dns-sd._udp.<domain>. 域名发现 本质和MDNS同
DNS Service Discovery is a way of using standard DNS programming interfaces, servers, and packet formats to browse the network for services.
If you think the picture below looks a lot like the old Macintosh AppleTalk “Chooser”, that’s no coincidence. As we move away from AppleTalk to an all-IP world, we don’t want to have to give up the convenience and ease of use that made AppleTalk popular, and made AppleTalk continue to be popular long after it should rightfully have been retired.
DNS Service Discovery is compatible with, but not dependent on, Multicast DNS.
Domain enumeration
When a user browes a domain he gets results based on what services are advestised in the
domain he browses. On a local basis it is pretty logical what domain is being browsed,
but in a wider perspective, something is needed to select a domain to browse. Of course
the user could do this, but that contradicts the zero configuration bit in zero configuration.
This leads us to Domain Enumeration. DNS-SD performs five queries of Domain
Enumeration:
• Where are interesting domains to browse
b._dns-sd._udp.<domain>.
• What is the recommended domain in that list
db._dns-sd._udp.<domain>.
• Where are recommended places to register my services
r._dns-sd._udp.<domain>.
• What is the recommended domain in that list of places
dr._dns-sd._udp.<domain>.
• Are there any additional domains in addition to the local domain (for legacy users)
17
lb._dns-sd._udp.<domain>.
By learning pieces of information about the network topology from the configuration it
has been assigned, (DHCP, DNS, Netmask etc) the client builds its DNS-SD Domain Enumeration
queries and checks for answers to the questions above.
参考:http://www.dns-sd.org/
相关文章
- 顶级域名 一级域名 二级域名 三级域名[通俗易懂]
- 利用企业微信免费申请com域名的图文教程
- 好物分享36-较省钱的域名、服务器购买及备案方案
- 「 【特别说明】域名变更&本站计划下线关闭amp/mip页面 」
- 域名接入clb,443端口健康检查异常,域名访问502;域名直接解析到后端rs访问正常
- PHP,JavaScript 获取当前域名、判断网址协议是否为 HTTPS
- DNSPod新春特惠:10元域名限时折扣
- DV 多域名 SSL证书
- 域名是什么?
- 域名对SEO的重要影响(必看)
- Linux下域名转换IP地址的简易方式(linux域名转ip)
- 域名设置指南:Linux 快速入门(linux怎么设置域名)
- BT资源网站YTS失去了对其域名的控制权
- 更改深入理解Oracle域名更改过程(oracle域名)
- 如何在Linux上实现域名绑定IP?(linux域名绑定ip)
- 解决MySQL一直卡顿的有效方法 GT(mysql一直 gt)
- 无数据库的详细域名查询程序PHP版(2)
- 星外在多台受控服务器的情况下,临时域名的解析办法
- 注册新网互联的域名所有出错的代码解说
- 域名和cookie问题(域名后缀)
- php过滤html中的其他网站链接的方法(域名白名单功能)