WGU D415 Software-Defined Networking OA: Practice Questions and Verified Answers (2026 Update)

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WGU D415 Software-Defined Networking OA:
Practice Questions and Verified Answers (2026
Update)
1. Which approach improves the strength of software-defined networking
(SDN) security and intrusion tolerance?
Controller diversity
Controller consolidation
Logging
Virtualization - ANSWER Controller diversity

2. Which design component is incorporated in the software-defined networking
(SDN) framework security?

Proactive and reactive security recovery mechanisms maintain optimal
service availability.
Each controller has controls for every switch with multiple-controller
domains.
Controller and management plane applications have a built-in mechanism to
establish trust.
The association between the controller and devices such as OpenFlow
switch are static in nature. - ANSWER Proactive and reactive security
recovery mechanisms maintain optimal service availability.

3. What does clustering defend against?

Single point of failure in a controller
Lateral movement of an attacker
Blurred trusted domain boundaries
Internal network attacks - ANSWER Single point of failure in a controller
4. Which OSI model layer is responsible for the segment protocol data unit?

Network
Transport
Application
Data link - ANSWER Transport

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5. Which protocol in the software-defined networking (SDN) framework is
responsible for defining the communication between the controller and a
network device?

OpenFlow
Telnet
Point-to-point
Address resolution - ANSWER OpenFlow

6. Which network automation tool is open source?

BlueCat gateway
Chef
Ansible
Puppet Enterprise - ANSWER Ansible

7. What is a benefit of using network automation?

Backing up and restoring data
Using infrastructure as code to maintain a reliable state
Dynamic allocation of IP addresses
Boosting storage - ANSWER Using infrastructure as code to maintain a
reliable state

8. Which service introduces flexibility, dynamism, and automation into the
management of network objects?

Open source for network functions virtualization (NFV)
OpenStack
Network functions virtualization (NFV)
Software-defined networking (SDN) - ANSWER Software-defined
networking (SDN)

9. Which OpenStack unit provides authentication?

Cinder
Nova
Keystone
Neutron - ANSWER Keystone

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10.Network Functions Virtualization (NFV) - ANSWER Moved network
functions from stand-alone appliances to software running on any server,
reducing the time-to-market for products.

11.Software-Defined Networks (SDN) - ANSWER This architecture decouples
the network control and forwarding functions enabling the network control
to become directly programmable and the underlying infrastructure to be
abstracted for applications and network services.

12.NFV Components - ANSWER Virtual Network Functions (VNFs)
Network Functions Virtualization Infrastructure (NFVI)
NFV Management and Orchestration (NFV-MANO)

13.NFV Management and Orchestration (NFV-MANO) - ANSWER Consists
of all functional blocks, data repositories, reference points, and interfaces
that are used for managing and orchestrating VNFs and the NFVI.

14.Network Functions Virtualization Infrastructure (NFVI) - ANSWER Is the
entirety of the hardware and software components that build the
environment where VNFs are deployed.

15.Virtual Network Functions (VNFs) - ANSWER Are the software
implementations of network functions.

16.Open Platform for NFV (OPNFV) - ANSWER Created by the Linux
Foundation in 2014 and is a collaborative open-source platform that seeks to
develop NFV and shape its evolution.

17.OpenStack - ANSWER An open-source cloud computing platform that has
high market penetration that includes a collection of interoperable modules
that are used to orchestrate large pools of compute, storage, and networking
resources.

18.Nova - ANSWER OpenStack compute module, is used to create and delete
compute instances as required.

19.Glance - ANSWER OpenStack module that synchronizes and maintains VM
images across the com pute cluster.

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20.Keystone - ANSWER Module that provides authentication for accessing all
OpenStack services.

21.Cinder - ANSWER OpenStack module that provides block storage used as
storage volumes for VMs.

22.Swift - ANSWER OpenStack module that provides object storage that is
used to store large amounts of static data in a cluster.

23.Neutron - ANSWER or networking, OpenStack module that allows the
different compute instances and storage nodes to communicate with each
other.

24.Horizon - ANSWER OpenStack module provides a GUI dashboard, and is
by far the most widely deployed management module.

25.Heat - ANSWER OpenStack module that helps expedite orchestration of
applications across multiple compute instances by using templates.

26.Celiometer - ANSWER OpenStack module that monitors the NFVI and
helps identify bottlenecks and resource optimization opportunities.

27.Ironic - ANSWER OpenStack module that is a provisioning tool for
baremetal installation of compute capabilities instead of VMs in OpenStack.

28.Congress - ANSWER OpenStack module that is a policy management
framework for the OpenStack environment.

29.Designate - ANSWER OpenStack module that is used to point applications
in the OpenStack environment to a trusted DNS source.

30.Barbican - ANSWER OpenStack module that works with Keystone
authentication to manage internal application security by behaving as a key
manager.

31.Murano - ANSWER OpenStack module that provides a white list repository
of applications.