Network Functions Virtualization (NFV) is a framework designed to virtualize network services traditionally run on proprietary hardware. It decouples network functions from dedicated hardware appliances and implements them as software running on standard servers or virtual machines. Let's analyze each statement:
A . The NFV framework explains how VNFs fit into the whole solution.
Correct: The NFV framework provides a structured approach to deploying and managing Virtualized Network Functions (VNFs). It defines how VNFs interact with other components, such as the NFV Infrastructure (NFVI), Management and Orchestration (MANO), and the underlying hardware.
B . The NFV Infrastructure (NFVI) is a component of NFV.
Correct: The NFV Infrastructure (NFVI) is a critical part of the NFV architecture. It includes the physical and virtual resources (e.g., compute, storage, networking) that host and support VNFs. NFVI acts as the foundation for deploying and running virtualized network functions.
C . The NFV Infrastructure (NFVI) is not a component of NFV.
Incorrect: This statement contradicts the NFV architecture. NFVI is indeed a core component of NFV, providing the necessary infrastructure for VNFs.
D . The NFV framework is defined by the W3C.
Incorrect: The NFV framework is defined by the European Telecommunications Standards Institute (ETSI), not the W3C. ETSI's NFV Industry Specification Group (ISG) established the standards and architecture for NFV.
Why These Answers?
Framework The NFV framework provides a comprehensive view of how VNFs integrate into the overall solution, ensuring scalability and flexibility.
NFVI Role: NFVI is essential for hosting and supporting VNFs, making it a fundamental part of the NFV architecture.
JNCIA Cloud Reference:
The JNCIA-Cloud certification covers NFV as part of its cloud infrastructure curriculum. Understanding the NFV framework and its components is crucial for deploying and managing virtualized network functions in cloud environments.
For example, Juniper Contrail integrates with NFV frameworks to deploy and manage VNFs, enabling service providers to deliver network services efficiently and cost-effectively.
Reference:
ETSI NFV Framework Documentation
Juniper JNCIA-Cloud Study Guide: Network Functions Virtualization