Cloud Hosting what is
Virtual Networks
Virtual networks or virtual LANs a group of two or more hosts with common requirements that are communicating as if they were in the same domain disregarding their physical location.
This type of network have the same physical attributes of a local network but allow them to be together even that they are not in the same switch.
Types of VLANs:
- Central port VLAN
Where are the nodes of a VLAN are connected by using the same port
- Static VLAN
The switch ports are previously assigned to workstations
- VLANs by protocol
Each VLAN have am assigned protocol. The switch is in charge of deriving the plot according to the protocol. This allows a dynamic assignment and segment by protocol.
- VLANs by IP address
IP addresses with VLAN access are configured. Just like VLANs based on MAC, there's no need to reconfigure the switch but the packages have to be smaller and this wastes time on reading from the IP tables.
- VLANs based on user name
They are based on authenticating users, which gives more movement freedom to each member of a VLAN and allows multiple protocols.
- VLANs based on ports
Shows to which ports belongs each VLAN, having the advantage that changes can be made rapidly. The domain in diffusion is reduced and the protocol in use is not important
- VLANs by MAC address
Each member of a VLAN are identified using their MAC. Even that they are advantageous because we can change the position of any workstation (thus avoiding the reconfiguration of the switch), these are more complex to manage and there are more performance problems.
By: Carlos Castillo, Albert Sirvent