A network security system that prevents unauthorized Intemet access to the components of your private LAN; this monitors inbound and outbound traffic and restricts this traffic based on a set of rules. Firewall LAN 15p Router Question 12 converts Internet website names into IPaddresses. Domain Name Server (DN5) DHCP TCP/AP WAN Question 13 initially served as a backbone for interconnection of regional academic and military networks in the 1980 s. ARPNET INTERNET TCPIP. mow