Preparing for the Nokia IS-IS Routing Protocol 4A0-112 Exam? PassQuestion provides the latest 4A0-112 Nokia IS-IS Routing Protocol Exam Questions to help you succeed. These practice questions are designed to simulate real exam scenarios, covering essential topics such as IS-IS routing protocol, route redistribution, equal-cost multipath (ECMP) routing, bidirectional forwarding detection (BFD), and IP fast re-route (LFA) paths. With a focus on IPv4 and IPv6 configuration, PassQuestion 4A0-112 Nokia IS-IS Routing Protocol Exam Questions ensure you gain hands-on knowledge using the model-driven command-line interface (MD-CLI). Whether you're a networking professional or an aspiring Nokia expert, these questions will boost your confidence and help you ace the exam.

What is the Nokia IS-IS Routing Protocol Exam?

The Nokia IS-IS Routing Protocol Exam (4A0-112) is designed to test candidates' knowledge and expertise in static and IS-IS routing protocols. The exam focuses on route redistribution, filtering, ECMP routing, BFD, and fast re-routing techniques using LFA paths. It ensures candidates can configure IPv4 and IPv6 routing efficiently using the Nokia Service Router Operating System (SR OS) MD-CLI.

Prerequisites for the 4A0-112 Exam

Before attempting the Nokia IS-IS Routing Protocol 4A0-112 exam, it is recommended to have:

• Basic knowledge of Ethernet and IP routing
• Familiarity with the model-driven CLI (MD-CLI) of the Nokia Service Router Operating System (SR OS)

While there are no mandatory prerequisites, candidates with hands-on networking experience will have a better chance of passing the exam.

Nokia 4A0-112 Exam Details

Nokia 4A0-112 Exam Modules and Topics Covered

Module 1 – IP routing review

• Introduction to IP routing
• Populating the routing table
• Equal-Cost Multipath Routing (ECMP)
• Route redistribution and route filtering using policies
• The Nokia 7750 SR architecture
• The IP packet header format
• IP addressing
• Layer-3 interfaces on a Nokia 7750 SR

Module 2 – Static routes

• Characteristics of static routes
• Failure detection options
• IPv6 static routes

Module 3 – Interior gateway protocols

• Interior gateway protocol overview
• Distance vector protocols
• Link-state protocols
• The shortest path first algorithm
• Link-state protocol message flooding
• Link-state protocol optimizations

Module 4 – Intermediate system-to-intermediate system routing protocol (IS-IS)

• IS-IS basics
• Hierarchy in a multi-area IS-IS domain
• IS-IS message types
• IS-IS adjacency and database synchronization
• Advertising link-state information in a single-area IS-IS network
• Advertising link-state information in a multi-area IS-IS network
• IS-IS route leaking
• IS-IS route summarization
• Advertising external prefixes into IS-IS
• Loop-Free Alternate (LFA) paths and IP fast reroute
• IS-IS for IPv6

Why Take the Nokia 4A0-112 Exam?

Achieving certification in Nokia IS-IS Routing Protocol (4A0-112) provides numerous benefits, including: ✔ Enhanced career opportunities in network engineering
✔ Proficiency in IS-IS routing protocol, essential for large-scale network operations
✔ Validation of your networking skills, increasing credibility in the industry
✔ Expertise in IPv4 and IPv6 configurations using Nokia’s advanced networking solutions

If you are aiming for the Nokia Service Routing Certification (SRC) Program, this exam is a valuable step toward mastering IP/MPLS networks.

Best Preparation Tips for 4A0-112 Nokia IS-IS Routing Protocol Exam

To pass the 4A0-112 exam, follow these preparation strategies:
✅ 1. Use PassQuestion’s Latest 4A0-112 Exam Questions
PassQuestion provides updated practice tests that mirror the real exam format. These questions help you identify weak areas and improve your problem-solving speed.

✅ 2. Study the Official Nokia Learning Materials
Review the Nokia IS-IS Routing Protocol course material and lab exercises to understand real-world networking applications.

✅ 3. Gain Hands-on Practice with Nokia SR OS
Practice configuring IS-IS, ECMP, and BFD using the model-driven CLI (MD-CLI). Nokia’s virtual lab environments can help you solidify your knowledge.

✅ 4. Join Networking Forums and Study Groups
Engaging in online forums, such as Nokia’s Learning Community, allows you to share insights and learn from experienced professionals.

✅ 5. Take Mock Exams
Simulated exams will help you get comfortable with timed tests and evaluate your readiness.

View Online Nokia IS-IS Routing Protocol 4A0-112 Free Questions

1. A series of actions are triggered on a router as a result of enabling both loopfree-alternate for a link-state routing protocol and ip-fast-reroute. Which of the following is NOT one of those actions?
A. Calculating the shortest-path next hop for each known IP prefix.
B. Calculating a backup next hop for each known IP prefix, if it exists, that would not create a routing loop if used without informing other routers.
C. Installing two entries in the FIB for IP prefixes, one active and one in standby mode.
D. Enabling the router to locally repair the active path to an IP prefix in case of failure.
Answer: A

2. When using IS-IS in native mode for routing in a dual-stack IPv4/IPv6 environment, which of the following statements is FALSE?
A. All links are assumed to be IPv4- and IPv6-capable.
B. The same topology information is used to calculate the shortest path tree for both IPv4 and IPv6.
C. In a multi-area environment, the SPF algorithm needs to be run four times on each L1/L2 router.
D. It may lead to traffic black-holing if not properly designed.
Answer: C

3. A new router is added to a broadcast network. What does IS-IS use as the tiebreaker for selecting the DIS if the priorities are the same?
A. The router with the highest system ID.
B. The Hello packet with the highest sequence number.
C. The existing DIS remains the DIS.
D. The router with the highest interface MAC address.
Answer: A

4. There are several differences between IS-IS Hello packets used on broadcast interfaces and on point-to-point interfaces.
Which of the following statements is FALSE?
A. On broadcast interfaces there are different Hello packet types for level-1 and level-2 adjacencies, whereas on point-to-point interfaces there is a single Hello packet type.
B. The multicast MAC addresses to which the Hello messages are sent are different on broadcast interfaces and on point-to-point interfaces.
C. The neighbors are identified using their interface MAC addresses on broadcast Hello messages and using their system IDs on point-to-point Hello messages.
D. Broadcast Hello messages identify the elected designed IS (DIS) and point-to-point Hello messages do not.
Answer: C

5. Which component of the Nokia 7750 SR is in charge of performing the longest prefix match lookup on packets that arrive on the physical interfaces?
A. Control Processing Module (CMP)
B. Media Dependent Adapter (MDA)
C. Switch Fabric (SF)
D. Input/Output Module (IOM)
Answer: D

6. What is the replacement for ARP in IPv6?
A. Duplicate address detection procedures.
B. Router discovery procedures.
C. Neighbor discovery procedures.
D. Stateless address auto-configuration procedures.
Answer: C

7. A routing domain is using a single-area link-state routing protocol. Which of the following is NOT information that a router can share with other routers in the domain using protocol-specific
messages?
A. The IP prefixes of subnets directly attached to the router.
B. IP prefixes known by the router because it is running ad additional routing protocol.
C. The local router ID and the router IDs of neighboring routers.
D. A copy of the local routing table.
Answer: D

8. On a broadcast interface, an IS-IS router receives an LSP that is newer than the one on its database. Which of the following statements best describes the actions taken by the router as a
consequence?
A. The router updates its database with the LSP and acknowledges it with a PSNP.
B. The router updated its database with the LSP, acknowledges the LSP with a PSNP, and floods a copy to its neighbors on other interfaces.
C. The router updates its database with the LSP and floods a copy to its neighbors on other interfaces.
D. The router sends back a copy of the LSP from its database to its neighbor.
Answer: B

9. When a router performs the SPF calculation, which router is used as the root of the shortest path tree?
A. The router's closest neighbor.
B. The router doing the calculation.
C. The router with the lowest router ID.
D. The router with the fewest links.
Answer: B

10. What do the address resolution protocol (ARP) for IPv4 and the neighbor discovery procedures for IPv6 have in common?
A. Both detect duplicate MAC address assignments.
B. Both detect duplicate IP address assignments.
C. Both resolve a host device's MAC address using its IP address.
D. Both resolve a host device's IP address using its MAC address.
Answer: C