tutorabc（原vipabc）、 Golang TutorMeet+ Agenda 1. Development of Live Classroom in Online Education； 2. WebRTC Overview； 3. Why Go？ 4. What is TutorMeet+？ 5. Q&A； 1. Development of Live Classroom in Online high quality service ？ 2、 Overview WebRTC Overview WebRTC Pros： l 1、Convenient & Fast； l 2、Free & Open Source； l 3、From Google； WebRTC Overview WebRTC Cons： u Browser？ u Have to build server guarantee ； u WebRTC is more suitable for 1to1, but 1toMany and Many - toMany are no good； u Native&App developed more difficult； ？ WebRTC Overview WebRTC Overview WebRTC Open Source Server

Firewall Traversal: STUN / TURN / Relaying Transport: ? Introduce WebRTC UDP SDP, ICE, STUN, TURN DTLS SCTP Data Channel Network WebRTC Data Channel 1. Stream Control Transmission Protocol (SCTP) Session Traversal Utilities for NAT (STUN) 6. Traversal Using Relay NAT (TURN) WebRTC Implementations in Rust Lib Runtime webrtc-rs native with tokio web-sys browser Browser Node (WASM) + Server Node (Native) network implementation. Using WebRTC and Chord algorithm. With full WebAssembly (WASM) support. Repo: https://github.com/RingsNetwork/rings-node Connect through WebRTC Route by Chord DHT Rings-node