Link State and OSPF

[S9539245H]

Refer to the exhibit. What does JAX do with link-state packets from ORL?

sends out its updated routing table to both ORL and BOS routers

sends out the individual link-state packets out the interface connected to BOS

queries BOS to see if it has a better route

only adds it to the local routing table and performs no other actions

Answer:D

12) Refer to the exhibit. Routers R1, R2, and R3 have four local LANs attached. What is a correct set of network commands that will cause OSPF to be enabled for any R1 interface that is connected to its subnets?

A) R1(config-router)# network 10.10.1.0 0.0.3.255 area 0 R1(config-router)# network 172.16.1.0 0.0.0.7 area 0

B) R1(config-router)# network 10.10.0.0 0.0.255.255 area 0 R1(config-router)# network 172.16.1.0 0.0.0.7 area 0

C) R1(config-router)# network 10.10.0.0 0.0.3.255 area 0 R1(config-router)# network 172.16.1.0 0.0.0.3 area 0 R1(config-router)# network 172.16.1.8 0.0.0.3 area 0

D) R1(config-router)# network 10.10.0.0 0.0.0.255 area 0 R1(config-router)# network 10.10.1.0 0.0.0.255 area 0 R1(config-router)# network 10.10.2.0 0.0.0.255 area 0 R1(config-router)# network 10.10.3.0 0.0.0.255 area 0 R1(config-router)# network 172.16.1.0 0.0.0.7 area 0

Ans:C

14) Refer to the exhibit. What does the "O*E2" from the "O*E2 0.0.0.0/0 [110/1] via 192.168.1.1, 00:05:34, Serial0/0/1" line represent?
	an internal type 2 OSPF route
	an external OSPF route at least two hops away
	an external OSPF route from two different sources
	an external OSPF route that will not increment in cost
	the route was distributed into OSPF from a type 2 router

Ans:D

15) Refer to the exhibit. All routers are running OSPF. What cost would JAX put in its routing table for the 10.0.0.0/24 network?
	2
	156
	1564
	1785
	1787

Ans:1785

17) Refer to the exhibit. Routers A, B, C, and D are all running OSPF with default router IDs and OSPF interface priorities. Loopback interfaces are not configured and all interfaces are operational. Router D is the DR and router C is the BDR. What happens immediately after the following commands are entered on router A? A(config)# interface fa0/0 A(config-if)# ip ospf priority 255
	A will become the DR. D will become the BDR.
	A will become the DR. C will remain the BDR.
	D will remain the DR. A will become the BDR.
	D will remain the DR. C will remain the BDR.

19

What range of networks will be advertised in the OSPF updates by the command Router1(config-router)# network 192.168.0.0 0.0.15.255 area 100? 192.168.0.0/24 through 192.168.0.15/24 192.168.0.0/24 through 192.168.15.0/24 192.168.15.0/24 through 192.168.31.0/24 192.168.15.0/24 through 192.168.255.0/24 192.168.16.0/24 through 192.168.255.0/24

22) Refer to the exhibit. The routers in the exhibit are using default OSPF configuration settings to advertise all attached networks. If all of the routers start at the same time, what will be the result of the DR and BDR elections for this single area OSPF network? (Choose three.)

HQ will be DR for 10.4.0.0/16.

Router A will be DR for 10.4.0.0/16.

HQ will be BDR for 10.4.0.0/16.

Router A will be DR for 10.5.0.0/16.

23) A fully converged five router OSPF network has been running successfully for several weeks. All configurations have been saved and no static routes are used. If one router looses power and reboots, what information will be in its routing table after the configuration file is loaded but before OSPF has converged?
	All routes for the entire network will be present.
	Directly connected networks that are operational will be in the routing table.
	Because the SPF algorithm has not completed all calculations, no routes will be in the table.
	A summary route for all previously learned routes will automatically appear in the routing table until all LSPs have been received by the router.

24) Refer to the exhibit. How many OSPF adjacencies must be formed to build the complete topology if a DR or BDR were not elected in this OSPF network?
	4
	5
	6
	7
	10

Please help me with these questions and explain them briefly to me. thanks a lot!

[blau grana]

Hello,

any of uploaded pictures are available.

Best Regards

Please rate all helpful posts and close solved questions

[S9539245H]

Hi Blau Grana, really sorry for the late reply. I had no idea what happened to the pictures, so i reuploaded it again.

[InayathUlla Sharieff]

Hi Jason,

Not able to understand whats your query?

The pictures are not visible. Please provide us the document link to check the same.

Regards

Inayath

[S9539245H]

Hi InayathUlla, really sorry for the late reply. I had no idea what happened to the pictures, so i reuploaded it again.

[ciscoamit_497]

@Jason...

Nothing is clear here bro...

[S9539245H]

Hi Amit, really sorry for the late reply. I had no idea what happened to the pictures, so i reuploaded it again.

[blau grana]

Hello,

I hope these are correct answers:

#1

I think correct answer is B

-> sends out the individual link-state packets out the interface connected to BOS

#2

C

I think it is clear why.

#3

D

There are two types of OSPF external routes:

- E1 type 1, their cost after redistribution is incremented 

- E2 type 2, their cost after redistribution is not incremented, this is default state if not configured otherwise

#4

E

1785, you just add costs of all intermediate links.

#5

D

DR and BDR are elected only after startup or if one of them fails.

#6

B

#7

I think only B,C is correct

#8

B

#9

C

Did I pass?

Best Regards

Please rate all helpful posts and close solved questions