
Explanation/Reference:
Network Virtualization
* VPC
* VLAN
* VRF
Device Virtualization
*ASA firewall context
*IPS
*VDC
Network virtualization encompasses logical isolated network segments that share the same physical
infrastructure. Each segment operates independently and is logically separate from the other segments.
Each network segment appears with its own privacy, security, independent set of policies, QoS levels, and
independent routing paths.
Device virtualization allows for a single physical device to act like multiple copies of itself. Device
virtualization enables many logical devices to run independently of each other on the same physical piece
of hardware. The software creates virtual hardware that can function just like the physical network device.
Another form of device virtualization entails using multiple physical devices to act as one logical unit.
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 4