4A0‑112

Nokia IS-IS Routing Protocol

About the Certification

This is a specialized certification from Nokia in the field of Interior Routing Protocols, fully focused on the IS-IS routing protocol, which is widely used in Service Provider networks and Core / Backbone networks. It is considered an advanced-level certification within the Nokia Routing track and aims to build deep expertise in designing, configuring, operating, and troubleshooting IS-IS in ISP environments using Nokia SR OS. The certification prepares engineers to work on Core and Backbone networks and is ideal for professionals seeking advanced specialization in interior routing protocols.

Main Curriculum

The curriculum is divided into eight main sections:

  • IS-IS Fundamentals and Architecture
    • IS-IS concepts and its role as an IGP
    • Comparison between IS-IS and OSPF
    • OSI model and CLNS fundamentals
    • IS-IS usage in Service Provider networks
  • IS-IS Levels and Area Design
    • Level-1, Level-2, and Level-1-2 routers
    • Area design concepts
    • Hierarchical network design
    • Best practices for network segmentation
  • IS-IS Operations, Monitoring, and Troubleshooting
    • IS-IS verification commands
    • Adjacency troubleshooting
    • LSP database troubleshooting
    • Operational best practices
  • Advanced IS-IS Features and Extensions
    • IS-IS for IPv6
    • Multi-Topology IS-IS
    • Route leaking and redistribution
    • Fast Reroute (FRR) concepts
  • IS-IS Configuration on Nokia SR OS
    • Basic IS-IS configuration
    • System and interface configuration
    • Authentication configuration
    • Route import and export policies
  • IS-IS Packet Types and Adjacencies
    • Hello packets (IIH)
    • LSPs, CSNPs, and PSNPs
    • Neighbor discovery
    • Adjacency states and timers
  • IS-IS with MPLS and Segment Routing
    • IS-IS as the IGP for MPLS networks
    • IS-IS integration with LDP
    • IS-IS for Segment Routing (SR-MPLS)
    • Prefix-SID and Adjacency-SID concepts
  • Metrics and Path Selection in IS-IS
    • Default and wide metrics
    • SPF calculation
    • Path selection logic
    • Equal-Cost Multi-Path (ECMP) routing

Exam Details :

  • Exam code: 4A0-112
  • Exam duration: 90 minutes
  • Number of questions: 40–60 questions
  • Question types: Multiple-choice questions + Core / Backbone scenarios + Advanced technical questions
  • Language: English
  • Passing score: Approximately 60%–65%
  • Exam fee: USD 200–300 (may vary by country and may include taxes)
  • Certification validity: Subject to updates within the Nokia Learning track

Do I need certifications before it ?

No, not required.

However, it is strongly recommended to have Nokia NRS I (4A0-100) or Interior Routing Protocols (4A0-101) certification, or solid experience in: IP Routing – OSPF / IS-IS fundamentals – Service Provider networks

Which certifications are recommended after this one ?

Not mandatory.
However, for professionals seeking a strong specialization path in IS-IS routing using Nokia equipment, especially in network design, routing table management, and network stability, the Nokia IS-IS Routing Protocol certification track is the strongest option.

What are the main uses of the Nokia IS-IS Routing Protocol certification ?

  • Nokia NRS II – Deeper focus on advanced routing and ISP technologies
  • Nokia Service Routing Architect (SRA) – Professional path for advanced Core network design and operations
  • Nokia MPLS & VPN Certifications – Specialization in MPLS and L2/L3 VPNs
  • Advanced BGP Certifications – Working on Backbone and Internet routing
  • Juniper JNCIS / JNCIP-SP – Expanding routing expertise in multi-vendor Service Provider environments
  • Cisco CCNP Service Provider or Enterprise – Bridging advanced routing concepts across different vendors

An Advanced Step Toward Routing Mastery :

The Nokia IS-IS Routing Protocol (4A0-112) certification is a highly advanced step for engineers aiming to work in Core Networks. It provides full control over one of the most critical routing protocols in Service Provider environments and opens strong career opportunities in global telecom operators and ISPs.

Who is this certification suitable for ?

  • Network engineers working in or targeting Service Provider networks
  • Professionals holding NRS I / NRS II or possessing solid routing experience
  • Engineers specializing in IS-IS within ISP environments
  • NOC staff or Core Network Engineers
  • Telecommunications graduates seeking deep expertise in advanced routing protocols

In Short :

The deep specialization certification for mastering IS-IS within Service Provider networks using Nokia technologies.

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