Network virtualization combines hardware and software network resources into a single virtual network. There are two types: external virtualization which combines physically separate LANs or divides a LAN into VLANs, and internal virtualization which virtualizes networking within a single server. Virtualization reduces physical devices needed, allows easy network segmentation, provides rapid scalability and security, and permits failover capabilities. Examples include using VLANs to improve load balancing and segmenting networks to establish security procedures based on roles and locations.
2. What is Virtualization?
Network virtualization is the process of
combining hardware and software network
resources and network functionality into a
single, software-based administrative entity, a
virtual network.
3. Types Of Virtualization
There are two types of Virtualization :-
• External Network Virtualization
• Internal Network Virtualization
4. 1] External Virtualization
External network virtualization can combine
systems physically attached to the same local
area network (LAN) into separate virtual local
area networks (VLANs), or conversely divide
separate LANs into the same VLAN. This allows
service providers to improve a large network's
efficiency.
5. 2] Internal Virtualization
Unlike external network virtualization—which acts on
systems outside of a single server—internal network
virtualization acts within 1 server to emulate a
physical network. This is typically done to improve
a server's efficiency, and involves configuring a
server with software containers.
6. Need Of Virtualization
Reduces the number of physical devices needed
Allows to easily segment networks
Permits rapid change / scalability & agile
deployment
Provides security from destruction of physical
devices
Allows failover mode – defective disk simply
switches to a backup on the fly, and the failed
component can be repaired, while the system
continues to run.
7. Examples of Network Virtualization
You can design your network so that your Local Area
Networks (LANs) are subdivided into virtual networks
and VLANs. Doing do will dramatically improve load
balancing. You can also improve security by
segmenting your network and establishing role and
location-based permissions and procedures.
