| Exam 200-155 | Question id=4573 | Network Virtualization |
Which statement accurately describes NVGRE?
| A. |
can be deployed in a unicast-only environment | |
| B. |
uses a virtual sublet ID to identify Layer 2 segment | |
| C. |
uses a join interface to discover edge devices | |
| D. |
uses a VTEP to originate and terminate tunnels |
Network Virtualization Using Generic Routing Encapsulation, or NVGRE, allows the creation of virtual Layer 2 topologies on top of a physical Layer 3 network. This design is achieved by tunneling Ethernet frames inside an IP packet over a physical network. Similar to VXLAN, NVGRE supports a 24-bit segment ID or virtual subnet identifier (VSID), providing up to 16 million virtual segments that can uniquely identify a given tenant’s segment or address space.