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Exam Code: 4A0-255

Exam Name: Nokia Advanced Optical Network Design

Updated: Aug 03, 2026

Number: 40 Q&As with Testing Engine

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Nokia 4A0-255 Exam Syllabus Topics:

Topic	Details
Topic 1	Define low Automatic Spontaneous Emission (ASE) OTs segregation Find alternative routes with better OSNR
Topic 2	How to determine the number of network elements and their location Design a network with no ASE noise OTs segregation
Topic 3	Describe the concept of trail grooming Design a network accounting for medium to long-term growth
Topic 4	Describe the advantages of Forward Error Correction (FEC) Configure grooming optimizing the equipment slot allocation
Topic 5	Analyze nominal and restoration routes in EPT Design networks with control plane enabled
Topic 6	Design a CDC-F network with GMPLS enabled Describe the GMPLS (L0, L1 and MRN) control plane
Topic 7	Explain advanced customer requirements (resilience, latency, encryption, synchronization) Describe advanced EPT design options (including CDC, GMPLS, flexible grid, C+L, etc.)
Topic 8	Explain the concept of Probabilistic Constellation Shaping (PCS) Explain the advantages of DGE nodes in long-haul designs
Topic 9	Define NE hardware manually to optimize cost Describe CDC-F 2.0 hardware with Integrated ROADMs (iROADMs)
Topic 10	Describe SRG and “failure scope” configuration Design networks with control plane enabled

Reference: https://www.nokia.com/networks/training/onc/exams/advanced-optical-network-design/

Nokia 4A0-255 Exam Overview:

Certification Vendor:	Nokia
Exam Name:	Nokia Advanced Optical Network Design
Exam Number:	4A0-255
Exam Format:	Multiple Choice
Exam Price:	$125 USD
Available Languages:	English
Related Certifications:	Nokia Optical Network Design Expert Certification
Exam Duration:	90 minutes
Recommended Training:	Nokia Optical Network Certification (ONC) Training Portal Nokia Advanced Optical Network Design Course
Exam Registration:	Official Nokia Advanced Optical Network Design Exam Page
Sample Questions:	Nokia 4A0-255 Sample Questions
Exam Way:	Online or onsite proctored exam
Pre Condition:	Recommended: Nokia Optical Networking Fundamentals (4A0-205 / 4A0-250 equivalent knowledge) or experience in optical transmission and WDM network design
Official Syllabus URL:	https://www.nokia.com/networks/training/onc/exams/advanced-optical-network-design/

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