The cable modem translates the downstream radio frequencies into packets, determines whether the packets are destined for that particular cable modem and sends the packets along to a computer or a LAN on the client side of the cable modem.

• Cable modem把下行流射频转换成包，确定包的目的是否指向一个特定的cable modem和送到一台计算机，还是该modem客户端的局域网。