Nokia 4A0-D01 Exam Questions Instant Access

Question 1

Which of the following statements about the data center's leaf-spine topology (clos network) is FALSE?

AEach leaf router is connected to all the spine routers in the cluster.

BIt provides a consistent path for east-west traffic.

CIt uses the spanning tree protocol to avoid forwarding loops.

DIt uses ECMP to distribute traffic across duplicate links.

Answer : C

The leaf-spine (Clos) topology does not use the spanning tree protocol because it relies on equal-cost multipath (ECMP) routing to prevent loops and efficiently utilize all available paths. Spanning tree is typically avoided in modern data center fabrics to enable full bandwidth utilization.

Question 2

Which of the following statements about Zero Touch Provisioning (ZTP) is FALSE?

AThe ZTP process downloads a provisioning script defined in the TLS profile.

BThe ZTP process is managed by the ZTP application in Nokia SR Linux.

CThe ZTP process relies on a DHCP server for an IP address.

DZTP allows a router to become operational in the network without any pre-provisioning.

Answer : A

The ZTP process downloads a provisioning script typically from a defined URL or server, not from a TLS profile. The TLS profile is used for securing communications but does not define the provisioning script location.

Question 3

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

ASpine routers advertise learned prefixes to leaf routers directly using eBGP.

BSpine routers learn prefixes from leaf routers directly using eBGP.

CEach leaf router advertises the prefixes of its own locally connected servers.

DEach leaf router learns the prefixes of remote servers from other leaf routers directly using eBGP.

Answer : D

Leaf routers do not learn prefixes from other leaf routers directly using eBGP; instead, leaf routers learn remote prefixes via spine routers. The spine acts as the route reflector or intermediary between leaf routers.

Question 4

When autoboot flag is set in grub.cfg, which of the following is NOT performed as part of the Zero Touch Provisioning (ZTP) autoboot process?

AUses the DHCP server to provide the IP address and default gateway

BUses the Web or FTP server to provide the RPM packages and any necessary images

CDownloads and executes provisioning scripts

DUses Nokia's Fabric Services System to deploy the digital sandbox automatically

Answer : D

The ZTP autoboot process does not automatically use Nokia's Fabric Services System to deploy the digital sandbox; it focuses on network boot, DHCP IP assignment, and downloading/executing provisioning scripts from web or FTP servers.

Question 5

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

AIt can help rapidly detect link failures.

BThe BFD endpoints agree on the send/receive rate of control packets.

CBGP is notified if several BFD control packets are missed.

DUsing BFD can speed up the BGP advertisement interval.

Answer : D

BFD helps detect link failures rapidly and notifies BGP to trigger route updates quickly, but it does not speed up the BGP advertisement interval itself. BGP advertisement intervals are controlled by BGP timers, not by BFD.

Question 6

Which of the following Nokia's SR Linux ACLs is instantiated on all line cards to copy incoming packets to the CPM?

ACapture-filter ACL

BCPM-filter ACL

CIngress ACL

DEgress ACL

Answer : B

The CPM-filter ACL is instantiated on all line cards in Nokia's SR Linux to copy incoming packets to the Control Plane Manager (CPM) for processing.

Question 7

How does Nokia's Fabric Services System use a fabric intent to build the DC switch fabric?

AIt uses a YAML file that defines the intended configuration state of the DC fabric.

BIt uses a digital sandbox to connect workloads to the DC fabric.

CIt uses a digital sandbox to build the configuration files for the DC fabric.

DIt uses telemetry data to build the configuration files for the DC fabric.

Answer : A

Nokia's Fabric Services System uses a fabric intent defined in a declarative YAML file to specify the desired state of the data center fabric, which is then used to build and configure the fabric accordingly.

Nokia Data Center Fabric Fundamentals 4A0-D01 Exam Questions