CCNA 3 Chapter 9: Multiarea OSPF (v5.0.3 + v6.0) Exam Answers – 100% Result

Certification Answers

Q1. What are two reasons for creating an OSPF networkWhat information is contained within an OSPF type 4 LSA with multiple areas? (Choose two.)

  • to simplify configuration
  • to reduce SPF calculations
  • to reduce use of memory and processor resources
  • to provide areas in the network for routers that are not running OSPF
  • to ensure that an area is used to connect the network to the Internet
Explanation:  If a router is not running OSPF, it is not configurable with an OSPF area. OSPF areas have no direct relationship with the Internet. Routers that run OSPF can connect to the Internet, but multiple OSPF areas are not required for this purpose. OSPF areas help to decrease the demand for router memory and processing power by limiting OSPF protocol traffic, keeping link-state databases small, and requiring fewer SPF recalculations. Multiarea OSPF requires additional steps to configure and therefore does not simplify the configuration process.

Q2. What is used to facilitate hierarchical routing in OSPF?

  • requent SPF calculations
  • autosummarization
  • the election of designated routers
  • the use of multiple areas
Explanation:  OSPF supports the concept of areas to prevent larger routing tables, excessive SPF calculations, and large LSDBs. Only routers within an area share link-state information. This allows OSPF to scale in a hierarchical fashion with all areas that connect to a backbone area.

Q3. A network administrator is verifying a multi-area OSPF configuration by checking the routing table on a router in area 1. The administrator notices a route to a network that is connected to a router in area 2. Which code appears in front of this route in the routing table within area 1?

  • C
  • O
  • O IA
  • O E2
Explanation:  In a routing table, a route with the code O IA indicates a network that is learned from another area and received by the ABR as an external LSA. The ABR has flooded the route into its area so that internal routers may add it to their databases. Label C would indicate a network that is directly connected to an interface on the router. Label O would indicate a network that is advertised by another router in the same area. Label O E2 would indicate an external network (non-OSPF network) that is advertised by an ASBR.

Q4. Which two statements correctly describe OSPF type 3 LSAs? (Choose two.)

  • Type 3 LSAs are known as autonomous system external LSA entries.
  • Type 3 LSAs are known as router link entries.
  • Type 3 LSAs are used for routes to networks outside the OSPF autonomous system.
  • Type 3 LSAs are used to update routes between OSPF areas.
  • Type 3 LSAs are generated without requiring a full SPF calculation.
Explanation:  Type 4 LSAs are known as autonomous system external LSA entries. Type 4 LSAs are generated by an ABR to inform other areas of next-hop information for the ASBR. Type 1 LSAs are known as router link entries. Type 3 LSAs can be generated without requiring a full SPF calculation. Type 3 LSAs are used to carry routes between OSPF areas.

Q5. Which characteristic describes both ABRs and ASBRs that are implemented in a multiarea OSPF network?

  • They are required to reload frequently and quickly in order to update the LSDB.
  • They both run multiple routing protocols simultaneously.
  • They are required to perform any summarization or redistribution tasks.
  • They usually have many local networks attached.
Explanation:  ABRs and ASBRs need to perform any summarization or redistribution among multiple areas, and thus demand more router resources than a regular router in an OSPF area.

Q6. What type of OSPF LSA is originated by ASBR routers to advertise external routes?

  • type 5
  • type 2
  • type 3
  • type 1
Explanation:  OSPF has many different LSA types.
type 1 – contains a list of directly connected interfaces
type 2 – only exists for multiaccess networks and includes DR router ID
type 3 – used by ABRs to advertise networks from other areas
type 4 – generated by ABRs to identify an ASBR and provides a route to it
type 5 – originated by ASBRs to advertise external routes

Q7. What OSPF LSA type is used to inform routers of the router ID of the DR in each multiaccess network in an OSPF area?

  • type 3
  • type 2
  • type 1
  • type 4
Explanation:  OSPF has many different LSA types.
type 1 – contains a list of directly connected interfaces
type 2 – only exists for multiaccess networks and includes DR router ID
type 3 – used by ABRs to advertise networks from other areas
type 4 – generated by ABRs to identify an ASBR and provide a route to it

Q8. Question

Explanation:  No answer description available for this question

Q9. What information is contained within an OSPF type 4 LSA?

  • summarized routes from other areas
  • the RID of the DR
  • the route to an ABR
  • the route to an ASBR
Explanation:  No answer description available for this question

Q10. Which type of OSPF router has interfaces connected to multiple OSPF areas?

  • BDR
  • ABR
  • ASBR
  • DR
Explanation:  OSPF Area Border Routers (ABRs) are used to connect OSPF areas. The ABR generates type 3 LSAs to advertise networks between areas.

Q11. What routing table descriptor is used to identify OSPF summary networks that originate from an ABR?

  • O IA
  • O E1
  • O E2
  • O
Explanation:  O – intra-area routes learned from a DR
O IA – summary interarea routes that are learned from a ABR
O E1 or O E2 – external routes that are learned from an ASBR

Q12. Question

Explanation:  No answer description available for this question

Q13. Question

Explanation:  No answer description available for this question

Q14. Which three steps in the design and implementation of a multiarea OSPF network are considered planning steps? (Choose three.)

  • Troubleshoot the configurations.
  • Define the network requirements.
  • Configure OSPF.
  • Gather the required parameters.
  • Verify OSPF.
  • Define the OSPF parameters.
Explanation:  The best practice for implementing a multiarea OSPF network includes the steps: (1) Define the network requirements. (2) Gather the required parameters. (3) Define the OSPF parameters. (4) Configure OSPF. (5) Verify OSPF. Steps 1-3 are considered the planning steps in the process.

Q15. Which two networks are part of the summary route 192.168.32.0/22? (Choose two.)

  • 192.168.35.0/24
  • 192.168.38.0/24
  • 192.168.37.0/24
  • 192.168.36.0/24
  • 192.168.33.0/24
  • 192.168.31.0/24
Explanation:  The summary route 192.168.32.0/22 would include networks 192.168.32.0/24, 192.168.33.0/24, 192.168.34.0/24, and 192.168.35.0/24.

Q16. Refer the the exibit. What is the role of router R2 in the OSPF domain?

  • BDR
  • DR
  • ABR
  • ASBR
Explanation:  No answer description available for this question

Q17. Question

Explanation:  No answer description available for this question

Q18. Which type of OSPF router will generate type 3 LSAs?

  • BDR
  • DR
  • ASBR
  • ABR
Explanation:  Type 3 OSPF LSAs are generated by Area Border Routers (ABRs) to advertise networks between OSPF areas.

Q19. Which type of OSPF LSA is generated by an ASBR and includes external routes?

  • type 2
  • type 4
  • type 3
  • type 5
Explanation:  Type 5 LSAs are generated by ASBRs to advertise routes learned from an external domain into OSPF.

Q20. Question

Explanation:  No answer description available for this question

Q21. What are two reasons for creating an OSPF network with multiple areas? (Choose two.)

  • to simplify configuration
  • to ensure that an area is used to connect the network to the Internet
  • to reduce SPF calculations
  • to provide areas in the network for routers that are not running OSPF
  • to reduce use of memory and processor resources
Explanation:  If a router is not running OSPF, it is not configurable with an OSPF area. OSPF areas have no direct relationship with the Internet. Routers that run OSPF can connect to the Internet, but multiple OSPF areas are not required for this purpose. OSPF areas help to decrease the demand for router memory and processing power by limiting OSPF protocol traffic, keeping link-state databases small, and requiring fewer SPF recalculations. Multiarea OSPF requires additional steps to configure and therefore does not simplify the configuration process.

Q22. Question

Explanation:  No answer description available for this question

Q23. The network administrator has been asked to summarize the routes for a new OSPF area. The networks to be summarized are 172.16.8.0, 172.16.10.0, and 172.16.12.0 with subnet masks of 255.255.255.0 for each network. Which command should the administrator use to forward the summary route for area 15 into area 0?

  • area 15 range 172.16.8.0 255.255.255.248
  • area 0 range 172.16.8.0 255.255.255.248
  • area 0 range 172.16.8.0 255.255.248.0
  • area 15 range 172.16.8.0 255.255.248.0
Explanation:  Because all OSPF networks start with area 0, the new area would need to be anything but area 0, The correct option would be area 15 range 172.16.8.0 255.255.248.0 because this is the correct summarization of the networks in the new area 15. The summarization must come from area 15 to area 0, because all OSPF areas interconnect via area 0. The matching bits for the correct option, in binary, are:
172.16.8.0 10101100.00010000.00001 000.00000000
172.16.10.0 10101100.00010000.00001 010.00000000
172.16.12.0 10101100.00010000.00001 100.00000000

Q24. Question

Explanation:  No answer description available for this question

Q25. Fill in the blank. Do not use acronyms.

OSPF type 2 LSA messages are only generated by the designated router to advertise routes in multiaccess networks.
Explanation:  The type 2 LSAs are generated by the designated router in multiaccess and nonbroadcast multiaccess networks.

Q26. Fill in the blank. Use a number.

An ASBR generates type 5 LSAs for each of its external routes and floods them into the area that it is connected to.
Explanation:  No answer description available for this question

Q27. Fill in the blank. Use a number.

A type 4 LSA identifies the ASBR and provides a route to it.
Explanation:  No answer description available for this question

Q28. Question

Explanation:  No answer description available for this question

Q29. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Why are users in the OSPF network not able to access the Internet?

  • The default route is not redistributed correctly from router R1 by OSPF.
  • The network statement is misconfigured on router R1.
  • The OSPF network statements are misconfigured on routers R2 and R3.
  • The OSPF timers that are configured on routers R1, R2, and R3 are not compatible.
  • The interface that is connected to the ISP router is down.
Explanation:  The configuration of the redistribution of the default route on the router R1 is correct. The interface that is located between the router R1 and the ISP is operational. The OSPF timers of the routers R1, R2, and R3 are set to default. The network statement on router R1 contains an error in the network address.

Q30. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Fill in the blank. Do not use abbreviations. What is the missing command on router R2 to establish an adjacency between routers R1 and R3?

  • network 172.16.10.0 0.0.0.255 area 0
Explanation:  No answer description available for this question

Q31. Which IOS 12.4 software package integrates full features, including voice, security, and VPN capabilities, for all routing protocols?

  • Advanced Security
  • Advanced IP Services
  • Advanced Enterprise Services
  • Service Provider Services
Explanation:  No answer description available for this question

Q32. What is the major release number in the IOS image name c1900-universalk9-mz.SPA.152-3.T.bin?

  • 2
  • 3
  • 15
  • 52
  • 1900
Explanation:  No answer description available for this question

Q33. What statement describes a Cisco IOS image with the “universalk9_npe” designation for Cisco ISR G2 routers?

  • It is an IOS version that can only be used in the United States of America.
  • It is an IOS version that provides only the IPBase feature set.
  • It is an IOS version that offers all of the Cisco IOS Software feature sets.
  • It is an IOS version that, at the request of some countries, removes any strong cryptographic functionality.
Explanation:  No answer description available for this question

Q34. Which statement describes a difference between the IOS 15.0 extended maintenance release and a standard maintenance release?

  • They consist of two separate parallel trains.
  • The extended maintenance release will deliver new IOS features as soon as they are available.
  • The standard maintenance release enables faster IOS feature delivery than the extended maintenance release does.
  • A new standard maintenance release will synchronize with the latest extended maintenance release before the extended is made available.
Explanation:  No answer description available for this question

Q35. When a router is powered on, where will the router first search for a valid IOS image to load by default?

  • RAM
  • ROM
  • flash memory
  • NVRAM
Explanation:  By default, if no boot system commands are in the configuration, a router will load the first valid Cisco IOS image in flash memory and run it. RAM is active memory that is not used to store image files. NVRAM stores configuration files. ROM stores a minimal version of the Cisco IOS image that can be used to provide limited functions if a valid IOS image is not available in flash memory.

Q36. A network engineer is upgrading the Cisco IOS image on a 2900 series ISR. What command could the engineer use to verify the total amount of flash memory as well as how much flash memory is currently available?

  • show flash0:
  • show version
  • show interfaces
  • show startup-config
Explanation:  No answer description available for this question

Q37. The customer of a networking company requires VPN connectivity for workers who must travel frequently. To support the VPN server, the customer router must be upgraded to a new Cisco IOS software version with the Advanced IP Services feature set. What should the field engineer do before copying the new IOS to the router?

  • Set the router to load the new IOS image file directly from the TFTP server on the next reboot.
  • Delete the currently installed IOS by using the erase flash: command, and reload the router
  • Issue the show running-configuration command to determine the features of the currently installed IOS image file.
  • Issue the show version and the show flash commands to ensure that the router has enough memory and file space to support the new IOS image.
Explanation:  No answer description available for this question

Q38. A network administrator configures a router with the command sequence:

R1(config)# boot system tftp://c1900-universalk9-mz.SPA.152-4.M3.bin
R1(config)# boot system rom

What is the effect of the command sequence?

  • On next reboot, the router will load the IOS image from ROM.
  • The router will copy the IOS image from the TFTP server and then reboot the system.
  • The router will load IOS from the TFTP server. If the image fails to load, it will load the IOS image from ROM.
  • The router will search and load a valid IOS image in the sequence of flash, TFTP, and ROM.
Explanation:  No answer description available for this question

Q39. Beginning with the Cisco IOS Software Release 15.0, which license is a prerequisite for installing additional technology pack licenses?

  • IPBase
  • DATA
  • UC
  • SEC
Explanation:  No answer description available for this question

Q40. Which three software packages are available for Cisco IOS Release 15.0?

  • DATA
  • IPVoice
  • Security
  • Enterprise Services
  • Unified Communications
  • Advanced IP Services
Explanation:  No answer description available for this question

Q41. When a customer purchases a Cisco IOS 15.0 software package, what serves as the receipt for that customer and is used to obtain the license as well?

  • Software Claim Certificate
  • End User License Agreement
  • Unique Device Identifier
  • Product Activation Key
Explanation:  No answer description available for this question

Q42. Which command would a network engineer use to find the unique device identifier of a Cisco router?

  • show version
  • show license udi
  • show running-configuration
  • license install stored-location-url
Explanation:  No answer description available for this question

Q43. A newly hired network engineer wants to use a 2911 router from storage. What command would the technician use to verify which IOS technology licenses have been activated on the router?

  • show flash0:
  • show interfaces
  • show license
  • show startup-config
  • show version
Explanation:  No answer description available for this question

Q44. Which command is used to configure a one-time acceptance of the EULA for all Cisco IOS software packages and features?

  • license save
  • show license
  • license boot module module-name
  • license accept end user agreement
Explanation:  No answer description available for this question

Q45. How long is the evaluation license period for Cisco IOS Release 15.0 software packages?

  • 15 days
  • 30 days
  • 60 days
  • 180 days
Explanation:  Valuation licenses are good for a 60-day period. After 60 days, the evaluation license automatically changes to a Right-to-Use license.

Q46. What is the purpose of a T train release in Cisco IOS 15?

  • It is used for long-term maintenance, enabling customers to qualify, deploy, and remain on the release for an extended period.
  • It provides regular bug fix maintenance rebuilds, plus critical fix support for network-affecting bugs.
  • It provides premium packages and enables additional IOS software feature combinations that address more complex network requirements.
  • It specifies advanced IP services features such as advanced security and service provider packages.
Explanation:  No answer description available for this question

Q47. What code in the Cisco IOS 15 image filename c1900-universalk9-mz.SPA.153-3.M.bin indicates that the file is digitally signed by Cisco?

  • SPA
  • universalk9
  • M
  • mz
Explanation:  No answer description available for this question

Q48. What statement describes a Cisco IOS image with the “universalk9_npe” designation for Cisco ISR G2 routers?

  • It is an IOS version that, at the request of some countries, removes any strong cryptographic functionality.​
  • It is an IOS version that provides only the IPBase feature set.
  • It is an IOS version that offers all of the Cisco IOS Software feature sets.
  • It is an IOS version that can only be used in the United States of America.
Explanation:  No answer description available for this question

Q49. How long is the evaluation license period for Cisco IOS Release 15.0 software packages?

  • 30 days
  • 15 days
  • 60 days
  • 180 days
Explanation:  No answer description available for this question

Q50. Fill in the blank. Do not use abbreviations.

The license “install” flash0:seck9-C1900-SPE150_K9-FAB12340099.xml command will restore the specified saved Cisco IOS Release 15 license to a router.
Explanation:  No answer description available for this question

Q51. Question

Explanation:  No answer description available for this question

Q52. Question

Explanation:  No answer description available for this question

Q53. Question

Explanation:  No answer description available for this question

Q54. In addition to IPBase, what are the three technology packs that are shipped within the universal Cisco IOS Software Release 15 image? (Choose three.)

  • Advanced IP Service
  • SP Services
  • Unified Communications
  • Security
  • DATA
Explanation:  No answer description available for this question

Q55. What code in the Cisco IOS 15 image filename c1900-universalk9-mz.SPA.153-3.M.bin indicates that the file is digitally signed by Cisco?

  • M
  • universalk9
  • mz
  • SPA
Explanation:  No answer description available for this question

Q56. Which two conditions should the network administrator verify before attempting to upgrade a Cisco IOS image using a TFTP server? (Choose two.)

  • Verify the name of the TFTP server using the show hosts command.
  • Verify that the TFTP server is running using the tftpdnld command.
  • Verify that the checksum for the image is valid using the show version command.
  • Verify connectivity between the router and TFTP server using the ping command.
  • Verify that there is enough flash memory for the new Cisco IOS image using the show flash command.
Explanation:  No answer description available for this question

Q57. Which three images are considered premium software packages for Cisco IOS Release 12.4? (Choose three.)

  • IP Voice
  • Enterprise Base
  • Advanced Security
  • Enterprise Services
  • Advanced IP Services
  • Advanced Enterprise Services
Explanation:  No answer description available for this question

Q58. A network technician is troubleshooting problems with a router that is running IOS 15. Which command will display the features activated for the licenses that are installed on the router?

  • show flash0:
  • show license
  • show startup-config
  • show version
Explanation:  No answer description available for this question

Q59. Question

Explanation:  No answer description available for this question