Cisco ENCOR Network Virtualization

Question 1

Which protocol is used as the data plane encapsulation in VXLAN overlays?

Accepted Answer

UDP

Answer

VXLAN encapsulates Layer 2 frames inside UDP packets, using destination port 4789 by default.

Question 2

What is the VXLAN Network Identifier (VNI) field size?

Accepted Answer

24 bits

Answer

The VNI is a 24-bit field, allowing up to 16 million unique overlay segments.

Question 3

In a Cisco SD-WAN fabric, which component is responsible for centralized policy and management?

Accepted Answer

vManage

Answer

vManage is the centralized NMS/orchestrator for Cisco SD-WAN, handling policy, monitoring, and configuration.

Question 4

Which Cisco SD-WAN component acts as the orchestrator and facilitates initial authentication of WAN Edge routers?

Accepted Answer

vBond

Answer

vBond is the orchestration plane component that authenticates and redirects WAN Edge devices to vSmart and vManage.

Question 5

What technology does LISP use to separate host identity from its location?

Accepted Answer

EID and RLOC

Answer

LISP separates the Endpoint Identifier (EID) from the Routing Locator (RLOC) to enable scalable mobility.

Cisco ENCOR Practice Test