cisco2950端口line protocol is down (notconnect)

请问down the line Down the line 是什么意思? line up line down 有什么区别 And it is all right to draw a line down the middle of the ro 华为交换机中出现The line protocol on the interface Vlanif9 has enter Spam buster question:What is the most used Internet protocol 英语翻译The Host Identity Protocol (HIP) [1] is an experimental 英语翻译The Session Initiation Protocol (SIP) is an application Slightly down the line 什么意思 but somewhere down the line如何翻译 they sat down in a (s )line This is a line.