Latest 2026/2027 WGU D415 | Software-Defined Networking (SDN)
| Objective Assessment (Oa) Exam Questions and Answers
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) - correct answer >>>Software-defined networking
(SDN)
Which OpenStack unit provides authentication?
Cinder
Nova
Keystone
Neutron - correct answer >>>Keystone
Which interface in SDN allows the controller to communicate, interact, and manage
forwarding elements?
Westbound
Flow ID
Southbound
Eastbound - correct answer >>>Southbound
Which OpenFlow SDN controller has a multi-threaded, cross-platform, and modular
emphasis?
FlowVisor
OpenDaylight (ODL) Project
Floodlight
Beacon - correct answer >>>Beacon
Which port number is used as the destination of a server by Dynamic Host
Configuration Protocol?
23
53
67
68 - correct answer >>>67
Which IPv6 address identifies each network interface?
,Multicast
Broadcast
Anycast
Unicast - correct answer >>>Anycast
Which network virtualization (NV) approach refers to a logical local area network (LAN)
based on physical LANs?
Virtual private networks (VPN)
Virtual private LAN services (VPLS)
Virtual LANs (VLANs)
Wide area network (WAN) - correct answer >>>Virtual LANs (VLANs)
Which network virtualization benefit involves using virtual networks to create slices to
reserve networking resources?
Debugging and intrusion detection
Resource optimization
Mobility
Testing/quality assurance - correct answer >>>Debugging and intrusion detection
Which layer 2 virtual networking device is responsible for controlling data frames to
connected devices?
Router
Hub
Bridge
Switch - correct answer >>>Switch
Which virtual networking protocol is used to support VPNs and does not provide
encryption?
Layer 2 Tunneling Protocol (L2TP)
Point-to-Point Protocol (PPP)
Internet Key Exchange version 2 (IKEv2)
Secure Socket Layer (SSL) - correct answer >>>Layer 2 Tunneling Protocol (L2TP)
What is the AAA mechanism responsible for granting user privileges to network
resources?
Authorization
Authentication
Accounting
Availability - correct answer >>>Authorization
Which authentication type validates a user based on what the person knows?
, Retinal scans
Swipe card
Password
Unique tokens - correct answer >>>Password
Which OSI model layer is responsible for the segment protocol data unit?
Network
Transport
Application
Data link - correct answer >>>Transport
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 - correct answer >>>OpenFlow
Which network automation tool is open source?
BlueCat gateway
Chef
Ansible
Puppet Enterprise - correct answer >>>Ansible
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 - correct answer >>>Using infrastructure as code to maintain a
reliable state
Which phase of an attack involves the attacker gathering information about the target?
Escalating privileges
Exploiting the system
Clearing tracks
Reconnaissance - correct answer >>>Reconnaissance
Which term refers to a weakness or gap in a security system that can be exploited by an
attacker?
| Objective Assessment (Oa) Exam Questions and Answers
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) - correct answer >>>Software-defined networking
(SDN)
Which OpenStack unit provides authentication?
Cinder
Nova
Keystone
Neutron - correct answer >>>Keystone
Which interface in SDN allows the controller to communicate, interact, and manage
forwarding elements?
Westbound
Flow ID
Southbound
Eastbound - correct answer >>>Southbound
Which OpenFlow SDN controller has a multi-threaded, cross-platform, and modular
emphasis?
FlowVisor
OpenDaylight (ODL) Project
Floodlight
Beacon - correct answer >>>Beacon
Which port number is used as the destination of a server by Dynamic Host
Configuration Protocol?
23
53
67
68 - correct answer >>>67
Which IPv6 address identifies each network interface?
,Multicast
Broadcast
Anycast
Unicast - correct answer >>>Anycast
Which network virtualization (NV) approach refers to a logical local area network (LAN)
based on physical LANs?
Virtual private networks (VPN)
Virtual private LAN services (VPLS)
Virtual LANs (VLANs)
Wide area network (WAN) - correct answer >>>Virtual LANs (VLANs)
Which network virtualization benefit involves using virtual networks to create slices to
reserve networking resources?
Debugging and intrusion detection
Resource optimization
Mobility
Testing/quality assurance - correct answer >>>Debugging and intrusion detection
Which layer 2 virtual networking device is responsible for controlling data frames to
connected devices?
Router
Hub
Bridge
Switch - correct answer >>>Switch
Which virtual networking protocol is used to support VPNs and does not provide
encryption?
Layer 2 Tunneling Protocol (L2TP)
Point-to-Point Protocol (PPP)
Internet Key Exchange version 2 (IKEv2)
Secure Socket Layer (SSL) - correct answer >>>Layer 2 Tunneling Protocol (L2TP)
What is the AAA mechanism responsible for granting user privileges to network
resources?
Authorization
Authentication
Accounting
Availability - correct answer >>>Authorization
Which authentication type validates a user based on what the person knows?
, Retinal scans
Swipe card
Password
Unique tokens - correct answer >>>Password
Which OSI model layer is responsible for the segment protocol data unit?
Network
Transport
Application
Data link - correct answer >>>Transport
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 - correct answer >>>OpenFlow
Which network automation tool is open source?
BlueCat gateway
Chef
Ansible
Puppet Enterprise - correct answer >>>Ansible
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 - correct answer >>>Using infrastructure as code to maintain a
reliable state
Which phase of an attack involves the attacker gathering information about the target?
Escalating privileges
Exploiting the system
Clearing tracks
Reconnaissance - correct answer >>>Reconnaissance
Which term refers to a weakness or gap in a security system that can be exploited by an
attacker?
