Linksys Annex B ADSL2 Gateway with 4-Port Switch. Management protocols: Port Filtering, MAC, IP Address Filtering, DMZ Hosting, NAT Technology. Security algorithms supported: SPI. Networking features: Ethernet, Cabling technology: CAT 5 UTP (Ethernet), ADSL. Cable type: RJ45, RJ11. Minimum system requirements: Internet Explorer 5.0 / Netscape Navigator 6 CD-ROM ADSL, Minimum RAM: 64 MB