WGU D415 EXAM SCRIPT 2026 ACTUAL
EXAM QUESTIONS AND SOLUTIONS
◍ VNF (Virtual Network Function). Answer: Software-based
implementation of a network function, like a firewall or load balancer.
◍ VNFM (VNF Manager). Answer: Manages lifecycle of VNFs,
including deployment and scaling.
◍ VNFI (VNF Infrastructure). Answer: Physical resources (compute,
storage, etc.) hosting VNFs.
◍ CVSS (Common Vulnerability Scoring System). Answer:
Framework for assessing and rating vulnerabilities.
◍ NIST 800-125B. Answer: NIST guide for security of mission-
critical telecommunication networks.
◍ NIST 800-53. Answer: NIST standard for information security
controls.
◍ SDN (Software Defined Networking). Answer: Focuses on network
control by separating control and data planes.
, ◍ Open Platform. Answer: A flexible framework allowing integration
of various components.
◍ Open Source. Answer: Software with source code accessible to the
public for modification and improvement.
◍ Northbound API. Answer: Points towards the user or applications.
It's the interface that applications or users interact with to access
network services.
◍ Southbound API. Answer: Points towards the network devices and
infrastructure. It's the interface used by the controller to communicate
and manage the underlying network devices.
◍ NFV Definition. Answer: NFV is a network architecture concept
that uses virtualization technologies to transform traditional network
functions that were traditionally performed by dedicated hardware
appliances into software-based functions.
◍ NFV Detail. Answer: NFV allows network services to be
implemented in software, running on standard servers, instead of
relying on specialized hardware.
◍ VNF Definition. Answer: A VNF is a software-based
implementation of a network function that can be deployed on a
virtualized infrastructure.
EXAM QUESTIONS AND SOLUTIONS
◍ VNF (Virtual Network Function). Answer: Software-based
implementation of a network function, like a firewall or load balancer.
◍ VNFM (VNF Manager). Answer: Manages lifecycle of VNFs,
including deployment and scaling.
◍ VNFI (VNF Infrastructure). Answer: Physical resources (compute,
storage, etc.) hosting VNFs.
◍ CVSS (Common Vulnerability Scoring System). Answer:
Framework for assessing and rating vulnerabilities.
◍ NIST 800-125B. Answer: NIST guide for security of mission-
critical telecommunication networks.
◍ NIST 800-53. Answer: NIST standard for information security
controls.
◍ SDN (Software Defined Networking). Answer: Focuses on network
control by separating control and data planes.
, ◍ Open Platform. Answer: A flexible framework allowing integration
of various components.
◍ Open Source. Answer: Software with source code accessible to the
public for modification and improvement.
◍ Northbound API. Answer: Points towards the user or applications.
It's the interface that applications or users interact with to access
network services.
◍ Southbound API. Answer: Points towards the network devices and
infrastructure. It's the interface used by the controller to communicate
and manage the underlying network devices.
◍ NFV Definition. Answer: NFV is a network architecture concept
that uses virtualization technologies to transform traditional network
functions that were traditionally performed by dedicated hardware
appliances into software-based functions.
◍ NFV Detail. Answer: NFV allows network services to be
implemented in software, running on standard servers, instead of
relying on specialized hardware.
◍ VNF Definition. Answer: A VNF is a software-based
implementation of a network function that can be deployed on a
virtualized infrastructure.
