说明：  一篇英语论文，详细介绍了SNMP的发展经历，版本与使用方法，但是要求英文要好点哦，否则会错过这么经典的一篇论文哦
(An English paper detailing the development of SNMP experience with the use of versions, but require a better point in English Oh, otherwise they will miss such a classic paper Oh)