Cisco ENCOR Network Virtualization 2 — Questions and Answers
Question 1: What is the primary role of a VTEP in a VXLAN network?
- Route between VXLANs
- Encapsulate and decapsulate VXLAN packets (Correct answer)
- Assign VNIs to hosts
- Provide DHCP to overlay hosts
Correct answer: Encapsulate and decapsulate VXLAN packets
A VXLAN Tunnel Endpoint (VTEP) performs the encapsulation of Layer 2 frames into VXLAN/UDP and the reverse decapsulation.
Question 2: In NFV, which component provides the virtual infrastructure resources such as compute, storage, and networking?
- VNF
- MANO
- NFVI (Correct answer)
- OSS/BSS
Correct answer: NFVI
The NFV Infrastructure (NFVI) encompasses the hardware and virtualization layers that host the VNFs.
Question 3: Which multicast address does VXLAN use for BUM traffic when flooding is enabled?
- 224.0.0.1
- 239.x.x.x (configured multicast group) (Correct answer)
- 255.255.255.255
- 224.0.0.5
Correct answer: 239.x.x.x (configured multicast group)
VXLAN BUM (Broadcast, Unknown-unicast, Multicast) traffic uses a configured multicast group address in the 239.x.x.x range.
Question 4: Which Cisco technology provides the underlay network automation and telemetry for SD-WAN fabrics?
- DNA Center (Correct answer)
- Prime Infrastructure
- NSO
- APIC
Correct answer: DNA Center
Cisco DNA Center provides network automation, assurance, and analytics that complement SD-WAN underlay management.
Question 5: In LISP, which device answers Map-Request queries by providing EID-to-RLOC mappings?
- ITR
- ETR
- MS/MR (Correct answer)
- PxTR
Correct answer: MS/MR
The Map Server (MS) and Map Resolver (MR) store and resolve EID-to-RLOC mappings in the LISP control plane.
Question 6: What is the default administrative distance of OMP routes on a Cisco SD-WAN WAN Edge router?
- 1
- 20
- 251 (Correct answer)
- 254
Correct answer: 251
OMP routes have a default administrative distance of 251 on WAN Edge routers, making them lower priority than most IGP routes.
Cisco ENCOR Network Virtualization 2
What is the primary role of a VTEP in a VXLAN network?