nokia 4a0-d01 practice test

Which of the following statements about IP-VRFs in Nokia’s SR Linux is FALSE?

• A. An IP-VRF is a Layer 3 network instance.
• B. Packets in an IP-VRF are forwarded based on the destination IP address.
• C. The router maintains a distinct route table for each IP-VRF instance.
• D. Multiple servers can be connected to the same subnet in an IP-VRF.

Which of the following statements about the MAC table shown in the exhibit output is FALSE?

• A. The MAC address 00:25: BA:00:00:10 is learnt on more than one interface.
• B. The MAC re-learning rate has exceeded the threshold within the specified time frame.
• C. [interface ethernet-1/10 is configured with the MAC address 00:25:BA:00:00:10.
• D. Mac-duplication detection is enabled in mac-vrf-1.

Which of the following statements about a MAC-VRF is FALSE?

• A. A MAC-VRF is a Layer 2 network instance.
• B. Bridge table entries contain an exit interface for each destination address.
• C. Packets received in a MAC-VRF are forwarded based on destination IP address.
• D. Multiple devices can be connected to the same IP subnet using a MAC-VRF.

Which of the following statements about resilient ECMP load balancing is TRUE?

• A. The hash value used to distribute traffic is calculated as a modulo function on specific fields of the packet header.
• B. Hash buckets are used to ensure that flows egressing the same interface on one router use different egress interfaces on downstream routers.
• C. A different hash seed is used on downstream routers to ensure that flows are randomly distributed across all eligible router interfaces.
• D. When one of the next-hops fail, only flows currently egressing to that next-hop are impacted.

Examine the exhibit. Which of the following statements is TRUE?

• A. A recursive lookup is performed to resolve 10.2.1.0 to use 10.1.1.0.
• B. A recursive lookup is performed to resolve 10.1.1.0 to use 10.2.1.0.
• C. The next-hop group for this static route is configured with two next-hops.
• D. The next-hop selected for this route will be based on the preference value configured for each next-hop.

A static route is configured in two steps in Nokia’s SR Linux. Which of the following items CANNOT be
configured in the static-routes container?

• A. blackhole
• B. IPv4 destination prefix
• C. Preference value
• D. Next-hop group

Which of the following statements about next-hop groups is TRUE?

• A. The next-hop for a next-hop-group must be a local IP address.
• B. Multiple static routes can use the same next-hop-group.
• C. CMP destination unreachable message is always sent when blackhole is specified in the next-hop- group.
• D. A next-hop-group can only specify one next-hop for forwarding

Which of the following is NOT how prefixes are typically learned and advertised in a leaf and spine
data center?

• A. Spine routers advertise learned prefixes to leaf routers directly using eBGP.
• B. Spine routers learn prefixes from leaf routers directly using eBGP.
• C. Each leaf router advertises the prefixes of its own locally connected servers.
• D. Each leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.

Which of the following statements about using BFD with BGP is FALSE?

• A. It can help rapidly detect link failures.
• B. The BFD endpoints agree on the send/receive rate of control packets.
• C. BGP is notified if several BFD control packets are missed.
• D. Using BFD can speed up the BGP advertisement interval.

Which of the following statements about the VXLAN tunneling in data centers is FALSE?

• A. VXLAN tunnel endpoints can be on hypervisors, leaf routers, or datacenter gateways.
• B. EVPN routes are exchanged between VXLAN tunnel endpoints.
• C. Each VXLAN tunnel endpoint is automatically assigned with a unique VNI value.
• D. VLXAN tunneling is used to provide Layer 2 connectivity between workloads over a common underlay network.