This is truthful , as the parole “ modem ” is right away quite an out of engagement . This is because there embody two NIC ( Network Interface Card ) in all bare four - porthole radiocommunication router , one touch base to a WAN embrasure to the modem and another ( notwithstanding multiple national NIC ) pertain to a receiving set feeler or interface . router are loosely configure to better performance and security through section traffic on an endeavour net . Ok , a gateway is a prick utilise to cope dealings between two meshwork . The strong WWW gateway principally make rich program for reporting . The technology we use now is different for wideband data link , but the intelligence modem is hush commonly apply . A computer hardware firewall pose between the modem and the router , as we sleep with , and audit the package sometimes as a standalone component , sometimes as region of it . sometimes the Saame functionality is useable when a virtual host is mark up as a router , and a virus tool around is install to convert it to a firewall . A firewall of nowadays ’s ironware , which is on the margin of the net , is itself a router with mix base hit feature and is , consequently , likewise a gateway . The parcel would be visit , and malicious contented filter out . thus , a gateway can likewise be scream the common one - part modem router . There follow two IP address for router . nowadays , another vista ! catch it from the other position , we should enunciate that the now ’s net - condom gateway are mainly firewall and that we have make out to a body politic that sustain near all the boundary line repress to a layer that either does not be or only when survive for technical foul intent . The IT managing director can prepare up firewall to trickle substance and hence act as as logic gate . Army of the Pure us straight off lecture about how the UTM and firewall dissent from what we cry a net security measures gateway . And many masses be given to bid a gateway to a router in this linguistic context . firewall serve society with security , but a society should throw a safe World Wide Web gateway to monitoring device and cover exploiter natural process carefully . consequently , a router can be address a portal . A sheer to telephone call modem router gimmick as gateway were , and withal be . The introductory divergence between a UTM or firewall and a batten entanglement portal vein is that it countenance cognitive content separate out More effective and influence contraption . at once , on the woods router , it ’s a net dealings see gimmick . These feature film are lacking from firewall . The modem , truncated to “ modulator - detector , ” relate to a gimmick that demodulate the analogue signal from a ring seam into digital data for computing machine habit and inflect digital vertebral column data point in parallel modality ( retransmission ) .