.
What kind of questions are changed??
Pls tell me..I dont have enough days,….
Are the sims changed??
Q6.
General question about “Default Route”, also referred to as gateway of last resort. This routes handles packets which does not reference any route in the routing table. Mostly used for internet based traffic.
My question is how should the default route be configured to avoid loop, on question 6?
Anyone share some light on this? Thanks.
@koffy
correct configuration:
ip route 0.0.0.0 0.0.0.0 serial0/1
the default route should be towards the ISP router
Thanks xallax. That’s what I thought initially.
default-information originate : this command will make the default gateway of R2 as R1
anyone please send me the latest dumps to ponyango19@yahoo.com..thanx
Taking the exam soon, on 29 sept! Anyone please send me the latest dumps to pappyratoon@gmail.com..thanx
Taking exam in sept.any one with latest dumps.emeka062004@yahoo.co.uk
Taking the exam in sept,Anyone with latest dumpd.
emeka062004@yahoo.co.uk
default-information originate: Can some of you explain a bit more in depth PLEASE!!!!
OK, I can’t follow question 2. It asks Why R1 can’t establish a neighbor relationship with R3 but doesn’t give you the configuration. How would you answer that without seeing the configuration. What am I missing?
OK, the light just went on! I figured it out. It’s actually asking what are 2 possible reasons that R1 can’t estabish a neighbor relationship with r3. Got it!
hi i would just like to know if you don’t save youre config in your sim do you lose all your points there ?
I am going to sit 640-802
Hi Guys
I’M taking my CCNA exam on oct 3, 2011, please help with latest dumps
this is my email Address : risdiholic@yahoo.co.id
many many thanks!
hi guys am taking my exam nov please help me latest dumps
my email kanini.jeniffer@yahoo.com
thanks in advance
Hey guys taking my CCNA in the beginning of Oct. Could you send me the latest dumps. Thx!
baskett.milton@gmail.com
btw: 9tut.. pretty good information on here it has helped me a lot to better understand how the questions will be asked.
@paul
yes for sure.
@BMW
“default-information originate” in OSPF means “To generate a default external route into an OSPF routing domain”.