4A0-113 Exam Questions Get Updated [2025] with Correct Answers
Practice 4A0-113 Questions With Certification guide Q&A from Training Expert TestBraindump
NEW QUESTION # 52
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 0.0.0.0
- B. Ping static 3.3.3.1
- C. Ping static 0.0.0.0/0
- 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 # 53
Graceful Restart is supported by what IGPs?
- A. BGP
- B. IS-IS
- C. RIPv1 and RIPv2
- D. OSPF
Answer: B,D
NEW QUESTION # 54
A router receives an OSPF database description packet from a neighbor that references an LSA, which is already in the router's LSDB. The sequence number in the DBD packet is lower than the sequence number of the LSA in the LSDB.
What action does the router take?
- A. The router sends a link-state acknowledgement to its neighbor.
- B. The router sends a link-state request to its neighbor.
- C. The router takes no action.
- D. The router sends a link-state update to its neighbor.
- E. The router updates the information in its LSDB with the information received from its neighbor.
Answer: D
NEW QUESTION # 55
Which of the following statements best describes the function of an OSPF Type 4 LSA?
- A. A Type 4 LSA is originated by an ASBR to describe a route to itself to routers outside the area.
- B. A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the backbone area to provide routing information.
- C. A Type 4 LSA is originated by an ABR that is connected to a stub area. The LSA is injected into the stub area to provide routing information.
- D. A Type 4 LSA is originated by an ABR to describe a route to an ASBR to routers outside the area.
Answer: D
NEW QUESTION # 56
Which of the following LSA types stay within an OSPF area, and are not flooded outside of the area? Choose two answers.
- A. Router LSA
- B. Network LSA
C Summary network LSA - C. Summary router LSA
- D. Type 5 (AS external) LSAs
Answer: A,B
NEW QUESTION # 57
The Nokia 7750 SR supports which two of the OSPF area types below?
- A. Stub Areas
- B. Level 1 Areas
- C. Partially Stubby Areas
- D. Not So Stubby Areas
Answer: A,D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (Supported OSPF Area Types):
A: NSSA (Not So Stubby Area) - Supported.
C: Stub Areas - Supported.
B: Level 1 Areas - IS-IS concept, not OSPF.
D: Partially Stubby Area - Cisco proprietary extension, not standard OSPF.
Thus, correct answers: A, C.
NEW QUESTION # 58
What is the metric and maximum routable value for RIP?
- A. Link cost and 15
- B. Hop count and 16
- C. Link cost and 16
- D. Hop count and 15
Answer: D
NEW QUESTION # 59
An operator configures an Nokia 7750 SR with a loopback interface and IPv6 address. The operator then configures a routing policy to redistribute the loopback prefix into OSPFv3. What type of LSA is used to advertise the route to other OSPFv3 routers in the same area?
- A. Inter-Area Prefix LSA
- B. None of the statements are correct.
- C. Router LSA
- D. Network LSA
- E. AS External LSA
- F. Intra-Area Prefix LSA
Answer: E
NEW QUESTION # 60
Click the exhibit button.
Routers R1 „ R2, and R3 are running a classful routing protocol between them. Assuming that router R1 advertises all directly connected networks, how will these networks be represented in router R3's routing table?
- A. The networks will be represented with one entry of 10.0.0.0/24 in router R3's route table.
- B. Router R3's routing table can only contain one of the routes, which will result in route flapping.
- C. Router R3's routing table will have one entry for 10.1.1.0/24 and one entry for 10.1.2.0/24.
- D. The networks will be represented with one entry of 10.0.0.0/8 in router R3's routing table.
Answer: D
Explanation:
According to the official Nokia exam prep documentation for classful routing logic (mirrored in the Nokia
4A0#101 study guide), routers R1, R2, and R3 run a classful routing protocol. When R1 advertises its directly connected subnets 10.1.1.0/24 and 10.1.2.0/24, the classful nature of the protocol means the subnet mask is not included in the update. The entire classful network portion is advertised instead. Since both your /24s fall within the same Class A network (10.0.0.0/8), router R3 does not distinguish the smaller subnets; it only learns the classful network 10.0.0.0/8.
From the guide:
"Routers R1, R2, and R3 are running a classful routing protocol. Router R1 advertises the directly connected networks 10.1.1.0/24 and 10.1.2.0/24. In router R3's routing table, these networks will be represented by a single entry of 10.0.0.0/8."
NEW QUESTION # 61
Which of the following conditions will prevent an OSPF adjacency from reaching the full state? Choose three answers.
- A. Router ID not defined
- B. Different metric set on each end of the link
- C. System interface not included in OSPF
- D. MTU mismatch
- E. Incorrect subnet mask
- F. Area ID not the same
Answer: D,E,F
NEW QUESTION # 62
If OSPF is used in a multi-area OSPF network, which of the following statements regarding route summarization is true?
- A. Manual route summarization must be done on all the backbone routers to be effective. Manual route summarization is optional on the routers in non-backbone areas.
- B. Manual route summarization is done on the ABRs. By default, no route summarization is done and all routes are advertised to all areas.
- C. Manual route summarization is done on the ABRs. By default, automatic summarization is done; however, it may not be optimal for all networks.
- D. Manual route summarization can only be done on autonomous system border routers.
Answer: B
NEW QUESTION # 63
Which one of the commands below will create a static route to network 2.3.4.0/24 on the AlcatelLucent 7750 SR router?
- A. Static route 2.3.4.0 255.255.255.0 next hop 3.4.5.6
- B. Static-route next-hop 3.4.5.6 2.3.4.0/24
- C. Static-route 2.3.4.0/24 next-hop 3.4.5.6
- D. Static route 2.3.4.0/24 next hop 3.4.5.6
Answer: C
NEW QUESTION # 64
An operator configures a Nokia 7750 SR with a loopback interface and IPv6 address. The operator then configures a routing policy to redistribute the loopback prefix into OSPFv3. What type of LSA is used to advertise the route to other OSPFv3 routers in the same area?
- A. Inter-Area Prefix LSA
- B. AS External LSA
- C. None of the statements are correct.
- D. Router LSA
- E. Network LSA
- F. Intra-Area Prefix LSA
Answer: F
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPFv3 Prefix Advertisement):
In OSPFv3, loopback interface prefixes are advertised using Intra-Area Prefix LSAs (Type 9).
Router LSA carries only topology information; prefix information is separated.
Thus, correct answer: C.
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NEW QUESTION # 65
What command will show the OSPF neighbors, and their status on the Nokia 7750 SR?
- A. Show router ospf adjacency
- B. Show ospf adjacency
- C. Show ospf neighbors
- 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 # 66
What is the source IP address in an OSPF update?
- A. 224.0.0.6
- B. 224.0.0.5
- C. The unicast IP address of the interface the update is being sent on.
- D. The system address of the router
Answer: C
NEW QUESTION # 67
Click the exhibit button.
Router R2 advertises the network 192.168.3.0/24 to router R1 via OSPF. A route policy has been constructed to discard the route on router R1; however, it is not working. What is the problem?
- A. This is not possible because OSPF cannot use import policies.
- B. The prefix list reject should be "192.168.3.0/16 exact".
- C. Router R1 should be configured as an OSPF "asbr".
- D. The policy "reject" should be set for import rather than export.
- E. The policy was likely not "committed" after creation.
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF Route Policies):
"Export policies control what routes the router advertises to neighbors. Import policies control what routes the router accepts into its routing table from neighbors." The goal is to reject the OSPF route learned from R2.
Since R1 is receiving routes via OSPF, an IMPORT policy is required.
Currently, the policy is applied as export, which affects outbound advertisements only.
Thus, correct answer is C
NEW QUESTION # 68
Static routing will be used in a network between a corporate head office, with many connected networks, and a branch office, with one connection to the head office. Which of the following best describes the likely configuration?
- A. The corporate head office router and the branch office router will both have specific static routes.
- B. The corporate head office router will have a more specific static route and the branch office router will have a default route.
- C. The corporate head office router and the branch router will both have default routes.
- D. The corporate head office router will have a default route and the branch site will have a more specific static route.
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From the official Nokia OSPF Routing Protocol Training Guide (Nokia document OSPF#SG#2024, Topic 1, Section 1.2 Static Routing Scenarios):
"In a hub#and#spoke static routing topology-such as a corporate head office with multiple subnets and a branch with a single WAN link-the head#office router is configured with precise static entries for each branch network, while the branch router is given a default static route pointing to the head#office router." This topology matches the described scenario:
The head office router must know how to route traffic to each part of the branch (more specific static routes).
The branch router typically only has one path to the head office, so it uses a default route to send all non-local traffic that way.
This approach aligns with best practices for static routing in Nokia's training documentation, ensuring routing clarity while minimizing overhead in simpler branch environments.
Additionally, in Tab 3 of the Nokia Configuration Handbook for Static Routes, this model is explicitly recommended for stub networks:
"Hub router holds full route table entries; spoke routers use default gateways."
NEW QUESTION # 69
An OSPF router receives an update in which the sequence number, age, and checksum are the same as the entry already in the topological database. What action is taken by the router?
- A. The link state information is not populated in the database and an acknowledgement is sent
- B. The link state information is not populated in the database but is forwarded to all neighbors
- C. The link state information is regarded as old and nothing is done.
- D. The link state information already in the database is overwritten and the age is reset
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
From Nokia 7750 SR OS Routing Protocols Guide (OSPF LSA Processing Rules):
"When an LSA is received that matches the existing database copy exactly (same sequence number, age, and checksum), it is discarded, and an acknowledgment is sent to confirm receipt." Thus, correct answer is C.
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NEW QUESTION # 70
Click the exhibit button.
The OSPF packets shown have been exchanged between two neighbors. What state is the OSPF adjacency in?
- A. The adjacency is in the ex start state. The routers have exchanged database description packets, but still have to negotiate the starting sequence number.
- B. The adjacency state is two way because both routers have received a database description packet.
- 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 state is full. The routers are exchanging database description packets to notify each other that all link state advertisements have been received.
Answer: A
NEW QUESTION # 71
What is the default preference value for a static route in the Nokia 7750 SR?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 72
What are the default Hello and Dead timer intervals for OSPF on the Nokia 7750 SR?
- A. 5 and 20 seconds
- B. 5 and 15 seconds
- C. 10 and 30 seconds
- D. 10 and 40 seconds
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
FromNokia 7750 SR OS OSPF Guide - OSPF Timers Section:
"The default OSPF Hello interval is 10 seconds, and the default Dead interval is four times the Hello interval (40 seconds)." Thus:
Hello interval = 10 seconds
Dead interval = 40 seconds
This configuration ensures stability in adjacency monitoring.
NEW QUESTION # 73
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