OpenStack OpenStack Networking (Neutron) 2

Question 1

Which Neutron plug-in mechanism uses software-defined networking (SDN) with virtual switches?

Accepted Answer

Open vSwitch (OVS) ML2 driver

Answer

The Open vSwitch (OVS) ML2 driver is a widely used Neutron mechanism driver that leverages OVS for virtual switching.

Question 2

What does ML2 stand for in the context of Neutron's plugin architecture?

Accepted Answer

Modular Layer 2

Answer

ML2 stands for Modular Layer 2, a framework that allows OpenStack Neutron to use multiple Layer 2 technologies simultaneously.

Question 3

In Neutron, what is a 'subnet' defined as?

Accepted Answer

A block of IP addresses and associated configuration assigned to a network

Answer

A subnet in Neutron is a block of IP addresses (CIDR) with configuration like gateway and DNS assigned to a network.

Question 4

Which Neutron agent handles DHCP requests for VMs on tenant networks?

Accepted Answer

neutron-dhcp-agent

Answer

The neutron-dhcp-agent provides DHCP services for tenant networks by managing dnsmasq processes.

Question 5

What is VXLAN in the context of OpenStack Neutron overlay networks?

Accepted Answer

A tunneling protocol that encapsulates L2 frames in UDP to extend networks over L3

Answer

VXLAN (Virtual Extensible LAN) encapsulates Layer 2 Ethernet frames within UDP packets, enabling large-scale overlay networks.

OpenStack Practice Test