ICND2 – 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: If you are not sure about OSPF, please read my OSPF tutorial first.
Question 1
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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
Assuming that all router interfaces are operational and correctly configured, 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 R1 will be dropped.
B. 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.
C. Any packet destined for a network that is not directly connected to router R2 will be dropped immediately.
D. 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.
Answer: B[/am4show]
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.
Question 2
[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]
Explanation
Link-state protocol uses hello packets to discover neighbors and establish adjacencies. After that, the routers begin sending out LSAs to every neighbor (each received LSA is copied and forwarded to every neighbor except the one that sent the LSA)
Question 3
[am4show have=’p2;’]Which two statements describe the process identifier that is used in the command to configure OSPF on a router? (Choose two)
Router(config)# router ospf 1
A. All OSPF routers in an area must have the same process ID.
B. Only one process number can be used on the same router.
C. Different process identifiers can be used to run multiple OSPF processes
D. The process number can be any number from 1 to 65,535.
E. Hello packets are sent to each neighbor to determine the processor identifier.
Answer: C D[/am4show]
Question 4
[am4show have=’p2;’]What is the default administrative distance of OSPF?
A. 90
B. 100
C. 110
D. 120
Answer: C[/am4show]
Explanation
The Administrative Distances (AD) of popular routing protocols are listed below:
Question 5
[am4show have=’p2;’]Refer to the exhibit. The network is converged. After link-state advertisements are received from Router_A, what information will Router_E contain in its routing table for the subnets 208.149.23.64 and 208.149.23.96?
A. 208.149.23.64[110/13] via 190.173.23.10, 00:00:00:07, FastEthernet0/0
208.149.23.96[110/13] via 190.173.23.10, 00:00:00:16, FastEthernet0/0
B. 208.149.23.64[110/1] via 190.173.23.10, 00:00:00:07, Serial1/0
208.149.23.96[110/3] via 190.173.23.10, 00:00:00:16, FastEthernet0/0
C. 208.149.23.64[110/13] via 190.173.23.10, 00:00:00:07, Serial1/0
208.149.23.96[110/13] via 190.173.23.10, 00:00:00:16, Serial1/0
208.149.23.96[110/13] via 190.173.23.10, 00:00:00:16, FastEthernet0/0
D. 208.149.23.64[110/13] via 190.173.23.10, 00:00:00:07, Serial1/0
208.149.23.96[110/13] via 190.173.23.10, 00:00:00:16, Serial1/0
Answer: A[/am4show]
Explanation
Router_E learns two subnets subnets 208.149.23.64 and 208.149.23.96 via Router_A through FastEthernet interface. The interface cost is calculated with the formula 108 / Bandwidth. For FastEthernet it is 108 / 100 Mbps = 108 / 100,000,000 = 1. Therefore the cost is 12 (learned from Router_A) + 1 = 13 for both subnets -> B is not correct.
The cost through T1 link is much higher than through T3 link (T1 cost = 108 / 1.544 Mbps = 64; T3 cost = 108 / 45 Mbps = 2) so surely OSPF will choose the path through T3 link -> Router_E will choose the path from Router_A through FastEthernet0/0, not Serial1/0 -> C & D are not correct.
In fact, we can quickly eliminate answers B, C and D because they contain at least one subnet learned from Serial1/0 -> they are surely incorrect.
Question 6
[am4show have=’p2;’]What are three characteristics of the OSPF routing protocol? (Choose three)
A. It converges quickly.
B. OSPF is a classful routing protocol.
C. It uses cost to determine the best route.
D. It uses the DUAL algorithm to determine the best route.
E. OSPF routers send the complete routing table to all directly attached routers.
F. OSPF routers discover neighbors before exchanging routing information.
Answer: A C F[/am4show]
Explanation
OSPF is a link-state routing protocol so it converges more quickly than distance-vector protocol. OSPF uses cost to determine the best route. The popular formula to calculate OSPF cost is: cost = 108 / Bandwidth [ in kbps] (in fact the formal formula is: cost = reference bandwidth / configured bandwidth of interface in kbps. On Cisco routers, the reference bandwidth defaults to 100000 kbps)
Question 7
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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 8
[am4show have=’p2;’]Which parameter or parameters are used to calculate OSPF cost in Cisco routers?
A. Bandwidth, Delay and MTU
B. Bandwidth
C. Bandwidth and MTU
D. Bandwidth, MTU, Reliability, Delay and Load
Answer: B[/am4show]
Explanation
The well-known formula to calculate OSPF cost is
Cost = 108 / Bandwidth
so B is the correct answer.
Question 9
[am4show have=’p2;’]Refer to the exhibit:
Assume that all of the router interfaces are operational and configured correctly. How will router R2 be affected by the configuration of R1 that is shown in the exhibit?
A. Router R2 will not form a neighbor relationship with R1.
B. Router R2 will obtain a full routing table, including a default route, from R1.
C. R2 will obtain OSPF updates from R1, but will not obtain a default route from R1.
D. R2 will not have a route for the directly connected serial network, but all other directly connected networks will be present, as well as the two networks connected to R1.
Answer: B[/am4show]
Explanation
The default-information originate command advertises a default route to other routers, telling something like “please send me your unknown traffic”. So in this case, besides a full routing table, R2 will also receive a default route from R1 -> B is correct.
Note: But in this question, the static route should be “ip route 0.0.0.0 0.0.0.0 serial0/1″ (not serial0/0), that may cause a routing loop.
Question 10
[am4show have=’p2;’]Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two)
A. Router(config)# router ospf 0
B. Router(config)# router ospf 1
C. Router(config)# router ospf area 0
D. Router(config-router)# network 192.168.16.0 0.0.0.255 0
E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0
F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 0
Answer: B E[/am4show]
Explanation
In the router ospf command, the ranges from 1 to 65535 so o is an invalid number -> B is correct but A is not correct.
ATTN 9tut:
Shouldn’t the answer to #9 be A and NOT B?
Explanation: “ip route 0.0.0.0 0.0.0.0 serial0/0” is causing a loop. configuration is going to cause
a loop and the link between R1 and R2 will be congested, OSPF will not perform relationship
between them. From its name, OSPF is a Link-State routing protocol, and the link state between
R1 and R2 is simply down or something like that.
@Joel: A routing loop in this case does not create a congestion because the looping packets are not multiplied. R1 and R2 can still establish neighbor relationship.
OSPF does NOT send routing updates until a neighbor relationship is built. So R1 and R2 do establish a neighbor relationship! Once they establish a neighbor relationship R2 will get Routing updates from R1, including R1’s default route.
B is the Correct Answer! ! !
question 9 is A, took test w/ 1000
Question #1
R1 is configured with the following default route: “ip route 0.0.0.0 0.0.0.0 serial0/0”. It is also configured with the command: “default-information originate”
Surely, then, this means that R2’s default route will also be “ip route 0.0.0.0 0.0.0.0 serial0/0”, however the router doesn’t have a s0/0 interface. This means that answer B (Any packet destined for a network that is not referenced in the routing table of router R2 will be directed to R1) is incorrect.
Am I missing something?
@Zeke OSPF is smarter than that. If you have a default route pointing towards an interface, when OSPF sends the information over to the other router (due to “default information originate” command), it updates the interface information accordingly, to correctly points towards the originating router.
If you do ‘show ip route’ on R1, you’ll see the following entry:
S* 0.0.0.0/0 is directly connected, Serial0/0
When you go to R2, (after running all the commands mentioned in the exhibit), and do ‘show ip route’, you’ll see the following entry:
O*E2 0.0.0.0/0 [110/1] via 172.16.100.1, 00:06:17, Serial0/1
You notice how R2 changed the interface information? Now, to further prove that B is the right answer, if you go to one of the clients in the subnets connected to R2, (let’s say 172.16.16.0/20) and traceroute for an unknown IP destination, you’ll see the routing loop in action:
client#traceroute 100.1.1.1
Type escape sequence to abort.
Tracing the route to 100.1.1.1
1 172.16.16.1 56 msec * 32 msec
2 172.16.100.1 40 msec 84 msec 44 msec
3 172.16.100.2 52 msec 64 msec 44 msec
4 172.16.100.1 80 msec 60 msec 84 msec
5 172.16.100.2 80 msec 60 msec 100 msec
6 172.16.100.1 108 msec 100 msec 120 msec
7 172.16.100.2 108 msec
… and it goes on till ctrl+shift+6
You notice how the packet bounced back to R2 after it was sent to R1 and then ended up in a loop?
Hope the logic is clear now.
thanks mali
Hm, “boblo” write that he took the exam with 1000pt and he chose Answer A.
So A should be correct, right?
I just created the problem as is in the question
This is what the R2 shows when running the show ip route command
O*E2 0.0.0.0/0 [110/1] via 172.16.100.1, 00:15:26, Serial0/0/0 <<—it didnt change to s0/0/1
but still built an adjacency with router 1 and after coding a default route back pointing to r1 i was able to ping to and from ISP.
The only reason why cisco may find this to be answer A is because the rules of using the ip route command says that we should use the outgoing interface when coding an ip route command like 0.0.0. 0.0.0.0 s0/0/1 unlike ip route 0.0.0.0 0.0.0.0 200.0.0.2 which is the outgoing interface? Any ideas?
Q7
D. Corp4
should read…
D. Corp-4
Please explain Q-1.
I built a packet tracer simulation for question 9. R1 and R2 DO build adjacency and there is a learnt route on R2 from the default route. So I believe answer B is correct.
I’m a bit confused about question 9. In every VCE practice test i take is correct answer A, but i simulate the scenario and my result is that correct answer should be the B. Also common sense telling everyone that B is correct, there is nothing there what can stop them in becoming a neighbours in full state.
Q9. There is no mention of OSPF being configured on R2 even thought the interfaces are operational and configured correctly. The graphic is confusing as it suggests that R2 belongs to area 0 but it can’t until configured to do so. In that respect, answer A can be the only option. If you look at Q1 its very similar in format and it references the fact that R2 has OSPF configured unlike Q9.
Q9. The right answer is definitely B. Tried it in GNS3
Adjacency forms like a charm. The only problem is that if you try a traceroute 8.8.8.8 it will loop until TTL expiration…
So which is the correct answer to Q9 ??? A or B ??
To all of the people claiming that they simulated question 9 in GNS, did you configure OSPF? The question doesn’t say that OSPF is configured on R2. If OSPF is not configured you can’t expect R1 to form a relationship with R2. The question should be rewritten but based on what you are given you have to assume it isn’t because you are not told that it is.
Question 10, E is wrong,
you don’t use wild card subnet masks in routing, you only use them in ACLs
F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 0 is correct
sorry ignore my post, my bad
Thoughts on Q9: Best option is A
A: it doesnt specify that OSPF is configured on R2 so not forming a relationship is possible
B: I thought link state protocols didnt exchange entire routing tables, ruling out this option.
C: Even if it did state R2 had OSPF configured, it would receive the default route from R1 because of the default-information originate command
D: There will be a route for a directly connected network.
@NotBobloBut,
“Assume that all of the router interfaces are operational and configured correctly. How will router R2 be affected by the configuration of R1 that is shown in the exhibit?”
A)If both routers configured correctly so they are neighbors.In addition to,the topology shows that both of them on area 0.
B)”Router R2 will obtain a full routing table, including a default route, from R1.”-because of they are neighbors they will fully exchange its database.So,full routing table which is known by R1,will be obtained by R2.
C)Because of this “default-information originate” command,R2 will obtain default route in routing table.
D)For directly connected routes always there is route(if int in up/up state and configured with IP address).
So,the answers is B.
@Konan… Everyone keeps saying “I simulated it and it worked so B must be right”. It will form a relationship, but the way it happens is why “B” is wrong.
In question 9, OSPF is a Link-State Routing Protocol. !!!LSRP’s do NOT send a full routing table with any other devices on it’s LAN!!!
Instead Router1 first sends Database Descriptions (DBD’s) to let the neighbor, Router 2, have a summary of information in it’s Link-State Database (LSDB). Then if necessary, because Router2 doesn’t have the info, a Link-State Request is sent back to Router1 saying “give me your info”. Router1 then sends a Link State Update to the requesting router consisting of it’s full LSDB.
Router 2 uses the information from these Link state Advertisments (LSA’s), runs the SPF algorithim, and figures out it’s own routing table.
http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13685-13.html
Also, in regards to your reasoning for answer (A) being wrong:
The question says “assume that all of the router ‘INTERFACES’ are operational and configured correctly. That’s it, it points out just the configuration of the interfaces. Not routing protocols!!
… “I hope this has been informative for you, and I’d like to thank you for viewing”…
Confused about Q 6
Q 9. answer B seems to me wrong
“B. Router R2 will obtain a full routing table, including a default route, from R1”
Because I think link state never exchange entire routing table .its unique and it calculated after receiving LSDB
From LSDB, a router learns the entire topology!
if I think something wrong please tell me
sooo….. Q9… for the test. A or B?
Question 9 is A
can someone email me the latest ICND2 dumps please: ahaghighi@aol.co.uk
About Question 9:
The default route creating a loop isn’t a problem for the OSPF adjacency.
I Think that is a typing error in the defaut route interface (they wanted to type Serial0/1, that justify all the possible answers)
So, i think that they want to figure a corrected default route not the default route that was creating the loop.
Finally, What is the real answer? So i think that the corrected answer is B. Anyone can justify the answer?
Or anyone that did it in the real exam…?
Thanks… i ll take my exam in 2 days…
There are two versions of this same question, with different answers.
In the first version the answer is that the config causes a loop between the two routers.
In this version, the answer is B, R2 obviously gets the full routing table, because it then goes on to create loops, justifying the answer to the other possible variant.
re Q9, i’ve done a load of old (mock) ICND2 exam questions, and on everyone of those, the correct answer is the equivalent to answer A – it will *not* form a neighbor relationship with R1, because of the routing loop caused by the default route pointing to the wrong serial interface
I haven’t taken the ICND 2 yet – will be taking it next week. Will let you know if this is on there, and if so which is correct.
Took ICND2 earlier today, 986 / 1000.
Questions 1,7, 8 and 9 from this page were on there.
Thanks mike
on the ccna exam is the right answer to Q9 A?
Q9:
Answer is B.
The question states to refer to the exhibit. Which shows R2 is in Area 0 along with R1.
In addition it states that all interfaces are operational and configured correctly. To me this indicates that R2 is configured correctly in the area and participating in OSPF area 0.
If they wanted us to troubleshoot R2 configurations then I am sure they would include it.
The routing loop has nothing to do with forming adjacency so I don’t see how answer A is correct. A routing loop will occur as shown in Q1.
Correct me if I am wrong, and please explain why, if so.
Q9 is one of those special Cisco questions… but reading the above comments it appears that answer A is indeed CORRECT…..
obtaining a “Full routing table” is not how OSPF (LSRPs) works.. Answer C points out that OSPF updates (LSUs) can be received, which Answer B does NOT point out. If only answer C stated it will also receive a default route this would be trivial..
I am taking the test in a couple days so I will go for answer A if I get this question..
I had Q9 on my exam last week. The correct answer is “A” though it may be worded differently. Think on mine it had something like “packets will go to R1 which will send them back to R2 and a routing loop will occur”. Something like that. Here, A is correct.
Q9 I have chosen “A” and passed on 1000, so no doubts how cisco interpret this puzzle 🙂
Q9
I guess the question MUST BE formulated in another way on the actual Cisco exam. Let’s say R1 is configured with OSPF and with the wrong static route, and after that you configure R2. Please look at the configuration i made with GNS3 (replace R5 by R2).
Check out the debug messages when you scroll down. You will notice when i do a no shut on the serial interface , even with the wrong static route on R1, R2 froms full neighbor relationships with R1.
R5(config-router)#network 172.16.100.0 0.0.0.3 area 0
R5(config-router)#
*Mar 1 00:08:29.031: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Serial2/0 from LOADING to FULL, Loading Done
R5(config-router)#
R5#sh ip route
Codes: C – connected, S – static, R – RIP, M – mobile, B – BGP
D – EIGRP, EX – EIGRP external, O – OSPF, IA – OSPF inter area
N1 – OSPF NSSA external type 1, N2 – OSPF NSSA external type 2
E1 – OSPF external type 1, E2 – OSPF external type 2
i – IS-IS, su – IS-IS summary, L1 – IS-IS level-1, L2 – IS-IS level-2
ia – IS-IS inter area, * – candidate default, U – per-user static route
o – ODR, P – periodic downloaded static route
Gateway of last resort is 172.16.100.1 to network 0.0.0.0
172.16.0.0/16 is variably subnetted, 6 subnets, 3 masks
O 172.16.100.129/32 [110/65] via 172.16.100.1, 00:00:05, Serial2/0
O 172.16.100.65/32 [110/65] via 172.16.100.1, 00:00:05, Serial2/0
C 172.16.32.0/20 is directly connected, Loopback2
C 172.16.16.0/20 is directly connected, Loopback1
C 172.16.0.0/20 is directly connected, Loopback0
C 172.16.100.0/30 is directly connected, Serial2/0
O*E2 0.0.0.0/0 [110/1] via 172.16.100.1, 00:00:05, Serial2/0
R5(config-if)#
*Mar 1 00:23:51.659: OSPF: Interface Serial2/0 going Up
*Mar 1 00:23:51.659: OSPF: Send hello to 224.0.0.5 area 0 on Serial2/0 from 172.16.100.2
*Mar 1 00:23:52.159: OSPF: Build router LSA for area 0, router ID 2.2.2.2, seq 0x80000006
R5(config-if)#
*Mar 1 00:23:52.651: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
R5(config-if)#
*Mar 1 00:23:59.075: OSPF: Rcv hello from 1.1.1.1 area 0 from Serial2/0 172.16.100.1
*Mar 1 00:23:59.075: OSPF: Send immediate hello to nbr 1.1.1.1, src address 172.16.100.1, on Serial2/0
*Mar 1 00:23:59.079: OSPF: Send hello to 224.0.0.5 area 0 on Serial2/0 from 172.16.100.2
*Mar 1 00:23:59.079: OSPF: End of hello processing
*Mar 1 00:23:59.131: OSPF: Rcv hello from 1.1.1.1 area 0 from Serial2/0 172.16.100.1
*Mar 1 00:23:59.131: OSPF: 2 Way Communication to 1.1.1.1 on Serial2/0, state 2WAY
*Mar 1 00:23:59.135: OSPF: Send DBD to 1.1.1.1 on Serial2/0 seq 0x15A7 opt 0x52 flag 0x7 len 32
*Mar 1 00:23:59.135: OSPF: End of hello processing
*Mar 1 00:23:59.135: OSPF: Rcv DBD from 1.1.1.1 on Serial2/0 seq 0x23F5 opt 0x52 flag 0x7 len 32 mtu 1500 state EXSTART
*Mar 1 00:23:59.135: OSPF: NBR Negotiation Done. We are the SLAVE
*Mar 1 00:23:59.139: OSPF: Send DBD to 1.1.1.1 on Serial2/0 seq 0x23F5 opt 0x52 flag 0x2 len 92
*Mar 1 00:23:59.179: OSPF: Rcv DBD from 1.1.1.1 on Serial2/0 seq 0x23F6 opt 0x52 flag 0x3 len 72 mtu 1500 state EXCHANGE
*Mar 1 00:23:59.179: OSPF: Send DBD to 1.1.1.1 on Serial2/0 seq 0x23F6 opt 0x52 flag 0x0 len 32
*Mar 1 00:23:59.199: OSPF: Rcv DBD from 1.1.1.1 on Serial2/0 seq 0x23F7 opt 0x52 flag 0x1 len 32 mtu 1500 state EXCHANGE
*Mar 1 00:23:59.199: OSPF: Exchange Done with 1.1.1.1 on Serial2/0
*Mar 1 00:23:59.203: OSPF: Send LS REQ to 1.1.1.1 length 12 LSA count 1
*Mar 1 00:23:59.203: OSPF: Send DBD to 1.1.1.1 on Serial2/0 seq 0x23F7 opt 0x52 flag 0x0 len 32
*Mar 1 00:23:59.203: OSPF: Rcv LS REQ from 1.1.1.1 on Serial2/0 length 48 LSA count 2
*Mar 1 00:23:59.207: OSPF: Send UPD to 172.16.100.1 on Serial2/0 length 112 LSA count 2
*Mar 1 00:23:59.219: OSPF: Rcv LS UPD from 1.1.1.1 on Serial2/0 length 76 LSA count 1
*Mar 1 00:23:59.219: OSPF: Synchronized with 1.1.1.1 on Serial2/0, state FULL
*Mar 1 00:23:59.219: %OSPF-5-ADJCHG: Process 1, Nbr 1.1.1.1 on Serial2/0 from LOADING to FULL, Loading Done
*Mar 1 00:23:59.227: OSPF: Rcv LS UPD from 1.1.1.1 on Serial2/0 length 64 LSA count 1
*Mar 1 00:23:59.523: OSPF: Rcv LS UPD from 1.1.1.1 on Serial2/0 length 100 LSA count 1
*Mar 1 00:23:59.723: OSPF: Build router LSA for area 0, router ID 2.2.2.2, seq 0x80000007
*Mar 1 00:24:01.659: OSPF: Send hello to 224.0.0.5 area 0 on Serial2/0 from 172.16.100.2
and here is an example of a debug ip packet detail when you do a traceroute for a unkown destination from R2:
R5#traceroute 10.10.10.1
Type escape sequence to abort.
Tracing the route to 10.10.10.1
1 172.16.100.1 28 msec 40 msec 28 msec
2 172.16.100.2 40 msec 40 msec 44 msec
3
*Mar 1 00:41:55.867: IP: tableid=0, s=172.16.100.2 (local), d=10.10.10.1 (Serial2/0), routed via FIB
*Mar 1 00:41:55.867: IP: s=172.16.100.2 (local), d=10.10.10.1 (Serial2/0), len 28, sending
*Mar 1 00:41:55.867: UDP src=49261, dst=33434
*Mar 1 00:41:55.891: IP: tableid=0, s=172.16.100.1 (Serial2/0), d=172.16.100.2 (Serial2/0), routed via RIB
*Mar 1 00:41:55.891: IP: s=172.16.100.1 (Serial2/0), d=172.16.100.2 (Serial2/0), len 56, rcvd 3
*Mar 1 00:41:55.895: ICMP type=11, code=0
*Mar 1 00:41:55.895: IP: tableid=0, s=172.16.100.2 (local), d=10.10.10.1 (Serial2/0), routed via FIB
*Mar 1 00:41:55.895: IP: s=172.16.100.2 (local), d=10.10.10.1 (Serial2/0), len 28, sending
*Mar 1 00:41:55.899: UDP src=49262, dst=33435
*Mar 1 00:41:55.935: IP: tableid=0, s=172.16.100.1 (Serial2/0), d=172.16.100.2 (Serial2/0), routed via RIB
and so on………………..
so when we look at the answers at Q9 , the only logical answer would be answer A.
with OSPF there are no full routing tables being exchanged.
If we assume no routing protocol is running on R2, answer A is the only answer to go for.
In regards to question 9. I took the test today and made a 1000/1000. This question was on the test. I selected A. The only reason I selected A is because the other answers didn’t make any sense. This should settle this debate. A is the answer. I can confirm that A is the answer because, as I said, I just took the test about 2 hours ago and I made a perfect score. Thanks 9tut!
In regards to question 9. I took the test today and made a 1000/1000. This question was on the test. I selected A. The only reason I selected A is because the other answers didn’t make any sense. This should settle this debate. A is the answer. I can confirm that A is the answer because, as I said, I just took the test about 2 hours ago and I made a perfect score. Thanks 9tut!
1 to 8 were there
However first 4 questions come as a sim lab but exam same configuration came for me
Passed today my ICND@2 by 1000. Got different configuration of the Eigrp & frame Relay labs where there were different DLCIs and IP addresses, but same process was used to get answers (show commands, show ip protocols, show ip interface brief ).
A question about GLBP and a question about netflow were on my test. You can find them here: http://www.examtut.com/2013/09/new-questions-in-ccna-200-120-hsrp-vrrp.html
Study 9tut and this guy i found him really helpful. He has unique way of teaching http://www.danscourses.com If you can do all his videos again and again. Trust me you will get the concept. Also one thing i learned today is if you don’t know the concept it’ll be hard for you in the exam.
All the best to every one in their path. Keep me in your good wishes.
Q10 changed a bit
how to add all interfaces in OSPF area 0, and options to note were
a.
b.
c. network 0.0.0.0 0.0.0.0 area 0
d. network all-interfaces area 0
In regards to question 9, I haven’t seen anyone else notice that R1 and R2 are supposed to be in OSPF area 0. When you look at the R1 configuration though, it lists “router ospf 1”. Based on that observation this answer should be “A”. So R2 won’t receive any information from R1 due to being in a different OSPF area. Also it appears that there are multiple versions of this question, the same graphic but a different question and answers to choose from.
Taking ICND2 tomorrow…
Whoops, looks like I have been studying too much…I redact my observation on the OSPF area, they are all correctly configured as Area 0…It should still be “A” though since it will have the routing loop as it is configured.
Took the exam today. Pass 986/1000. Q1, Q7 were on there.
Thanks 9tut.
Q7, why is it not Branch-1 and Branch-2. 10.2.10.10 > 10.1.40.40, correct?
I took the icnd1 and 2 within the last two weeks and used a combination of 9tut, CBT nuggets, and packet tracer as study materials.I passed both exams with a 986. There was one question regarding ospf that I had on the icnd2 that was not on 9tut.
The question was: which of the following are improvements from OSPFv2 to OSPFv3?
All the correct answers to the question can be found at the link below.
https://supportforums.cisco.com/document/97766/comparing-ospfv3-ospfv2-routing-protocol
Question 9?
NADA VCE has the same exact question with a different answer.
Answer: router R2 will not form a neighbor relationship with R1.
It explains that “router ospf 1 is configured and the diagram shows area 0.
I believe that the 9 tut answer is correct because ospf 1 is just the process ID. This has no affect on the ospf adjacency and only an effect on the local router instance?
Can someone please clarify my though process is accurate? thanks in advance for whomever responds.
Question 9 is definitely A: router R2 will not form a neighbor relationship with R1.
I passed recently with 1000/1000 and gave this as my answer.
I was worried about getting this question going in but I saw that other people said they got 1000 with A as their answer and I can confirm it’s the correct answer
question 9 correct answer A (got 1000 today)
Just passed ICND2 today. Question 9 is A. OSPF never sends a full routing table. It oy sends database description (DBD) packets when the neighbours first form!
Tested today, 8/20. #1, 6, 8, 9, 10 were on there.
took the exam today and pass with 907. Question 1, 2, 6, 7 and 9 were on there, the others weren’t.
location United States Florida.
test ICND 2
Thanks 9tut
QUESTION 9.
Question 9 : ”Assume that all of the router interfaces are operational and configured correctly. How will router R2 be affected by the configuration of R1 that is shown in the exhibit?”
The assumption here is for Router 1 and NOT Router 2. And even if it was for both routers, they are still not saying anything about the routing protocol which is configured on R2. They are talking about interfaces ( Ip address , submasks, bandwidth all configurations related to interfaces).
Let’s compare question 9 to question 1.
Question 1 ”Assuming that all router interfaces are operational and correctly configured, that OSPF has been correctly configured on router R2, how will the default route configured on R1 affect the operation of R2?”
In the question 1, It’s clearly mentioned which routing protocol is running on Router 2.
So I think the answer to question 9 should be A.
I got question 9 in my exam today
I read the question over & over in the exam as I saw the different answers given here
it matches WORD FOR WORD!!
I answered A
I got 1000 today, so A is correct
Agree with JC. Same score.
Question 9 is very confusing , I made the exact network with Packet tracer and it works without any problem and R2 received everything including the BAD default route from R1. Maybe just in the case that a lot of users in the same time start to ask for 200.0.0.2 it breaks the adjacency between R1 and R2 cause of loop which is in between.
Maybe we must trust boblo because he passed the exam with 1000
therefore the answer is A
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.
Guy, the exams (both) do not have any configuration labs on them, use your show commands to find the answers to the questions.
Question 5 (Enough about q9..theres nothing to suggest neigbours wont form)
—————
If the cost to a given subnet is supposed to be the sum of outgoing interfaces of routers to that subnet then how come routers C and D going to subnets 208.149.23.64/27 and 208.149.23.96/27 have no interface types labelled in the diagram? surely their costs should be added too?
Example from Router A to 208.149.23.96/27 of Router D:-
A:s1/0 cost=2 —-> B:e0/0 cost =10 total so far 12 ok…that agrees with A’s routing table but shouldn’t router D’s outgoing interface be added?
@Bamboozled: The cost “12” is the cumulative cost from router A to router D (Or C) so Router D and C are already considered in the cost calculation. I don’t know how you calculated that last line in your comment. Hope this helps.
Hello,
Are these questions are similar or are identical to the actual test? Thank you.
Q7 – Please clarify – Branch-1 has a higher IP than Corp-4, does it not become a DR because its in the same segment as Branch-2?
one more thing about Q9 – would split Horizon have the reason for this not forming a neighbor relationship?
Dave – for Q7
This diagram has two segments and each segment will have a DR. The serial link between Corp-3 and Branch-1 is the separation.
So in the upper segment (Corp-1,2,3,4) – Corp-4 has the highest router-id and it is the DR for that segment.
And for the lower segment Branch-2 has the highest router-id and is the DR for that segment
Q7 – Please clarify – Branch-1 has a higher IP than Corp-4, does it not become a DR because its in the same segment as Branch-2?
No, because they are in different networks. The serial interface segment the networks and there are 2 “broadcast” networks. Therefore, the answer is Branch 2 and Corp 4.
@’Question 9′ – No, split horizon is relevant to Distance Vector protocols; OSPF is Link State.
i wanna the answer for Q.9 what is the true?
please , I want to know if anybody has taken the new ICND2 test this year 2015 and if so ve the questions changed. please reply me if u . ve authentic answers cos am about to sit for ICND2 . thanks in advance. –MODEST
actually about question 9, if you look closely there is no IP address on R2’s serial interface >.> the rest of the topology is addressed. The answer is A.
can someone please send me the latest questions?
notacubsfan06@yahoo.com
hello,
i created a simple topologi with 3 roter and 3 switch and 6 PC but all pc is communicating in self network but i configures ospf correctly 1 to 1 step but it is not connecting to other router please
help me
What are two enhancements that OSPFv3 supports over OSPFv2? (Choose two.)
A. It requires the use of ARP.
B. It can support multiple IPv6 subnets on a single link.
C. It supports up to 2 instances of OSPFv3 over a common link.
D. It routes over links rather than over networks.
Answer: B, D
passed on 3/13. questions 4,7, and 8 on it. tks 9tut
q9 checked at wireshark, it seems that B is correct.
OSPF is a LINK STATE protocol. It builds its own table based off of neighbor connected LSAs. The LSAs just transmit what they know about their connected and configured settings.
Q9 is just weird/trick wording
R2 output of sh ip route
200.0.0.0/30 is subnetted, 1 subnets
O 200.0.0.0 [110/128] via 172.16.100.1, 00:01:57, Serial0/0
172.16.0.0/16 is variably subnetted, 6 subnets, 4 masks
O 172.16.100.129/32 [110/65] via 172.16.100.1, 00:05:16, Serial0/0
O 172.16.100.65/32 [110/65] via 172.16.100.1, 00:05:16, Serial0/0
C 172.16.32.0/22 is directly connected, Loopback32
C 172.16.16.0/20 is directly connected, Loopback16
C 172.16.0.0/20 is directly connected, Loopback0
C 172.16.100.0/30 is directly connected, Serial0/0
O*E2 0.0.0.0/0 [110/1] via 172.16.100.1, 00:05:17, Serial0/0
R2#
As you can see, R2 did receive a full routing table, including the default route. A trace to 8.8.4.4 from R2 will result in a loop.
I got Q1, Q2, Q3, Q4, Q6, Q8, Q9 today in my ICND2 exam.
Thanks 9tut.
Anything new about Q9?
I’ve tried it on NADA dump and mobile app, they both agreed on:
“A. Router R2 will not form a neighbor relationship with R1” as the correct answer.
Having my exam on May 28th, wish me luck 🙂
Question 9 is b
The network is specified And it says r2 is operational
@All FYI
Wrote my ICND2 exam and had question 9.
As mentioned by other people here I answered A. no neighbor relation is being formed and passed with 1000.
The more I look at the question q1 mentions Ospf config in it. Q9 doesn’t so only r1 is configured for it and there for it the only one in the Ospf domain there for r2 can not receive and process Ospf packets. Answer a
I my exam same question # 9 was there and i think answer B is 100% correct.
9tut and everyone else – Question 9 is incorrect. The answer is A. I took the exam recently and selected A. I got 1000/1000.
Got 4,5,9 today.
can someone answer this question.
What OSPF command, when configured, will include all interfaces into area 0?
A. network 0.0.0.0 255.255.255.255 area 0
B. network 0.0.0.0 0.0.0.0 area 0
C. network 255.255.255.255 0.0.0.0 area 0
D. network all-interfaces area 0
Answer: A
This is what I got from the dump but I read some people tell me the answer is B. So which one is it?
This is the part I’m confused because I always thought it was B too but the dumps are giving me answer of A.
Can someone clarify this for me?
Thanks.
Hi Everyone,
Q9:
I would say that A is correct.
C:Wrong. If it gets ospf updates, it will surely get information about default route.
D:Wrong. Not possible. It would get a route for directly connected route.
B:Wrong. Router R2 runs ospf! Unlike distance vector protocols, such as RIP, OSPF would not
obtain “ A FULL ROUTING TABLE”, from neighbours only LSAs which are data structures. It would then build routing table using those LSAs.
guys download dumps with nuggets free from this following link
wurl. cc/dumps
Marcus
I want 1000pts, i wil take icnd2 on wednesday, i wil go with answer A for Q9
Just took the test today – 980/1000 ALL 9 questions came from this page either as normal questions or in the sims. Thanks 9tuts! Also got Frame Relay, EIGRP and OSPF labs
THERE IS NO NEED FOR ANY DUMPS – just study one book (Wendel or Todd) and the you tube lessons available free for visual knowledge. Along with 9tuts these are enough for 900 and over marks with ease.
But you MUST understand the concepts and not mug up the answer as they change the options and answers
@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
by any chance are you going to put those flash simulations again?
Question 9 seems quite controversial! I immediately said B, since the diagram shows that routers R1 and R2 are in OSPF area 0 so they must have formed neighbor status – this immediately rules out option A!
I would take answer B, and when I take my exam in a few weeks I will report back if I get this question.
Furthermore, Keith Barker from CBT Nuggets agrees that the answer is B, which is good enough for me! See here https://learningnetwork.cisco.com/thread/15569
Question 9. answer is A or B ?
I think the reason people thing the answer to Q9 is A is because the config in the exhibit includes the command:
‘router ospf 1’
The answer A says that the routers would not form neighbors – I think people are (incorrectly) assuming that the number 1 in the command is putting the router in a different area.
The bottom line is that the routers will most certainly become neighbors, so that explicitly rules out answer A!
The answer is B and when I take the exam next week will definitely choose B. Also as per my previous post, the Cisco experts at CBTNuggets agree with me.
Revisit of “Question 9”
Look also at question 1. They both use the same network diagram and routing configuration for R1.
The correct answer for question 1 is that “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.”
Thus providing an explanation why the correct answer for question 9 is “Router R2 will obtain a full routing table, including a default route, from R1.” All the other answers are incorrect, leaving only the one that is correct.
Those who have tried to duplicate this in a simulator should prove this with no problem.
As for those who say the correct answer is “A”, that may have been the letter defining the correct answer on the exam. Remember, the answers are not always in the same order as on this website.
10000000% answer is A. Just passed the test with 1000 score and I picked A
I found the answers here but where can I find the questions