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  Historically, creation of multiple networks required multiple switches, and VLANs (Virtual Local Area Networks) have changed all of that. Presently, more than one network can be created on a single switch. 
  A VLAN is not of much use if it has not been assigned an IP Address, the subnet net mask, and port membership. In normal network segment configurations on routers, individual interfaces or groups of interfaces (referred to as channels) are assigned IP addresses. When VLANs are used, individual interfaces are VLAN members, do not have individual IP addresses, and generally do not have access lists applied to them. Those features are usually reserved for the VLAN interfaces. 
  Monthly fee for each VLAN connection point for 10 Mb/s constitutes 25, 000 AMD.