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Nokia OSPF Routing Protocol Exam is an advanced-level certification that requires candidates to have a solid understanding of networking concepts, routing protocols, and Nokia systems. It is recommended that candidates have at least two years of experience working with Nokia equipment and have completed the Nokia Network Routing Specialist I and II courses before attempting 4A0-113 exam.

Nokia 4A0-113 Certification Exam is designed for network professionals who want to validate their skills and knowledge in the Nokia OSPF routing protocol. OSPF (Open Shortest Path First) is a widely used routing protocol that is used to determine the best path for data to travel through a network. The Nokia 4A0-113 Certification Exam covers the basics of OSPF operation, configuration, and troubleshooting. It is a comprehensive exam that tests the candidate's ability to design, implement, and maintain OSPF networks.

Nokia 4A0-113 certification exam is designed to test the knowledge and skills of network professionals who work with the Nokia OSPF routing protocol. Nokia OSPF Routing Protocol Exam certification is ideal for individuals who are responsible for designing, implementing, and maintaining large-scale networks that use OSPF as the primary routing protocol.

 

NEW QUESTION # 52
Which of the following statements regarding the election of the designated router (DR) by OSPF routers are true? (Choose two)

• A. The router with the lowest priority is the DR.
• B. If priorities are the same, the DR is chosen based on the lowest RID.
• C. If priorities are the same, the DR is chosen based on the highest RID.
• D. The router with the highest priority is the DR.

Answer: C,D

NEW QUESTION # 53
Which of the following cannot be used as a matching criterion in route policy statements?

• A. Source IP address
• B. Protocol type
• C. TCP source port
• D. Prefix list

Answer: B

NEW QUESTION # 54
Refer to the exhibit.

Assume that OSPFv3 is properly configured on all routers and that R4 advertises its system prefix into Area 0. Which of the following statements best describes how R5 learns R4's IPv6 system prefix?

• A. With a Router LSA originated by R4
• B. With an Inter-Area Prefix LSA originated by R5
• C. With an Inter-Area Prefix LSA originated by R1
• D. With an Inter-Area Prefix LSA originated by R4
• E. With a Router LSA originated by R5
• F. With a Router LSA originated by R1

Answer: C

NEW QUESTION # 55
Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that there are no stub networks, which of the following statements regarding type 4 LSA generation is true?

• A. Router R3 generates a type 4 LSA that is flooded to area 0, and router R6 generates a type 4 LSA that is flooded to area 2.
• B. Router R3 generates a type 4 LSA that is flooded to areas 0, 1, and 2.
• C. Router R3 generates a type 4 LSA that is flooded to areas 0 and 2.
• D. Router R1 generates a type 4 LSA that is flooded to areas 0, 1, and 2.

Answer: A

NEW QUESTION # 56
Which LSA type is not found in point-to-point only OSPF networks?

• A. Type 1 Router LSA
• B. Type 3 Summary LSA
• C. Type 5 External LSA
• D. Type 2 Network LS A

Answer: D

NEW QUESTION # 57
Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Assuming that there are no stub networks, which of the following statements regarding Type 4 LSA generation is true?

• A. Router R3 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.
• B. Router R1 generates a Type 4 LSA that is flooded to areas 0, 1, and 2.
• C. Router R3 generates a Type 4 LSA that is flooded to area 0, and router R6 generates a Type 4 LSA that is flooded to area 2.
• D. Router R3 generates a Type 4 LSA that is flooded to areas 0 and 2.

Answer: C

Explanation:
Let's break it down step-by-step:
Type 4 LSAs are generated by ABRs (Area Border Routers) to advertise the ASBR's Router ID to other areas.
The ASBR itself (R1) does not generate Type 4 LSAs.
R1 belongs to Area 1.
R3 connects Area 1 to Area 0 # R3 is the ABR responsible for generating Type 4 LSA into Area 0.
R5 connects Area 0 to Area 2 # R5 is the ABR responsible for generating Type 4 LSA into Area 2.
Type 4 LSAs are area-scoped - they are regenerated at each ABR when crossing areas.
Now let's analyze the options:
A - Incorrect: R1 (the ASBR) does not generate Type 4 LSAs.
B - Incorrect: R3 does not flood into all areas.
C - Incorrect: R3 does not flood into Area 2.
D - Correct: R3 generates Type 4 LSA into Area 0; R6 (acting as ABR between Area 0 and Area 2) generates Type 4 LSA into Area 2.
Thus, the correct answer is: D

NEW QUESTION # 58
What is the source IP address in an OSPF update?

• A. The system address of the router
• B. The unicast IP address of the interface the update is being sent on.
• C. 224.0.0.6
• D. 224.0.0.5

Answer: B

NEW QUESTION # 59
Click the exhibit button.

192.168.3.1 is a loopback interface on router R2 and is distributed to OSPF area 0, but the ping fails from router R3. Which of the following is a possible solution to the problem?

• A. Add the "originate-default-route" option in the NSSA area configuration on router R3
• B. Add the "summaries" option to the NSSA area configuration on router R1
• C. Make a static route on router R1 to 192.168.3.1
• D. Make a default route on router R2

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF NSSA Behavior):
NSSA areas do not receive Type 5 or Type 3 LSAs unless specifically translated or redistributed.
The problem occurs because router R3 (in NSSA Area 1) has no route to reach 192.168.3.1 unless a default route is injected.
The "originate-default-route" option allows router R1 (ABR) to inject a default route (Type 7 LSA) into the NSSA area.
Thus, correct answer: A.

NEW QUESTION # 60
A default route for a client is also known as the:

• A. Default gateway
• B. Proxy ARP
• C. Default path
• D. Gateway path

Answer: A

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS IP Fundamentals Guide:
"Default gateway is the IP address of the next-hop router to which packets are forwarded when there's no specific route in the client's routing table." Thus, correct answer is B.
-

NEW QUESTION # 61
From the list below select the statements that describe the behavior of link state information aging. (Choose 2)

• A. The age is incremented or decremented as it is flooded from router to router and as it is held in the topological database.
• B. The age for newly created link state information is set to 1200 for OSPF and 0 for IS-IS
• C. The age for newly created link state information is set to 0 for OSPF and 1200 for IS-IS
• D. The age is incremented or decremented only as it is held in the topological database and not as it is flooded router to router.

Answer: A,C

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF and IS-IS LSA Aging Rules):
A (Correct): OSPF starts LSAs with age 0, IS-IS starts with age 1200 seconds.
C (Correct): LSA/LSP age is incremented both during database retention and while being flooded.
Thus, correct answers are A and C.

NEW QUESTION # 62
In an IP datagram, which field identifies the receiving application

• A. The protocol field of the network layer header
• B. The port field of the network layer address
• C. The protocol field of the transport layer header
• D. The port field of the transport layer header

Answer: D

NEW QUESTION # 63
Click the exhibit button.

What triggers convergence of the routing protocol when the link between switch 1 and switch 2 goes down?

• A. Convergence is triggered when the adjacency between routers R1 and R2 drops as a result of Hello timeouts. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.
• B. Convergence is triggered when the physical interfaces between routers R1 and R2 go down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.
• C. Convergence will not be triggered because switches cannot run routing protocols between them.
• D. Convergence is triggered when an LSA is sent from router R1 to router R2 to indicate that the link is down. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged.
• E. Convergence is triggered when the switches notify the routers about the link state information. At this point, both routers R1 and R2 re-compute their link state database and send updates to their adjacent routers. Once the process is complete for all routers, the networks have converged

Answer: A

NEW QUESTION # 64
Which of the LSA types stay within an OSPF area and are not exported outside of the area? (Choose all that apply)

• A. Summary Router LSA
• B. Summary Network LSA
• C. Router LSA
• D. Network LSA

Answer: C,D

Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF LSA Types Summary):
A: Type 1 - Router LSA # Stays within the originating area.
B: Type 2 - Network LSA # Stays within the originating area.
C: Type 3 - Summary Network LSA # Flooded between areas by ABRs.
D: Type 3 - Summary Router LSA # Same as above.
Thus, correct answers: A, B.
-

NEW QUESTION # 65
Click the exhibit button.

In the topology shown, router R1 is an ASBR configured to export external routes to OSPF. Which of the following statements regarding the OSPF LSAs in the network is true?

• A. Router R1 generates a type 7 LSA that is flooded through all OSPF areas.
• B. Router R1 generates a type 5 LSA that is flooded through all OSPF areas.
• C. Router R1 generates a type 7 LSA that is flooded through area 1. Router R3 generates a type 5 LSA that is flooded through areas 0 and 2.
• D. Router R1 generates a type 5 LSA that is flooded through area 1. Router R2 generates a type 7 LSA that is flooded through areas 0 and 2.

Answer: C

NEW QUESTION # 66
Click the exhibit button.

The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in?

• A. The adjacency state is two way because both routers have received a database description packet.
• B. The adjacency state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.
• C. The adjacency is in the exchange state. The next step is to exchange link state request and link state update packets.
• D. The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.

Answer: D

NEW QUESTION # 67
What is the source IP address in an OSPF update?

• A. The unicast IP address of the interface the update is sent on
• B. 224.0.0.6
• C. The system address of the router.
• D. 224.0.0.5

Answer: A

NEW QUESTION # 68
Choose the Distance Vector Protocols from the list below:

• A. RIPv2
• B. OSPF
• C. RIPv1
• D. IS-IS

Answer: A,C

NEW QUESTION # 69
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