Beetel 450 TC1 is a WiFi Modem with four Ethernet ports. The Modem support latest ADSL and WiFi standards with a maximum download speed of 24Mbps. You can configure this for BSNL, MTNL or any other ADSL broadband connections through the user friendly web interface.
Mac filtering will give you additional foolproof WiFi security. MAC(Media Access Control) address is a unique number of each network hardware. This is the identity of a machine . There will not be two network cards(Any type) with a same MAC address. This is the manufacture set hard coded one.