Layer 4 addresses also can be used to build broadcast domains
or virtual LANs.
Enterprise networks are frequently built in a hierarchical fashion, with groupings of users by geography or organization tied together at the network center or core, and distinct broadcast domains
deployed to help scale, secure and improve network stability.
This confines broadcast domains
(virtual LANs) to individual IP subnets.
The switch supports virtual broadcast domains
, virtual security domains, and custom filters based on destination MAC addresses; and
These VLANs group users into different broadcast domains
to minimize broadcast traffic and ensure network security and performance.
The MegaSwitch II supports VLANs through custom filtering, port grouping and broadcast domains
Finally, Foundry's Global Ethernet solutions with MPLS offers private network security by creating separate broadcast domains
per customer while allowing customer virtual networks to share a common backbone infrastructure.