D-Link Air DWL-1500

D-Link Air DWL-1500 ... communication range of the network by providing connection among wireless users in different LANs. An IEEE 802.3af Power Over Ethernet is built into this bridge to provide easy installation for the wireless network. The DWL-1500 connects wireless local area networks together via a 2.4GHz IEEE 802.11b wireless interface. It listens to all data traffic on all its interfaces and maintains a MAC address database. MAC address information is updated dynamically. When necessary, the DWL-1500 uses the Address Resolution Protocol (ARP) to match IP addresses to MAC addresses and stores ARP information in its database as well.

The DWL-1500 uses filters to limit the wireless devices that associate with it and the data packets that are forwarded through it. Filters can provide a degree of security and improve network performance by eliminating broadcast/multicast packets from the radio network. The ACL (Access Control List) contains the MAC address of every wireless device allowed to associate with the DWL-1500 This prevents unauthorized access to network resources. The DWL-1500 can discriminate based on the destination address of packets it handles by maintaining a list of disallowed destinations. This can improve efficiency by eliminating unnecessary transmission of data packets. The type of packet forwarded through the DWL-1500 can be controlled using a filter. Filtering out unnecessary frames can improve overall network performance.