VLAN: Key Features for Next Generation Enterprise Networks

Since the advent of the first Ethernet switch, there has been an explosion of switched Ethernet hubs in the market place. As switched Ethernet technology has matured, a better understanding of those issues that limit switch and Ethernet performance have prompted many discussions among the IEEE802 standards groups. One result of these discussions has been the development of a proposed Virtual-bridged Local Area Network (VLAN) standard. The VLAN concept allows the grouping of all Ethernet clients, connected together through various switches, bridges or hubs, into logical subgroups. Within an Ethernet switch, this logical subgrouping can be used by the switch to reduce, on a per port basis, how many outgoing packets are queued for transmission. Logical grouping of Ethernet clients also eases the task of network management. Further discussion of VLAN advantages and how they are achieved will be addressed in the article.

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