ICND1 – OSPF Questions
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Premium Member: You can test your knowledge with these questions first via this link.
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Note: Although OSPF topic is under ICND2 but some very basic OSPF questions are asked in the ICND1 so you should take some time to know about it. If you are not sure about OSPF, please read my OSPF tutorial first.
Question 1
[am4show have=’p2;’]Which of the following describe the process identifier that is used to run OSPF on a router? (Choose two)
A. It is locally significant.
B. It is globally significant.
C. It is needed to identify a unique instance of an OSPF database.
D It is an optional parameter required only if multiple OSPF processes are running on the router.
E. All routers in the same OSPF area must have the same process ID if they are to exchange routing information.
Answer: A C[/am4show]
Question 2
[am4show have=’p2;’]Open Shortest Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF). What is the default administrative distance of the OSPF routing protocol?
A. 90
B. 100
C. 110
D. 20
E. 130
F. 170
Answer: C[/am4show]
Question 3
[am4show have=’p2;’]Which statements describe the routing protocol OSPF? (Choose three)
A. It supports VLSM.
B. It is used to route between autonomous systems.
C. It confines network instability to one area of the network.
D. It increases routing overhead on the network.
E. It allows extensive control of routing updates.
F. It is simpler to configure than RIPv2.
Answer: A C E[/am4show]
Explanation
Answer A and C are obviously correct. For answer E, it allows extensive control of routing updates via Link-State Advertisement (LSA). Administrators can filter these LSAs to meet their requirements easily.
Question 4
[am4show have=’p2;’]R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two)
A. All of the routers need to be configured for backbone Area 1.
B. R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3.
C. A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.
D. The hello and dead interval timers are not set to the same values on R1 and R3.
E. EIGRP is also configured on these routers with a lower administrative distance.
F. R1 and R3 are configured in different areas.
Answer: D F[/am4show]
Explanation
A is not correct because the backbone area of OSPF is always Area 0.
B is not correct because R1 or R3 must be the DR or BDR -> it has to establish neighbor adjacency with the other.
C is not correct because OSPF neighbor relationship is not established based on static routing. It uses multicast address 224.0.0.5 to establish OSPF neighbor relationship.
E is not correct because configure EIGRP on these routers (with a lower administrative distance) will force these routers to run EIGRP, not OSPF.
D and F 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 5
[am4show have=’p2;’]Which address are OSPF hello packets addressed to on point-to-point networks?
A. 224.0.0.5
B. 172.16.0.1
C. 192.168.0.5
D. 223.0.0.1
E. 254.255.255.255
Answer: A[/am4show]
Question 6
[am4show have=’p2;’]RouterD# show ip interface brief
Given the output for this command, if the router ID has not been manually set, what router ID will OSPF use for this router?
A. 10.1.1.2
B. 10.154.154.1
C. 172.16.5.1
D. 192.168.5.3
Answer: C[/am4show]
Explanation
The highest IP address of all loopback interfaces will be chosen -> Loopback 0 will be chosen as the router ID.
Question 7
[am4show have=’p2;’]ROUTER# show ip route
| 192.168.12.0/24 is variably subnetted, 9 subnets, 3 masks C 192.168.12.64 /28 is directly connected, Loopback1 C 192.168.12.32 /28 is directly connected, Ethernet0 C 192.168.12.48 /28 is directly connected, Loopback0 O 192.168.12.236 /30 [110/128] via 192.168.12.233, 00:35:36, Serial0 C 192.168.12.232 /30 is directly connected, Serial0 O 192.168.12.245 /30 [110/782] via 192.168.12.233, 00:35:36, Serial0 O 192.168.12.240 /30 [110/128] via 192.168.12.233, 00:35:36, Serial0 O 192.168.12.253 /30 [110/782] via 192.168.12.233, 00:35:37, Serial0 O 192.168.12.249/30 [110/782] via 192.168.12.233, 00:35:37, Serial0 O 192.168.12.240/30 [110/128] via 192.168.12.233, 00:35:36, Serial0 |
To what does the 128 refer to in the router output above?
A. OSPF cost
B. OSPF priority
C. OSPF hop count 5
D. OSPF ID number
E. OSPF administrative distance
Answer: A[/am4show]
Explanation
OSPF uses a metric referred to as cost. The cost of the entire path is the sum of the costs of the outgoing interfaces along the path. Cisco uses a simple formula to calculate OSPF cost:
OSPF cost = 108 / Bandwidth (bit)
Therefore, a 100 Mbps FastEthernet interface will have the cost of 108 / 100,000,000 (bps) = 1
Note: Cost for interfaces with bandwidth equal or larger than 10^8 bps is normalized to 1 so a 1Gbps interface will also have OSPF cost of 1.
For “O 192.168.12.240 /30 [110/128] via 192.168.12.233, 00:35:36, Serial0″ line, the first number in the brackets is the administrative distance of the information source; the second number is the metric for the route -> In this case the second number is the OSPF cost.
Question 8
[am4show have=’p2;’]
The internetwork infrastructure of company XYZ consists of a single OSPF area as shown in the graphic. There is concern that a lack of router resources is impeding internetwork performance.
As part of examining the router resources the OSPF DRs need to be known.
All the router OSPF priorities are at the default and the router IDs are shown with each router.
Which routers are likely to have been elected as DR? (Choose two)
A. Corp-1
B. Corp-2
C. Corp-3
D. Corp4
E. Branch-1
F. Branch-2
Answer: D F[/am4show]
Explanation
There are 2 segments on the topology above which are separated by Corp-3 router. Each segment will have a DR so we have 2 DRs.
To select which router will become DR they will compare their router-IDs. The router with highest (best) router-ID will become DR. The router-ID is chosen in the order below:
+ The highest IP address assigned to a loopback (logical) interface.
+ If a loopback interface is not defined, the highest IP address of all active router’s physical interfaces will be chosen.
In this question, the IP addresses of loopback interfaces are not mentioned so we will consider IP addresses of all active router’s physical interfaces. Router Corp-4 (10.1.40.40) & Branch-2 (10.2.20.20) have highest “active” IP addresses so they will become DRs.
Question 9
[am4show have=’p2;’]What information does a router running a link-state protocol use to build and maintain its topological database? (Choose two)
A. hello packets
B. SAP messages sent by other routers
C. LSAs from other routers
D. beacons received on point-to-point links
E. routing tables received from other link-state routers
F. TTL packets from designated routers
Answer: A C[/am4show]
Question 10
[am4show have=’p2;’]What is the default administrative distance of OSPF?
A. 90
B. 100
C. 110
D. 120
Answer: C
Explanation
The Administrative Distances (AD) of popular routing protocols are listed below:
Question 11
[am4show have=’p2;’]Which characteristics are representative of a link-state routing protocol? (Choose three)
A. provides common view of entire topology
B. exchanges routing tables with neighbors
C. calculates shortest path
D. utilizes event-triggered updates
E. utilizes frequent periodic updates
Answer: A C D[/am4show]
Question 4 is incorrect i’m fairly certain. The diagram shows they they are all in the same area.
Correct Question 4 is wrong
Question 4 is correct. The answer that is causing confusion states that the routers are CONFIGURED in different areas. Technically it would have been better had they left the AREA 0 off the topology diagram, however it is just that, a diagram.
This is a popular confusing tactic for questions on Cisco certs. They grate against common sense sometimes and little keywords like “configured” make certain answers the best answer for a given question.
Please put explanation on Q:5. Thanks.
I passed Icnd1 last friday and I encountered one question concerning syntaxe command for configuration of a network in OSPF.
Answer was :
router ospf 1
network 10.0.x.x 0.0.0.255 area 0
http://www.cisco.com/en/US/docs/ios/iproute_ospf/command/reference/iro_osp2.html#wp1011948
Mike, I think the same with tha area, but so, what is the correct answer? D and?
the* oops 😛
Today on exam I had a question along the lines of “What are the advantages of ospf routers being in the same area? Choose two” it caught me off guard.
@Shayn L:
Please put explanation on Q:5. Thanks
The OSPF routers address all hello paclet with a 224.0.0.5 which is a multicast address .
Q:5–router messages are multicast in OSPF using the addresss 224.0.0.5 in point to point networks.
In multiaccess networks, DRs use 224.0.0.5 to send out LSAs to all DROthers. DROthers send messages to the DR using 224.0.0.6. This process cuts down on multiple adjacencies and network traffic in the multiaccess nvironment.
Question 5
Which address are OSPF hello packets addressed to on point-to-point networks?
A. 224.0.0.5
B. 172.16.0.1
C. 192.168.0.5
D. 223.0.0.1
E. 254.255.255.255
Answer: A
Explanation
In point to point networks the IP multicast address 224.0.0.5 is used to send Hello packets to all OSPF routers on a network segment.
In multiaccess networks the IP multicast address 224.0.0.6 is used to send OSPF routing information to designated routers on a network segment.
Trunks, it is very simple. Well, a single area ospf makes the configuration more simple. In other words, you have a more complex topology when you need to configure multiple areas. I think it is the only advantage of ospf routers in the same area.
OSPF Troubleshooting:
https://www.youtube.com/watch?v=9hQoqa-jItg
show ip ospf neighbor
show ip int brief
sho ip osfp int brief
show ip ospf
https://www.youtube.com/watch?v=9hQoqa-jItg
Anyone,
I plan on taking exam next week. What other sims/labs did you get besides the OSPF 6 router?
Thanks in Advance!
I wrote my exam on the 4th of march using this site.——-got 947 out of 1000
Q8
DR electin isn’t suppose to be made in multilink OSPF?
i know there is a switch in the diagran opening the possibility to add another router, but still only 2 routers in that segment.
can someone advise?
@Jitterbox “Question 4 is incorrect i’m fairly certain. The diagram shows they they are all in the same area.”
They’re supposed to be in the same area, but one router is configured for the wrong area.
hi all
subscribe to that channel http://www.youtube.com/user/Joynetworks for free
thanks
Got 986/1000 Marks, {5/16/2014} 50 Questions, Ospf Sim, Security simlet, and Router and switch Simlet Was also there…..All questions From 9tut. and Examcollections…..Now Heading For Icnd2 And Blogging…..
For Any Help.
Manohar Tn
Website: http://www.techlinko.com
G+ : https://plus.google.com/u/0/+ManoharTN9/
Just a small correction. In question 7, in the explanation, line speeds should be measured in bits not bytes.
@Wish me luck: Thanks for your detection. We have just updated it! Best wishes to you in your exam!
Hi everyone! I’m taking the ICND1 this Monday,I’m a bit nervous tho,any dumps would be appreciated! gfedejko@yahoo.com
Hey guys, I’m taking the ICND1 next week, can I please have the dumps for this exam it will be greatly appreciated! bigb0002@yahoo.com
Hi all, I presented the ICND1 exam on Oct 31st, 947/1000 marks. For OSPF I got this new question related with the configuration to include all interfaces, options were something like:
network 255.255.255.255 0.0.0.0 area 1
network 0.0.0.0 255.255.255.255 area 1
network 0.0.0.0 0.0.0.0 area 1
network 255.255.255.255 255.255.255.255 area 1
network 0.0.0.0 255.255.255.255 area 1 is the correct one.
https://learningnetwork.cisco.com/thread/7814
Basically is the same thing as in ACL when “permit/deny 0.0.0.0 255.255.255.255” means permit’deny any. The command “network 0.0.0.0 255.255.255 area x” enables OSPF on ALL interfaces. Should you use it? Well, as best practices and in real life no, but it depends like in a exam maybe you have a question saying enable OSPF on all interfaces using only one command.
I did the exam yesterday and 9tut.net helped me a lot. Thanks a lot for the questions and the comments. You guys are doing a fantastic job. Keep it up 🙂
I got 974/1000 on the exam. I got an OSPF sim about hello and dead interval, Network security sim with switch and router and almost everything I practiced on 9tut.net.
Question 1 were in exam on 20/11/2014, more than 45 questions were from 9tut !
I don’t understand question 8. Two segments? Why are there two segments?
Annoyingly the DR/BDR concept is not really mentioned in the ICND1 official book.
@ Anon
There are two segments because the network is separated with a serial connection (point-to-point) connection between Corp-3 and Branch-1. There’s no DR and BDR election in point-to-point links. It only occurs in a multiaccess network. Therefore, two DRs are elected (one for the 10.1.x.x segment and another one for the 10.2.x.x segment).
show ip ospf neighbors DOES NOT show the routers beyond the point-to-point connection.
Tested it on packet tracer.
Wish me luck guys. I take my ICND1 Next Monday.
Thanks guys,all this is awesome-i will be taking my ccna exam in 3 weeks, wish me luck..
I have a quick question. Either in ICND1 or ICND2, are any of these sim questions straight-up configuration simulations? Like in a practice lab where you have to configure EIGRP on 5 routers etc, or are they “get some information via show commands and choose some multiple choice answers” questions? Does that make sense? Because I have been racking my brain trying to remember each and every command, which of course is never a bad thing but I also dont want to be losing sleep trying to remember some obscure ip command.
@Anderson. DR election is made at multi-access however, it is not at point to point.
The easy way to know if it is multi or point, is by looking at the cables. If the router is connected
To another router with a serial cable, it is point to point. If it is ethernet, then is multi-access.
Took the ICND1 today, there was a new question about OSPF not on this site. Something to the effect of what is the advantage of running single area OSPF vs multiple area OSPF, 2 choices. Study OSPF and you will be good.
Hey everyone, I’m scheduled to take ICND1 on 19th this month, can someone share some dumps for this exam, thank you in advance. jmathenge14@yahoo.com
please share with me any icnd1 dump mas.lazaro@yahoo.com
Hello everyone! Great information! I take my icnd1 test the 16th of this month (March). If someone could email me the dumps at hots76@yahoo.com , I’d highly appreciate it.
I am not a big fan of question 4, answers show D, F correct – answer F “r1 and r3 are configured
in different areas” the picture just totally messes me up – it shows the diagram of all three routers in area 0.
Question 8 isn’t covered in the ICND1 book (I’ve just re-read the entire chapter). Does anyone know if this is a CCNA question posted in error?
q1, 5 in icnd1 exam
Can anyone send me ICND1 dumps.
gardnermiss@yahoo.com
I will be taking exam soon please send me dumps ilkayakgul2002@yahoo.com
i’m taking it today 🙂
I will be taking exam soon please send me dumps gmboya12@yahoo.com please !!plEASE
please send me valid dumps.
just took my icnd1 this morning, passed with a 940+, all ?s from susan/ question #6 my answer was router-id 2.2.2.2, although 172.16.5.1 was an option. fyi- understand the questions, cisco will change the numbers and wording on half of the questions….
get free dumps dumps from this link
wurl. cc/dumps
please i need more clarification on on question 8, am thinking 10.2.20.20 and 10.2.10.10 should be the answer. pls i need help on this for betterr understanding
@all: We had to move all the questions and answers out of 9tut. We can only keep the explanation. You can download the questions and answers at: https://mega.co.nz/#!oIdESYbD!yyu33vygrfKPy4rcmcbV6qW2fxINNoTokuDM3CjA_og
y the question r been removed it was such a good site and now its confusing
@9tut team,
Please add below question in ospf section.
What are two benefits of using a single OSPF area network design? (Choose two)
A. It is less CPU intensive for routers in the single area.
B. It reduces the types of LSAs that are generated.
C. It removes the need for virtual links.
D. It increases LSA response times.
E. It reduces the number of required OSPF neighbor adjacencies.
Answer: B C
I had this question in exam today, Correct answers are B & C. I scored 100% in all sections except from switching. I choose B & C . so it has to be correct.
Thanks for your wonderful efforts. Owe you a lot.
@9 tut team.
I have another ospf question as per below.
How to configure 10.1.1.0/24 network with single OSPF area ?
Answer was
Router ospf1
network 10.1.1.0 0.0.0.255 area 0
Network is correct but wording might be different and i cant remember other options but above mentioned is the correct answer.
Just keep an eye on this one . When some1 else posts full options please update question in data base.
Thanks
Thx Hemal
was ospfv2 and v3 on it?
all I see are answers, does anyone know how to get the questions, please
http://www.mediafire.com/download/686kvdms48m67k7/ICND1_2_Questions_July_2015.pdf
can any one tell me where to download packet tracer , i upgraded my windows to 10 and my already installed packet tracer is giving me all sort of error. also wish me luck guys my icnd 2 test is in 1 month and i am not doing well :s
Where and how may I get the questions?
Explanation is given but what is the question?
Any suggestion or help in this regard?
Hello 9tut operation folks:
How may I get OSPF Neighbor Sim and OSPF Sim?
Hello All, thanks for the questions link but the file is from July 2015, are these questions valid now? in March 2016?
All 9tut questions are old dated?
@waseem: Please visit this link for newest questions: https://www.9tut.net/icnd1-2-questions-and-answers
Always this question are on test ? Please let me know couse i must take the eaxam tomorrow
Hello mary, i will take the exam tomorrow and regarding your question i really hope so.
Hello friends. can some body help me to give me the valid sumps for ICND-1 I have my exam next week please.
tariqmohammad dot icc at gmail dot com
Hey, 9tut, the link you posted on March23 2016 does not currently work? Are there new questions for 2016? If so, can you reload the link please.
Is OSPF in the topics?
Is OSPF in the exam topics for ICND 100-105?
for the new ICND 1 please check the CISCO topics:
https://learningnetwork.cisco.com/community/certifications/ccent/icnd1/exam-topics
OSPF is in icnd2
is ospf in icnd1 (nope)
hi guys,
can someone send me the dumps according the answers of this site for ICND1 and other material???? please please please. I really neeeeeeeeeeeeeeeed it. heeeeelp me please . I’m sad 🙁 🙁
my email address is jane_woken52 @ yahoo.com (no spaces before and after @ sign)
🙁 🙁
Hi guys,
does anyone know about the new dumps, any help?
Why are these kind of questions if all this is part of the ICND2 exam?
Is OSPF really part of the new CCENT? Should not be only RIPv2?
According to official Cisco statement OSPF topic is a part of ICND2, not ICND1.
What are two benefits of using a single OSPF area network design? (Choose two)
A. It is less CPU intensive for routers in the single area.
B. It reduces the types of LSAs that are generated.
C. It removes the need for virtual links.
D. It increases LSA response times.
E. It reduces the number of required OSPF neighbor adjacencies.
Answer: B C
here is my research
LSA tables are:
Router LSA
Network LSA
Summary LSA
Summary ASBR LSA ( if single area, deleted)
AS external LAA ( if single area, deleted)
Not-so-stubby area LSA
External attribute LSA for BGP.
all areas in the OSPF AS must be physically connected to area 0, if not possible, then need to use Virtual Link. if all routers are in the single area (only can be in area 0), then Virtual Link is not needed.
Anyone has just taken the 100-105 ? Is ospf in the test?
Thank you.
I’ve just taken ICND1, there is no ospf in my exam.
Hi everyone,i am writing icnd 1 next week, can someone please send me the latest dumps for icnd1, wanga dot jafta15 at gmail dot com