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Nokia 4A0-D03 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: SR Linux and EVPN Fundamentals | 25% | - SR Linux architecture and CLI - EVPN control plane and MP-BGP - VXLAN encapsulation and underlay |
| Topic 2: Layer 2 EVPN Services | 25% | - Anycast Gateway and IRB - Multi-homing and Ethernet Segments - EVPN Route Types 1–4 |
| Topic 3: Data Center Interconnect (DCI) Solutions | 25% | - BGP route policies and route reflectors - Gateway-less EVPN DCI - Interoperability with Nokia 7750 SR |
| Topic 4: Layer 3 EVPN Services | 25% | - EVPN Route Type 5 - Symmetric and asymmetric routing - VRF integration and route targets |
Nokia SR Linux EVPN and Data Center Interconnect Sample Questions:
1. Consider the exhibit.
Leaf-1 has received an ARP request from host-1 for host-2. Leaf-1 has added host-1's MAC address in its MAC table and host-1's MAC/IP addresses in its proxy-ARP table.
Which of the following steps is FALSE?
A) Leaf-1 sends a route-type 2 EVPN update with host-1's MAC with the IP address set to 0.0.0.0 to the remote peers.
B) The remote peers generate a gratuitous ARP towards their directly connected hosts to announce the learned IP/MAC mapping information.
C) The remote peers ignore the EVPN update with the IP address set to 0.0.0.0 and use the update with the IP address set to 192.168.100.1 to populate their MAC forwarding tables.
D) Leaf-1 sends a route-type 2 EVPN update with host-1's MAC with the IP address set to 192.168.100.1 to the remote peers.
2. A host is connected to a MAC-VRF on leaf1 and leaf2. The MAC-VRF interfaces on leaf1 and leaf2 are associated to an Ethernet segment configured for active-standby multi-homing.
Which of the following statements is FALSE?
A) Only the DF will accept traffic from the host.
B) The DF will forward all BUM traffic from the remote PEs to the host.
C) The non-DF is capable of forwarding unicast traffic from the remote PEs to the host.
D) Leaf1 and leaf2 will hold an election to identify which leaf router will be the DF for the MAC-VRF.
3. Consider the exhibit.
Which of the following statements about the configuration and operation of this setup is FALSE?
A) A sub-interface of lag1 is associated to the MAC-VRF on Leaf1 and Leaf2.
B) The Ethernet segment ES-1 is configured with multi-homing-mode all-active.
C) The MAC-VRF on Leaf3 will need to be configured with ECMP to be able to load balance between Leaf1 and Leaf2.
D) The host will forward all BUM traffic toward the DF.
4. Which of the following EVPN route-types is used to implement aliasing?
A) AD per EVI routes
B) IP/MAC routes
C) AD per ES routes
D) Ethernet segment routes
5. Which of the following statements about the decoupled gateway-based data center interconnect solution is FALSE?
A) The WAN PE maintains a peering session with the data center route-reflector for the exchange of updates.
B) The EVPN services in the data center are interconnected to different VPN services in the WAN.
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.
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: C | Question # 3 Answer: D | Question # 4 Answer: A | Question # 5 Answer: A |

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