29 lines
No EOL
1.9 KiB
Markdown
29 lines
No EOL
1.9 KiB
Markdown
---
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obj: concept
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wiki: https://wikipedia.org/wiki/QUIC
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rfc: https://datatracker.ietf.org/doc/html/rfc9000
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website: https://quicwg.org
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---
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# QUIC
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QUIC is a transport layer protocol developed by Google to improve the performance of web applications by reducing latency. It operates over the User Datagram Protocol ([UDP](UDP.md)) and is designed to provide a more efficient alternative to the traditional Transmission Control Protocol ([TCP](TCP.md)).
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## Key Features
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### 1. **Multiplexing:**
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- QUIC supports multiplexing multiple streams of data within a single connection. This enables parallel processing of data, reducing latency and improving overall performance.
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### 2. **Low Latency:**
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- QUIC is designed to minimize connection establishment and data transfer latency. It achieves this by combining the initial connection handshake with the first data transfer.
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### 3. **Adaptive Congestion Control:**
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- QUIC includes built-in congestion control mechanisms that adapt to network conditions, optimizing data transfer rates while avoiding congestion.
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### 4. **Connection Migration:**
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- QUIC allows for seamless connection migration between different network interfaces, such as switching between Wi-Fi and cellular data, without disrupting the user experience.
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### 5. **Forward Error Correction:**
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- QUIC incorporates forward error correction (FEC) to recover lost or corrupted packets without the need for retransmission. This enhances reliability in unreliable network conditions.
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## QUIC Components
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### 1. **QUIC Transport:**
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- Handles connection establishment, multiplexing, and reliable, in-order delivery of data.
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### 2. **QUIC Crypto:**
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- Responsible for securing the QUIC connection using encryption and authentication. It is based on TLS (Transport Layer Security).
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### 3. **QUIC Loss Detection and Congestion Control:**
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- Manages congestion control and packet loss recovery to ensure optimal data transfer rates. |