Application Layer Protocol Negotiation (ALPN)
ALPN provides a way for client's to specify the application protocols they support.Top Client ALPNs
| Rank | ALPN | Unique Fingerprints | % Fingerprints | Connections | % Connections |
|---|---|---|---|---|---|
| 1 | h2 http/1.1 |
22674178 | 35.62% | 13699820383 | 67.02% |
| 2 | 276823 | 0.43% | 3259245121 | 15.94% | |
| 3 | http/1.1 |
803714 | 1.26% | 3097391972 | 15.15% |
| 4 | grpc-exp h2 |
54 | 0.00% | 91528895 | 0.45% |
| 5 | h2 h2-fb http/1.1 |
34 | 0.00% | 85209933 | 0.42% |
| 6 | h2 h2-16 h2-15 h2-14 spdy/3.1 spdy/3 http/1.1 |
153 | 0.00% | 77316136 | 0.38% |
| 7 | h2 |
445 | 0.00% | 59803563 | 0.29% |
| 8 | 39895487 | 62.67% | 39895972 | 0.20% | |
| 9 | spdy/3.1 spdy/3 http/1.1 |
57 | 0.00% | 11780674 | 0.06% |
| 10 | h2 spdy/3.1 http/1.1 |
258 | 0.00% | 6060354 | 0.03% |
| 11 | http/1.1 h2 |
4693 | 0.01% | 3457419 | 0.02% |
| 12 | http/0.9 http/1.0 http/1.1 spdy/1 spdy/2 spdy/3 h2 h2c hq |
25 | 0.00% | 1673821 | 0.01% |
| 13 | apns-security-v3 apns-pack-v1 |
15 | 0.00% | 1581105 | 0.01% |
| 14 | http/1.1 http/1.0 |
17 | 0.00% | 1223725 | 0.01% |
| 15 | h2 h2-fb |
4 | 0.00% | 1061885 | 0.01% |
| 16 | hq h2c h2 spdy/3 spdy/2 spdy/1 http/1.1 http/1.0 http/0.9 |
15 | 0.00% | 839684 | 0.00% |
| 17 | http/1.1 https/1.1 |
2 | 0.00% | 714606 | 0.00% |
| 18 | http/0.9 http/1.0 spdy/1 spdy/2 spdy/3 h2c hq |
5 | 0.00% | 335872 | 0.00% |
| 19 | hq h2c spdy/3 spdy/2 spdy/1 http/1.0 http/0.9 |
5 | 0.00% | 334574 | 0.00% |
| 20 | h2 http/1.1 http/1.0 |
17 | 0.00% | 211185 | 0.00% |
Selected ALPNs (Server Hello)
| Rank | ALPN | Fingerprints | % Fingerprints | Connections | % Connections |
|---|---|---|---|---|---|
| 1 | 5419081 | 78.83% | 8783252108 | 82.15% | |
| 2 | h2 | 783353 | 11.39% | 981480119 | 9.18% |
| 3 | http/1.1 | 655864 | 9.54% | 923076053 | 8.63% |
| 4 | grpc-exp | 26 | 0.00% | 954140 | 0.01% |
| 5 | apns-pack-v1:4096:4096 | 5 | 0.00% | 90045 | 0.00% |
| 6 | x-amzn-mqtt-ca | 23 | 0.00% | 60686 | 0.00% |
| 7 | x-amzn-http-ca | 7 | 0.00% | 6578 | 0.00% |
| 8 | http/1.1 | 4 | 0.00% | 5832 | 0.00% |
| 9 | bep-relay | 3 | 0.00% | 1626 | 0.00% |
| 10 | ncp | 2 | 0.00% | 1503 | 0.00% |
| 11 | mqtt | 2 | 0.00% | 531 | 0.00% |
| 12 | h2 | 1 | 0.00% | 260 | 0.00% |
| 13 | fbvp | 4 | 0.00% | 260 | 0.00% |
| 14 | h2-14 | 3 | 0.00% | 167 | 0.00% |
| 15 | http/1.0 | 3 | 0.00% | 124 | 0.00% |
| 16 | spdy/3.1 | 1 | 0.00% | 9 | 0.00% |
Popular ALPNs supported by clients
| Rank | ALPN | Fingerprints | % Fingerprints | Connections | % Connections |
|---|---|---|---|---|---|
| 1 | http/1.1 | 23484163 | 36.89% | 16986868986 | 83.10% |
| 2 | h2 | 22680437 | 35.63% | 14027731223 | 68.63% |
| 3 | spdy/3.1 | 1105 | 0.00% | 95794445 | 0.47% |
| 4 | spdy/3 | 718 | 0.00% | 92605139 | 0.45% |
| 5 | grpc-exp | 90 | 0.00% | 91538822 | 0.45% |
| 6 | h2-fb | 108 | 0.00% | 86274787 | 0.42% |
| 7 | h2-14 | 371 | 0.00% | 77583639 | 0.38% |
| 8 | h2-16 | 271 | 0.00% | 77374190 | 0.38% |
| 9 | h2-15 | 266 | 0.00% | 77372483 | 0.38% |
| 10 | http/1.0 | 117 | 0.00% | 4790528 | 0.02% |
| 11 | spdy/2 | 418 | 0.00% | 3414934 | 0.02% |
| 12 | spdy/1 | 299 | 0.00% | 3358830 | 0.02% |
| 13 | h2c | 97 | 0.00% | 3355261 | 0.02% |
| 14 | http/0.9 | 83 | 0.00% | 3354692 | 0.02% |
| 15 | hq | 64 | 0.00% | 3347876 | 0.02% |
| 16 | apns-security-v3 | 16 | 0.00% | 1589157 | 0.01% |
| 17 | apns-pack-v1 | 16 | 0.00% | 1581919 | 0.01% |
| 18 | https/1.1 | 2 | 0.00% | 714606 | 0.00% |
| 19 | quic | 32 | 0.00% | 219120 | 0.00% |
| 20 | x-amzn-mqtt-ca | 30 | 0.00% | 133499 | 0.00% |