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Nokia 4A0-D03 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: SR Linux and EVPN Fundamentals | 25% | - VXLAN encapsulation and underlay - EVPN control plane and MP-BGP - SR Linux architecture and CLI |
| Topic 2: Layer 3 EVPN Services | 25% | - EVPN Route Type 5 - VRF integration and route targets - Symmetric and asymmetric routing |
| Topic 3: Layer 2 EVPN Services | 25% | - Multi-homing and Ethernet Segments - Anycast Gateway and IRB - EVPN Route Types 1–4 |
| Topic 4: Data Center Interconnect (DCI) Solutions | 25% | - Interoperability with Nokia 7750 SR - Gateway-less EVPN DCI - BGP route policies and route reflectors |
Nokia SR Linux EVPN and Data Center Interconnect Sample Questions:
1. Which of the following statements about the decoupled gateway-based data center interconnect solution is FALSE?
A) The EVPN services in the data center are interconnected to different VPN services in the WAN.
B) The WAN PE maintains a peering session with the data center route-reflector for the exchange of updates.
C) The separation between the border leaf and the WAN PE provides a clear demarcation for security and QoS.
D) VLAN tags are used to identify traffic between the data center border leaf and the WAN PE.
2. Which of the following statements about MAC mobility is TRUE?
A) The original PE advertises the locally learned MAC with the sequence number set to a maximum value.
B) A PE advertising a local MAC that was previously learned through EVPN, will decrement the sequence number in its update.
C) The originating PE and the destination PE must synchronize their MAC tables.
D) The originating PE generates a withdraw message after the same locally learned MAC has aged out.
3. e-BGP is used as the routing protocol in the data center underlay.
When configuring the EVPN MP-BGP route reflector sessions, which of the following statements is FALSE?
A) The cluster-id that uniquely identifies the route reflector is only configured on the route reflector itself.
B) If redundant route reflectors are deployed, the client leaf routers will receive duplicated updates.
C) A second route reflector can be deployed for redundancy purposes.
D) The leaf's underlay autonomous system number is used for the route reflector EVPN peering sessions.
4. Which of the following statements about the gateway-less data center interconnect solution is FALSE?
A) It provides a clear demarcation for security between the border leaf and gateway.
B) All of the data centers leaf routers must be reachable over the WAN network.
C) The data center border leaf and gateway can use either eBGP or static routes to exchange routing information.
D) The route reflectors must be reachable between different data centers.
5. Which of the following statements about PE-CE routing is FALSE?
A) BGP is the preferred option for PE-CE routing as it scales better than static routing.
B) The CE advertises BGP EVPN route type 5 updates to the PE and the PE forwards to other PEs.
C) eBGP is preferred which means that the PE and CE are required to be in different autonomous systems.
D) There are two methods to implement routing between the PE and CE, static and dynamic.
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: D | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: B |






