QUIC
Quick UDP Internet Connections
The next Gen of layer 4 Protocol
Preview
Quick UDP Internet Connections
QUIC
Quick Connections
Internet
UDP
HTTP/2?
TCP?
Before we know QUIC..
What is UDP
What is UDP
What is UDP
Stupid TCP!
-
TCP 3-way 핸드쉐이크는 왕복 시간 한번 만큼 레이턴시를 발생시킨다.
-
TCP Slow-Start는 커넥션이 새로 만들어질 때 항상 발생한다.
-
TCP 흐름제어와 혼잡 제어는 모든 커넥션의 처리량을 조절한다.
- TCP 처리량은 현재 혼잡 윈도 크기에 의해 결정된다.
1다음은 2고 그다음은 3이야.
1다음 3하고 2하면 안되냐고?
응. 안되~
Stupid TCP!
Stupid TCP!
Very slow TCP
HOL Blocking
Head of Line Blocking
???: Work! IETF!
HTTP/2!!
Key of HTTP/2
Form of HTTP/1
TLS/TCP Stack
Easy migration!!
Age of HTTPS
What is QUIC
Before QUIC
HTTP/2가 2년도 안되었는데 Google은
QUIC을 개발하고 제안하였는가..
Goal of QUIC
- Adapted "NOW"
- Upgrade "latency" of network process
- Solve HOL Problem
- Solve TCP congestion control
- Secure MORE than TLS
- Work well in mobile network (Wifi <=> Cellular)
QUIC
QUIC Packet
QUIC
Packet Header
QUIC Packet
Packet Header Flag
QUIC Packet
Version negotiation packet
public reset packet
For Server
==> connection Terminate
Life of a QUIC Connection
Connection Establishment
Data Transfer
끗!
QUIC
HTTP
HTTP2
QUIC
EXPLORER
TRAFFIC
Too fast... GOOGLE!!
Reference
chrome://net-internals/#events&q=type:QUIC_SESSION%20is:active