NE NE Network Virtualization 3

Question 1

What is the VNI (VXLAN Network Identifier) used for in a VXLAN deployment?

Accepted Answer

Uniquely identifying a VXLAN segment, similar in concept to a VLAN ID

Answer

Identifying the source IP address of a VXLAN tunnel endpoint

Answer

Setting the QoS priority level for VXLAN encapsulated traffic

Answer

Encrypting the VXLAN payload data between VTEPs

Question 2

What does EVPN (Ethernet VPN) provide in a VXLAN-based network virtualization environment?

Accepted Answer

A BGP-based control plane for distributing MAC and IP reachability information

Answer

Encrypted VPN tunnels for remote end-user access

Answer

A replacement for Spanning Tree Protocol in physical networks

Answer

Virtual private LAN services delivered over WiFi infrastructure

Question 3

What is Service Function Chaining (SFC) used for in NFV architectures?

Accepted Answer

Defining an ordered sequence of virtual network functions that traffic must traverse

Answer

Physically cabling network appliances in a specific order

Answer

Synchronizing service configurations across multiple data centers

Answer

Chaining VXLAN tunnels for multi-hop overlay paths

Question 4

In VXLAN, how is BUM (Broadcast, Unknown unicast, Multicast) traffic typically handled?

Accepted Answer

It is replicated to all VTEPs via multicast groups or ingress replication

Answer

It is dropped silently to prevent flooding in the overlay

Answer

It is converted to unicast traffic using ARP suppression only

Answer

It is forwarded only to the spine layer switches for processing

Question 5

In a leaf-spine data center fabric architecture, what is the primary role of leaf switches?

Accepted Answer

Connecting servers and end devices to the network fabric

Answer

Interconnecting spine switches to provide path redundancy

Answer

Providing WAN connectivity to external networks and the internet

Answer

Running the SDN controller software for the fabric

Question 6

What is the primary benefit of network virtualization for multi-tenancy in cloud environments?

Accepted Answer

Providing isolated virtual networks for different tenants on shared physical infrastructure

Answer

Reducing the total number of physical switches required in the data center

Answer

Automatically assigning unique IP addressing schemes to each tenant

Answer

Encrypting all inter-tenant traffic by default without configuration

Question 7

What distinguishes a Type 2 hypervisor from a Type 1 hypervisor in a virtualized network environment?

Accepted Answer

Type 2 runs on top of a host operating system rather than directly on hardware

Answer

Type 2 supports more virtual machines than Type 1

Answer

Type 2 provides better network performance than Type 1

Answer

Type 2 is used exclusively in cloud environments