6.1
来学习 —— DNS（其实没啥好看的）
功能介绍：通过自定义 DNS 来快速、正确的获取 Domain 的IP。Loon 会根据用户自行设置的 DNS 并发请求，使用响应最快的结果，并且使用 LRU 缓存最近的100个结果
关键词：DNS
BY Loon Tutorial
Mr. Durov launched Telegram in late 2013 with his brother, Nikolai, just months before he was pushed out of VK, the Russian social-media platform he founded. Mr. Durov pitched his new app—funded with the proceeds from the VK sale—less as a business than as a way for people to send messages while avoiding government surveillance and censorship.
To pay the bills, Mr. Durov is issuing investors $1 billion to $1.5 billion of company debt, with the promise of discounted equity if the company eventually goes public, the people briefed on the plans said. He has also announced plans to start selling ads in public Telegram channels as soon as later this year, as well as offering other premium services for businesses and users.
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