snmp中各版本的mib都有，以及各个端口所对应的程序和功能-snmp in both the version of the mib and the port corresponding to the various procedures and functions

walk snmp 的实现原理和mib 的介绍walk snmp mib realization principle and the introduction-walk snmp mib realization principle and the introduction walk snmp mib realization principle and the introduction