端口号与Nmap结果分析
1. 实验结果 $ (master)$ nmap xx.xx.xx.xx Starting Nmap 5.51 ( http://nmap.org ) at 2016-04-24 19:19 PDT Nmap scan report for slc09wqk.us.oracle.com (10.245.251.161) Host is up (0.00069s latency). Not shown: 993 closed ports PORT STATE SERVICE 22/tcp open ssh 111/tcp open rpcbind 513/tcp open login 514/tcp open shell 2049/tcp open nfs 3306/tcp open mysql 5989/tcp open wbem-https Nmap done: 1 IP address (1 host up) scanned in 0.07 seconds 2. 总结： （1）端口号的概念：用来标定应用层的程序。数据经过传输层之后，通过端口号找到应用层。 （2）nmap的返回结果：列出目标ip上的开放端口和各个端口上运行的应用层服务协议。 （3）应用层协议介绍： A. rpcbind：NFS服务依赖于它 B. wbem-https（基于web的企业管理）：网络管理协议。 Web Based Enterprise Management is an Industry initiative to provide management of systems， networks， users and applications across multiple vendor environments. WBEM simplifies system management， providing better access to both software and hardware data that is readable by WBEM compliant applications. WBEM has been designed to be compatible with all the major existing management protocols， including SNMP， DMI， and CMIP. WBEM is a DMTF standard.
