A.终端与ISP之间直接传输PPP帧
B.电话线(也称用户线)连接家庭中的ADSLModem
C.从ISP获取账号和密码,账号和密码也称用户名和口令
D.终端接入Internet时启动PPPoE协议
If your computer is connected to a host that is an ISP(Internet Service Provider),you can negotiate with the master of the host that your computer is connected to the Internet as a host rather than a terminal.