Before purchasing anything, download the free 4A0-112 practice test and judge it yourself. The demo costs nothing, is available at any time, and in 2026 your decision about the Nokia IS-IS Routing Protocol materials at Lead2Passed should rest on evidence rather than promises.
Nokia 4A0-112 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Metric and Route Calculation | - IS-IS metric types and cost calculation - Route preference and selection behavior |
| Topic 2: IS-IS Routing Levels | - Inter-area routing and route leaking concepts - Level 1 and Level 2 routing concepts |
| Topic 3: Advanced IS-IS Features | - Authentication and security mechanisms - IPv4 and IPv6 support (multi-topology IS-IS) |
| Topic 4: IS-IS Fundamentals | - IS-IS protocol overview and architecture - OSI protocol stack and CLNS concepts |
| Topic 5: Link-State Database and LSP Processing | - LSP generation and flooding - SPF calculation and shortest path selection |
| Topic 6: IS-IS Adjacency and Neighbor Discovery | - Hello (IIH) packet formation and processing - Adjacency states and establishment rules |
| Topic 7: Troubleshooting and Operations | - Protocol verification and debugging tools - Common IS-IS failures and diagnostics |
The Nokia IS-IS Routing Protocol Exam: What to Know First
Currency is maintained daily, not occasionally. Our IT staff reviews and updates the Nokia IS-IS Routing Protocol question bank every day to keep it aligned with the live 4A0-112 exam. If a revision is underway when you buy or during your update period, we notify you and send the updated version as soon as it is ready — free within your 365 days of updates. You will never be left studying a stale edition without knowing it.
The 4A0-112 exam is the official assessment behind the Nokia IS-IS Routing Protocol certification from Nokia, and its pass rate is genuinely low — many candidates need two or three attempts to get through. The difficulty is real, but it is also manageable: candidates who prepare with material aligned to the published objectives give themselves a far better starting position than those who walk in underprepared.
Registration for the 4A0-112 exam runs through these official channels:
Given how commonly this exam takes more than one attempt, schedule your sitting only when your practice results say you are ready.
The official outline divides the 4A0-112 exam into weighted domains, including:
- Link-State Database and LSP Processing ()
- Advanced IS-IS Features ()
- IS-IS Routing Levels ()
The Nokia IS-IS Routing Protocol question bank at Lead2Passed is updated daily against these same objectives, and the free practice test lets you sample that alignment yourself.
Nokia recommends these training resources for candidates:
Official training builds the foundation; a daily-reviewed practice bank with expert-verified answers builds the exam-day readiness. Use both.
Only while you want us to. Update notifications about the Nokia IS-IS Routing Protocol materials are sent because they are useful; once you have passed the 4A0-112 exam, one email to our team opts you out completely — no junk mail, ever. Your personal information is kept secret and safe throughout, and never shared with third parties.
Passing the 4A0-112 exam requires Not publicly disclosed, and registration costs Varies by region and testing provider (typically USD-based Pearson VUE pricing) — per attempt. With retakes so common on this exam, preparing properly for one focused attempt is the choice that protects your budget.
The 4A0-112 exam contains Not publicly disclosed questions with Not publicly disclosed (commonly 60–90 minutes in Nokia SRC exams) minutes to complete them. Practicing under the same time limit is the reliable way to make exam-day pacing feel familiar rather than frantic.
Basic understanding of IP routing and networking fundamentals is recommended; prior Nokia Service Routing knowledge is helpful but not strictly required.
Nokia IS-IS Routing Protocol Sample Questions:
Which of the following definitions best describes route redistribution?
- A. It is the process of redirecting packets to be processed by an intermediate network function before allowing them to be forwarded to their intended final destination.
- B. It is the process of controlling which route advertisements received from routing peers are accepted and/or deciding which locally known prefixes are advertised to routing peers.
- C. It is the process of deciding at line-rate speed which packets will be dropped and which ones will be forwarded.
- D. It is the process of passing routing information from one routing domain to another, which usually means from one routing protocol to another.
Correct Answer: D 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
For a link-state routing protocol, which of the following statements about link-state updates is FALSE?
- A. Aging helps ensure that routers that are no longer part of the topology will eventually get removed from the link-state database.
- B. When a link-state update reaches its maximum age on a router, the router will flood that update to its neighbors.
- C. The age value is updated as the link-state update is flooded throughout the network and when it is in the link-state database
- D. When a router detects that a link-state update has reached its maximum age, it will request a new update from the source router.
Correct Answer: B 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Refer to the exhibit.
Routers R1 through R4 are running an IGP in such a way that they have each other's system IP addresses in their routing tables. A static route is configured on router R1 so that it can reach subnetwork 10.4.100.0/24. The network administrator decides to use an indirect static route, as shown in the diagram. However, pinging the server from router R1 fails. What may be the problem in this case?
- A. Router R1 drops the echo request because address 10.10.10.3 does not belong to an adjacent router.
- B. The echo request arrives at the server but there is no path for the echo response to return to router R1.
- C. Router R3 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
- D. Router R2 drops the echo request because it does not have subnet 10.4.100.0/24 in its routing table.
Correct Answer: B 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Which of the following is NOT a function of the control plane a router?
- A. To exchange signaling messages with other routers.
- B. To utilize the forwarding tables to forward data packets towards their destination.
- C. To determine the best way to forward packets.
- D. To establish routing paths to deliver packets from source to destination and to reestablish them in case of failure.
Correct Answer: B 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
Which of the following statements about router interfaces on a Nokia 7750 SR is FALSE?
- A. They can be logical or physical.
- B. They can be assigned IPv4 and/or IPv6 addresses.
- C. They can be used in pairs on the same subnet for redundancy.
- D. The system interface exists by default.
Correct Answer: C 🗳️
Explanation: Only visible for Lead2Passed members. You can sign-up / login (it's free).
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