NE NE Network Virtualization

Question 1

What does SDN (Software-Defined Networking) fundamentally separate within a network architecture?

Accepted Answer

Control plane from the data plane

Answer

Data plane from the physical hardware

Answer

Management plane from the control plane

Answer

Application plane from the management plane

Question 2

Which protocol is most commonly used as the southbound API in SDN for communication between an SDN controller and network forwarding devices?

Accepted Answer

OpenFlow

Answer

OSPF

Answer

BGP

Answer

SNMP

Question 3

What is the primary purpose of VXLAN (Virtual Extensible LAN)?

Accepted Answer

To extend Layer 2 networks over a Layer 3 infrastructure

Answer

To replace VLANs entirely in small networks

Answer

To provide encryption for wireless networks

Answer

To manage IP address allocation across data centers

Question 4

What is the IANA-assigned standard UDP destination port used by VXLAN?

Accepted Answer

4789

Answer

8472

Answer

4500

Answer

6635

Question 5

What does NFV (Network Functions Virtualization) primarily aim to achieve?

Accepted Answer

Run network functions as software on commodity hardware

Answer

Replace physical switches with software-only virtual switches

Answer

Virtualize IP address management across clouds

Answer

Create encrypted tunnels between data center locations

Question 6

What is the maximum number of unique VLAN IDs supported by the IEEE 802.1Q standard?

Accepted Answer

4094

Answer

256

Answer

1024

Answer

16,777,214

Question 7

What is a key advantage of using overlay networks in a network virtualization architecture?

Accepted Answer

They provide logical network isolation independent of the physical topology

Answer

They eliminate the need for physical switches entirely

Answer

They automatically reduce IP address consumption

Answer

They automatically assign VLANs to end devices