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Nokia BL0-220 Exam (page: 1)
Nokia Bell Labs Distributed Cloud Networks
Updated on: 31-Mar-2026

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BL0-220 PDF 60 Questions

What are the available options to interconnect private Datacenters? (Select 2)

  1. VPN
  2. Backbone
  3. VLAN
  4. VIP

Answer(s): A,B

Explanation:

The available options to interconnect private Datacenters are VPN and Backbone. VPN stands for Virtual Private Network, which is a secure and encrypted connection between two or more networks over the public internet. Backbone is a high-capacity network that connects different data centers across regions or countries. Both VPN and Backbone provide reliable, scalable, and secure data center interconnect (DCI) solutions for private/hybrid clouds.


Reference:

Nokia Cloud DCI offers a more scalable, reliable and secure way to connect data centers in private/hybrid clouds, Nokia business-critical cloud DCI solutions support multiple DCI applications, from real-time business continuity and disaster recovery, to synchronous data replication and cloud backup, Nokia partners with IP Telecom to deliver quantum-safe data center connectivity



Which of the following are properties related to a private cloud? (Select 2)

  1. No OPEX
  2. Mixed with Public Cloud
  3. High CAPEX
  4. Software as a Service
  5. Full Control

Answer(s): C,E

Explanation:

The properties related to a private cloud are high CAPEX and full control. CAPEX stands for capital expenditure, which is the money spent on acquiring or upgrading physical assets such as servers, storage, and network equipment. A private cloud requires high CAPEX because the cloud owner has to invest in building and maintaining the cloud infrastructure. Full control means that the cloud owner has the exclusive authority and responsibility over the cloud resources, security, and operations. A private cloud offers full control because the cloud owner can customize the cloud according to their specific needs and preferences, and can ensure the privacy and compliance of their data and applications.


Reference:

Nokia Cloud Platform, Module by Module - Self Study Note Guide



A group of small services combine to deliver user specific service.

  1. True
  2. False

Answer(s): A

Explanation:

A group of small services combine to deliver user specific service is a true statement. This is the definition of microservices, which are a key component of cloud technologies and features. Microservices are independent, modular, and scalable services that communicate with each other through APIs. They enable faster and easier development, deployment, and maintenance of cloud applications.


Reference:

Nokia Bell Labs 5G Professional Certification - Distributed Cloud Networks | Nokia Distributed Cloud Networks, Unit 2: Cloud Technologies and Features, slide 6 Nokia Bell Labs 5G Certification Program - Courses | Nokia, Distributed Cloud Networks, Unit 2:
Cloud Technologies and Features



Which of the following are Software as a Service? (Select 2)

  1. Database-as-a-Service
  2. Infrastructure-as-a-Service
  3. Artificial Intelligence-as-a-Service
  4. Platform -as-a-Service

Answer(s): A,D

Explanation:

Software as a Service (SaaS) is a cloud computing offering that provides users with access to a vendor's cloud-based software. Users do not install applications on their local devices. Instead, the applications reside on a remote cloud network accessed through the web or an API. Within this context, Database-as-a-Service (DBaaS) is considered a form of SaaS, where the service provider manages the database's installation, maintenance, backup, and scaling needs on behalf of the customer. Platform-as-a-Service (PaaS) provides a platform allowing customers to develop, run, and manage applications without dealing with the complexity of building and maintaining the infrastructure typically associated with developing and launching an app. PaaS can include various software components, including database management systems, and thus can be considered a subset of SaaS.



What does OCP stands for?

  1. Open Data Center Platform
  2. Open Compute Project
  3. Operations and Control
  4. Open Circuit Platform

Answer(s): B

Explanation:

OCP stands for Open Compute Project, which is an initiative to design and enable the delivery of the most efficient server, storage and data center hardware designs for scalable computing1. OCP is the primary cloud infrastructure platform to develop, test and deliver Nokia's core network applications and business applications, benefiting from its scalability, flexibility, and advanced orchestration capabilities2. OCP is also part of the Nokia Cloud Platform, which is a TCO optimized solution that combines OCP with Nokia's reference hardware and blueprint architecture2.


Reference:

1: Open Compute Project, Home Page 2: Nokia Cloud Platform,



Which one of the following requires a Network Service Descriptor defined in a catalog?

  1. Cloud infrastructure software
  2. Cloud orchestration
  3. Software defined network
  4. Cloud software platform

Answer(s): B

Explanation:

A Network Service Descriptor (NSD) is a template that defines the characteristics and requirements of a network service, such as the number and type of virtual network functions (VNFs), the connectivity and topology between them, the scaling policies, and the service level agreements1. A NSD is defined in a catalog that is managed by the cloud orchestration layer, which is responsible for deploying, monitoring, and controlling the network services across the distributed cloud2. Therefore, cloud orchestration requires a NSD defined in a catalog, while the other options do not.


Reference:

1: Nokia Bell Labs Distributed Cloud Networks, Unit 3: Cloud Resource Planning, Topic: Network Service Descriptor Role 2: Nokia Bell Labs Distributed Cloud Networks, Unit 4:
Operating Your Cloud, Topic: Cloud Orchestration
A Network Service Descriptor (NSD) is an integral part of network function virtualization (NFV) architecture. It describes the composition of network services, including how different network functions are chained or combined to provide a specific service. Cloud orchestration involves the automated management of various cloud computing services and resources, including networking services. It requires a comprehensive description of these services (i.e., NSD) to automate their deployment, scaling, and management effectively. NSD in a catalog would be used to define the parameters and configurations needed for the orchestrated service to be deployed in a cloud environment, making cloud orchestration the most likely context for requiring an NSD.



What are the three key drivers required for video-based service in on-premise cloud? (Select 3)

  1. Convenience
  2. Latency
  3. Privacy
  4. Capacity

Answer(s): B,C,D

Explanation:

Latency, Privacy and Capacity are the three key drivers required for video-based service in on- premise cloud. Latency refers to the delay between the source and the destination of a video stream, which affects the quality of experience for the end-users. Privacy refers to the protection of the video content and the user data from unauthorized access or leakage. Capacity refers to the ability of the network and the cloud to handle the high bandwidth and storage demands of video applications. On- premise cloud is a cloud deployment model where the cloud infrastructure is located within the enterprise premises, and is managed by the enterprise or a third-party service provider. On-premise cloud can offer lower latency, higher privacy and greater capacity for video-based service than public cloud, which is located outside the enterprise premises and is shared by multiple tenants.


Reference:

Nokia Bell Labs 5G Professional Certification - Distributed Cloud Networks, Unit
2: Cloud Technologies and Features, Section 2.3: Cloud Deployment Models.



Which of the following are benefits of life cycle management?

  1. Life cycle is short.
  2. Life cycle management is only applicable to cloud native.
  3. All life cycle stages are clearly identified.

Answer(s): C

Explanation:

All life cycle stages are clearly identified. Comprehensive Explanation and Reference of
Answer; Life cycle management is the process of managing the Explanationdevelopment, deployment, operation, and decommissioning of cloud applications and services. It involves defining the requirements, design, testing, deployment, monitoring, scaling, updating, and retiring of cloud resources. One of the benefits of life cycle management is that it provides clarity and visibility into the different stages of the cloud service, from inception to termination. This helps to ensure quality, efficiency, security, and reliability of the cloud service, as well as to optimize the use of resources and reduce costs.


Reference:

Nokia Bell Labs 5G Professional Certification - Distributed Cloud Networks, Unit 4: Operating Your Cloud, slide 3
Module by Module - Self Study Note Guide, DC4.1­ Industry Trends in Data Center Hardware, page



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