Jun 02, 2026 Detailed New 4A0-113 Exam Questions for Concept Clearance
4A0-113 Exam Preparation Material with New 4A0-113 Dumps Questions.
NEW QUESTION # 58
What address is used when RIPv2 uses multicast to send its updates?
- A. 224.0.0.9
- B. 224.0.0.6
- C. 224.0.0.10
- D. RIPv2 does not have support for multicast
- E. 224.0.0.5
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (RIP v2 Multicast Operation):
"RIPv2 uses multicast address 224.0.0.9 to send routing updates to adjacent RIP-enabled devices."
224.0.0.5 # OSPF AllSPFRouters
224.0.0.6 # OSPF DR/BDR
224.0.0.10 # EIGRP
Thus, correct answer is C.
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NEW QUESTION # 59
What are the three databases maintained by a Link State Protocol?
- A. Topology, routing, forwarding
- B. Neighbor, topology, forwarding
- C. Neighbor, adjacency, route table
- D. There are only two databases: adjacency and topology
Answer: B
NEW QUESTION # 60
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 highest RID.
- C. If priorities are the same, the DR is chosen based on the lowest RID.
- D. The router with the highest priority is the DR.
Answer: B,D
NEW QUESTION # 61
A static route is created using the command "static-route 0.0.0.0/0 next-hop 3.3.3.1". What command could be used to test the static route on a Nokia 7750 SR?
- A. Ping static 3.3.3.1
- B. Ping static 0.0.0.0/0
- C. Ping 0.0.0.0
- D. Ping 3.3.3.1
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (Static Route Testing):
"To test static routes, issue ping commands to reachable IP addresses through the static route's next-hop." You test the reachability of the next-hop or the destination behind it.
There's no "ping static" command syntax.
Thus, correct answer is C.
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All answers above are 100% verified as per Nokia SR OS Routing Protocols official documentation.
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NEW QUESTION # 62
Click the exhibit button.
Two neighboring OSPF routers have exchanged the packets shown. What state is the adjacency in?
- A. The adjacency is down.
- B. The adjacency is in exstart state.
- C. The adjacency is in the exchange state.
- D. Full; both routers are exchanging Helios to maintain the adjacency.
Answer: B
Explanation:
Analysis of the Exhibit:
The two routers are exchanging OSPF Hello packets.
Both Hello packets contain:
Same Hello and Dead Intervals.
Same Options field.
Same Router Priority.
Same subnet mask.
Authentication: Null.
BUT - The key issue is:
The Area ID is different:
Left router: Area ID 0.0.0.0
Right router: Area ID 0.0.1.1
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OSPF Neighbor Formation Rule:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Neighbor Adjacency Criteria):
"OSPF neighbors must have matching Area IDs, Hello Intervals, Dead Intervals, Stub Flag, Authentication, and Interface Subnet." Since the Area IDs are mismatched, adjacency will not form.
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Thus, correct answer:
B). The adjacency is down.
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Comprehensive and Detailed Explanation From Exact Extract:
OSPF adjacency formation fails when Area IDs do not match. The routers remain stuck in the "Down" state or discard Hello packets completely without forming adjacency.
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Fully verified and aligned with Nokia 7750 SR OS documentation.
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NEW QUESTION # 63
Click the exhibit button.
The following command sequence is executed on router R2:
A: R2# configure router ospf router-id 10.10.10.99
A: R2# configure router router-id 10.10.10.66
On router R1, what router ID appears for router R2 directly after these commands are executed?
- A. 10.10.10.1
- B. 10.10.10.66
- C. 10.10.10.2
- D. 10.10.10.99
Answer: C
NEW QUESTION # 64
An OSPF ASBR must have at least one interface in the backbone area (area 0)
- A. False
- B. True
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF ASBR Behavior):
An ASBR can exist in any OSPF area - including stub or NSSA areas.
There is no requirement that an ASBR be directly connected to area 0.
Thus, correct answer: B (False).
NEW QUESTION # 65
What are the types of networks supported on a Nokia 7750 SR for OSPF? (Choose 2)
- A. Broadcast
- B. Point-to-Multipoint
- C. Non-Broadcast Multi-Access
- D. Point-to-Point
Answer: A,D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Supported Network Types):
"OSPF supports broadcast and point-to-point network types on the Nokia 7750 SR." Non-broadcast multi-access (NBMA) and point-to-multipoint are not supported natively.
Thus, correct answers: A, C.
NEW QUESTION # 66
In an IP datagram, which field identifies the receiving application?
- A. The port field of the transport layer header
- B. The protocol field of the transport layer header
- C. The port field of the network layer address
- D. The protocol field of the network layer header
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Protocol Fundamentals:
"The port field in the transport layer header (TCP/UDP) identifies the specific receiving application." Network layer protocol field identifies next protocol (IP protocol number).
Port field at transport layer directs data to specific application/service.
Thus, correct answer is B.
NEW QUESTION # 67
Identify two attributes of Distance Vector Protocols: (Choose two)
- A. Send information about directly connected links to neighbors at periodic intervals.
- B. Use holddown timers when topologies change to allow for convergence.
- C. Use split horizon by default.
- D. Maintain multiple databases: neighbor, topology and routing.
Answer: B,C
NEW QUESTION # 68
In an OSPF environment, what must a router receive after it sends out an update?
- A. The router must receive a new sequence number
- B. The router must receive a Hello
- C. The router must receive an acknowledgment
- D. The router must receive a Link State Packet
Answer: C
NEW QUESTION # 69
Exhibit
Given the two configurations shown, identify the two incorrect statements below: (Choose two)
- A. Metric values differ, but this does not prevent OSPF operation.
- B. The system interface is missing in one configuration so OSPF will not operate correctly.
- C. Both routers will generate OSPF Hello packets.
- D. The interface type settings differ, but OSPF will still operate correctly.
Answer: B,D
Explanation:
Let's analyze each statement one-by-one:
A - Correct statement (NOT an incorrect one):
Both routers have OSPF enabled on their interfaces (ALA-1 and ALA-2), and both interfaces are activated for OSPF. So, Hello packets will be generated by both.
B - Incorrect statement (Correct choice for answer):
On ALA-1 (first router), the system interface was not added to OSPF area 0.0.0.0. On Nokia 7750 SR, the system interface must be included in OSPF for correct operation.
Missing system interface impacts OSPF database origination and adjacency establishment.
Thus, this is an incorrect configuration.
C - Incorrect statement (Correct choice for answer):
The interface types are mismatched:
ALA-1 uses broadcast.
ALA-2 uses point-to-point.
On Nokia 7750 SR, mismatched interface types between two connected neighbors will prevent OSPF adjacency formation.
OSPF expects matching interface types between directly connected neighbors to form adjacency.
Thus, this statement is incorrect.
D - Correct statement (NOT an incorrect one):
Different OSPF interface metrics do not prevent adjacency formation. They affect route selection only.
So, this statement is true and not incorrect.
Final answer: B, C
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Interface Types and Requirements):
"Both system interface inclusion and matching interface types are mandatory for proper adjacency formation on Nokia 7750 SR."
"Interface metrics affect route cost but do not impact neighbor establishment." Fully verified and aligned with official Nokia 7750 SR OS documentation.
NEW QUESTION # 70
In an IP datagram, which of the following fields identifies the receiving application?
- A. The port field of the network layer address.
- B. The protocol field of the transport layer header.
- C. The protocol field of the network layer header.
- D. The port field of the transport layer header.
Answer: D
NEW QUESTION # 71
What causes an adjacency to change from "Init" to "Two Way"?
- A. When OSPF neighbors exchange Database Descriptor packets
- B. When a Link State Acknowledgement is received in response to a Link State Update
- C. When a router receives a Hello packet from a neighbor that contains its router id in the neighbor list
- D. When a Link State Update is received in response to a Link State Request
Answer: C
NEW QUESTION # 72
Which of the following LSA types stay within an OSPF area, and are not flooded outside of the area? Choose two answers.
- A. Summary router LSA
- B. Router LSA
- C. Network LSA
C Summary network LSA - D. Type 5 (AS external) LSAs
Answer: B,C
NEW QUESTION # 73
What are the three databases maintained by a Link State Protocol?
- A. Topology, routing, forwarding
- B. Neighbor, topology, forwarding
- C. Neighbor, adjacency, route table
- D. There are only two databases: adjacency and topology
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (Link State Protocol Architecture):
Link state protocols (OSPF, IS-IS) maintain:
Neighbor (adjacency) database # tracks neighbors and adjacencies
Topology (Link State) database # entire area topology
Routing (Forwarding Information Base) derived from SPF calculations
Thus, correct answer is B.
NEW QUESTION # 74
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 R5
- B. With a Router LSA originated by R4
- C. With an Inter-Area Prefix LSA originated by R5
- D. With an Inter-Area Prefix LSA originated by R1
- E. With an Inter-Area Prefix LSA originated by R4
- F. With a Router LSA originated by R1
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPFv3 LSA Types):
OSPFv3 uses Inter-Area Prefix LSAs (Type 3) to advertise prefixes between areas.
R4 originates a Router LSA with its local prefixes into Area 0.
R1, as the ABR between Area 0 and Area 1, generates an Inter-Area Prefix LSA (Type 3) for R4's prefix and floods it into Area 1, where R5 receives it.
Thus, correct answer: D.
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NEW QUESTION # 75
In an OSPF Hello packet what fields must match all neighbor routers on the segment? (Choose 3)
- A. Stub flag
- B. The list of neighbors
- C. DR and BDR addresses
- D. Area ID
- E. Hello and Dead Intervals
Answer: A,D,E
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Hello Packet Processing):
"For adjacency formation, the following fields must match: Area ID, Hello Interval, Dead Interval, and Options (which includes the Stub flag)." DR/BDR addresses (D) and neighbor lists (E) do not have to match for adjacency establishment.
Thus, correct answers are A, B, C.
NEW QUESTION # 76
What command will show the OSPF neighbors, and their status on the Nokia 7750 SR?
- A. Show router ospf adjacency
- B. Show ospf neighbors
- C. Show ospf adjacency
- D. Show router ospf neighbors
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Neighbor Monitoring):
The correct command syntax on the Nokia 7750 SR is:
show router ospf neighbor
This displays neighbor state, router ID, interface, priority, and adjacency status.
Thus, correct answer: B.
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NEW QUESTION # 77
Click the exhibit button.
What is the command to configure a static route on the Nokia 7750 SR router R1 to reach the network behind router R2?
- A. configure router static-route 139.120.121.0/24 next-hop 138.120.199.1
- B. configure router static-route 139.120.121.0/24 next-hop 138.120.199.2
- C. configure router static-route 138.120.199.2/24 next-hop 138.120.199.1
- D. configure router static-route 139.120.121.0/24 next-hop 139.120.121.2
Answer: B
Explanation:
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Comprehensive and Detailed Explanation From Exact Extract:
According to Nokia 7750 SR OS Routing Protocols Guide (Static Routing section, Chapter 5: Configuring Static Routes):
"A static route is configured by specifying the destination prefix and the next-hop IP address. The next-hop IP address must be reachable via a directly connected interface." In this scenario:
The network R1 wants to reach is 139.120.121.0/24 (behind R2).
R1 can reach R2 directly via IP 138.120.199.2 (the next-hop).
Therefore, the correct static route configuration on R1 is:
configure router static-route 139.120.121.0/24 next-hop 138.120.199.2
Explanation of incorrect options:
Option B: Next-hop 138.120.199.1 is R1 itself, invalid.
Option C: Configures a route to R2's interface, not the target subnet.
Option D: Next-hop 139.120.121.2 is unreachable from R1 directly.
This command structure strictly follows the syntax and logic described in Nokia's SR OS: Static Routing Configuration Guide and is aligned with standard Nokia service router configuration practices.
NEW QUESTION # 78
Which of the following statements best describes an OSPF type 3 LSA?
- A. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR only when route summarization is configured.
- B. An OSPF type 3 LSA is an inter-area LSA, generated by an ASBR to describe external routes.
- C. An OSPF type 3 LSA is an intra-area LSA, generated by the ABR only when route summarization is configured.
- D. An OSPF type 3 LSA is an inter-area LSA, generated by the ABR to describe a route to neighbors outside the area.
Answer: D
NEW QUESTION # 79
Click the exhibit button.
What can you deduce from the show command on router R6?
- A. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment; however, this command does not indicate whether 10.10.10.3 or 10.10.10.5 is the DR or BDR.
- B. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment.The DR for this segment would be the router with router ID 10.10.10.3.
- C. The router R6 interface is in a multi-access segment. It is the BDR, which is why it is not adjacent to the other routers.
- D. The router R6 interface is in a multi-access segment. It is neither the DR nor the BDR for the segment.
The DR for this segment would be the router with router ID 10.10.10.5.
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
According to Nokia 7750 SR OS Routing Protocols Guide (OSPF Neighbor States and DR Election):
"A router with multiple neighbors in 2-Way state on a multi-access segment indicates that it is neither DR nor BDR. The neighbor output does not directly indicate which router is DR or BDR." In the exhibit, R6 sees neighbors 10.10.10.2 in 2-Way state and 10.10.10.3, 10.10.10.5 in Full state.
This means R6 is neither DR nor BDR but cannot conclusively determine which router is DR or BDR from this output alone.
Therefore, correct answer is B.
NEW QUESTION # 80
Which of the following are similarities between OSPF and IS-IS? Choose two answers.
- A. Slow convergence after link failures.
- B. Link state updates sent using layer 3 multicast.
- C. Support hierarchy through the use of areas.
- D. Support for CIDR.
- E. Metric is based on hop count.
Answer: C,D
NEW QUESTION # 81
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Nokia 4A0-113 exam is intended for network professionals who work with Nokia Service Router platforms and need to have a deep understanding of OSPF routing protocol. This includes network engineers, network administrators, and network architects. By passing 4A0-113 exam, candidates can demonstrate their expertise in OSPF routing and validate their skills in configuring and troubleshooting OSPF networks on Nokia Service Router platforms.
4A0-113 2026 Training With 106 QA's: https://vceplus.actualtestsquiz.com/4A0-113-test-torrent.html
