4A0-101 and related practice examsIn development
Nokia Network Routing Specialist II
Carrier-grade routing and services on Nokia SR OS: the layered provider model of an interior protocol carrying only infrastructure and loopbacks, BGP carrying internet and customer routes at scale through route reflectors with inbound filtering as hygiene, and MPLS forwarding on labels so the core carries traffic it has no IP route for; then the explicit Nokia service model where a service binds a SAP to an SDP tunnel, VPRN as the Layer 3 VPN with route distinguishers and route targets, VLL point-to-point and VPLS multipoint Layer 2 services, and operations with QoS and diagnosis along the service structure.
What you get
Papers are cut from the bank and weighted like the real exam, and no question appears in two of them. Every wrong answer comes back on later days until you have it right.
What the exam covers
| IS-IS, OSPF, BGP and MPLS | Not published |
| VPRN, VPLS, VLL and services | Not published |
Two sample questions
1. What is a transit leak?
- Accepting more prefixes than a session's limit
- Advertising a prefix the network does not own
- Readvertising one provider's routes to another — correct
- Losing routes when a reflector is lost
Why: It turns a customer into an unintended transit path, which outbound filtering is meant to prevent.
2. What does IS-IS share with OSPF?
- It is a link-state IGP — correct
- It is distance-vector
- It carries the internet table
- It distributes labels
Why: IS-IS, like OSPF, is a link-state interior gateway protocol.
The real 4A0-101 and related exam
| Length | 90 minutes |
|---|---|
| Questions | Around 60 |
| Pass mark | Scaled; Nokia does not publish the percentage |
| Price | Set by Nokia; taken through the Nokia SRA programme |
| Recommended before you sit it | The NRS I is required before the NRS II. |
| Valid for | Aligned to the Nokia certification programme |
Exam facts as published by Nokia; always check the vendor’s page before you book.
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