4A0-C03 Exam Guide
This 4A0-C03 exam focuses on practical knowledge and exam application scenarios related to the subject area. It evaluates your ability to understand core concepts, apply best practices, and make informed decisions in realistic situations rather than relying solely on memorization.
This page provides a structured exam guide, including exam focus areas, skills measured, preparation recommendations, and practice questions with explanations to support effective learning.
Exam Overview
The 4A0-C03 exam typically emphasizes how concepts are used in professional environments, testing both theoretical understanding and practical problem-solving skills.
Skills Measured
- Understanding of core concepts and terminology
- Ability to apply knowledge to practical scenarios
- Analysis and evaluation of solution options
- Identification of best practices and common use cases
Preparation Tips
Successful candidates combine conceptual understanding with hands-on practice. Reviewing measured skills and working through scenario-based questions is strongly recommended.
Practice Questions for 4A0-C03 Exam
The following practice questions are designed to reinforce key 4A0-C03 exam concepts and reflect common scenario-based decision points tested in the certification.
Question#1
In a VPLS, when a PE router receives a frame from a CE device on a Service Access Point (SAP), what does it do with the source MAC address?
A. It ignores the MAC and forwards the frame purely based on the destination IP address.
B. It populates its local Forwarding Information Base (FIB), associating the MAC with that SA
C. It explicitly advertises the MAC address to all other PE routers using MP-BGP updates.
D. It strips the Ethernet header and replaces it with the provider's MAC address.
Explanation:
Standard VPLS relies on data-plane MAC learning (exactly like a standard Ethernet switch). When a frame arrives on a SAP, the PE inspects the source MAC and adds it to the VPLS FIB (FDB), mapping that MAC to the specific SAP it arrived on.
Question#3
You need to quickly verify the OSPF neighbor states on a Nokia 7750 SR. Which CLI command directly provides this specific output?
A. show router ospf adjacency
B. show router ospf neighbor
C. show ospf peering-status
D. display ospf peer
Explanation:
The correct SR OS syntax to verify OSPF neighbor relationships is show router ospf neighbor .
Question#4
When configuring IS-IS for Traffic Engineering (RSVP-TE) or IPv6 routing on a Nokia SR OS router, what is a mandatory protocol requirement?
A. Wide metrics must be enabled.
B. OSPFv3 must be redistributed into the IS-IS instance.
C. The router must operate strictly as a Level 2 only router.
D. The IS-IS designated router (DIS) priority must be set to 0.
Explanation:
Traffic Engineering (TE) and Multi-Topology (IPv6) require the exchange of extended information. The original IS-IS Narrow metrics do not have the TLV capacity for this. Therefore, generating and accepting Wide metrics is mandatory.
Question#5
When configuring an RSVP-TE LSP with CSPF (Constrained Shortest Path First) enabled, which of the following constraints CANNOT be natively evaluated by the CSPF algorithm?
A. Administrative groups (Color/Affinities)
B. Hop count limits
C. Available link bandwidth
D. LDP synchronization state
Explanation:
CSPF dynamically calculates paths across the TE topology database based on metrics like Bandwidth, Admin Groups (Colors), Hop Limits, and TE metrics. LDP synchronization is a local IGP interaction and is not a constraint evaluated by the CSPF algorithm.
Disclaimer
This page is for educational and exam preparation reference only. It is not affiliated with Nokia, Nokia Network Routing Specialist II (NRS II), or the official exam provider. Candidates should refer to official documentation and training for authoritative information.
