??CM??????

1?CM???

?????Cable Modem??????????????????????Cable Modem??????????

? ?????????????????????????????????????????????????????????????

? ???????????????RG6???????????????????CABLE MODEM???????CABLE MODEM?????????Modem??????????????
???POWER???????????????????????????????RECEIVE?????????????????10??????????????????SEND?????????????????10??????????Modem??????SERVICE??????????????????

???Modem???????????????????1-3???????POWER?SERVICE??????????BUSY?MESSAGE????????POWER?SERVICE?????????RECEIVE?SEND???????????????????????????????Cable Modem???????

??????

? ?CABLE MODEM????????CABLE MODEM??Power?Receive?Send?online????????CABLE MODEM????????USB???CABLE MODEM????????/????USB???????USB?????USB???CABLE MODEM??????Cable Modem?????USB???Cable Modem??????????????USB????????USB Modem???????????????????????????????????

? ??TCP/IP??????USB Modem?????TCP/IP?????????IP??????????DNS??

? Cable Modem???????????????????????????????????????????????????????????????????????????????????????????????????????????????????

2?CM???

????CM???ISP?????CABLE MODEM??????????????????????????????????????????????????????????????????????????????????

? ????

????????????????????????????????????CM???Windows???ICS???????????????SyGate???

SyGate???IP????

SyGate?????????????Internet???????????????Modem???Internet???????????????PC???Internet???????????????????????????????????

SyGate?????????????????????????????????????SyGate???Analog?????????ISDN?ADSL?Cable Modem???????????????Proxy Server?????SyGate??NAT???????????????????Gateway????????????????????????????

SyGate???????????????????IP????????????DNS???????????????????IP????Windows98?????????????????CP/IP??????????IP???????DNS????????

Windows2000/XP?????????????????????????????nternet???TCP/IP????????IP???????DNS????????
?????CM??????????Cable Modem?USB?????????????????????????????????????/????????

??????Cable Modem??????????????????????????Cable Modem?????????????????????/??????SyGate????????????ext??????????????????????????????Internet??????LAN?????

ping?????

??????????????????????????????????????????????ing www.it168.com -t?????IP???????????????????????equest timed out??????????????IP????????IP???

????Windows9X??????????winipcfg????????????IP??????????????????IP????Windows 2000/XP??????????cmd???????????????????ipconfig??????????IP??????????ipconfig /renew??????????????IP????

???????IP?????HCP????????????????????????????????????????????????????????????????????????

? ????

????????????Cable Modem??????????NAT?DHCP????????????????????????????????????????????????????????????????????????

????????

????????????Cable Modem??????????????????????????????????????????WAN??CM?LAN????????????????Cable Modem?????IP????????????????IP???Cable Modem???????

????ISP?????????MAC??????????????????MAC??????????????????????????????????????????