【摘要】 LXI总线是一项以计算机网络为基础的总线技术,目前已经发展成熟的网络技术为LXI总线仪器的发展奠定了坚实的基础,利用LXI总线可以很容易地构建分布式的测试系统。针对复杂而多变的测试系统,最新版的LXI协议规定了VXI-11和mDNS两种网络发现协议[5],专门处理测试系统中的仪器发现问题。本文分析了VXI-11协议的速度慢、效率低等不足,重点介绍了mDNS协议的主机名发现和服务发现功能,并且详细讲解了mDNS数据包中PTR、SRV、TXT等记录的意义,最后给出了程序设计流程图和最终实现的效果。更多还原

【Abstract】 LXI Bus is a computer network-based technology,developed network technology has laid a solid foundation for the development of LXI bus instrument,the use of LXI bus can easily build a distributed testing system.For complex and variable test system,the latest version of the LXI protocol provides two kinds of network discovery protocol— VXI-11 and mDNS to deal specifically with that discovery the instruments in the test system.This paper analyzes the VXI-11 protocol of the slow,low efficiency,focusing on the mDNS protocol that the host name and service discovery,and gave a detailed significance of mDNS packet PTR,SRV,TXT and other records,and finally give to the outline of the process flow chart and ultimately results.更多还原