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 |
160215 | 0.25% | 24809627227 | 92.82% |
| 2 | http/1.1 |
119964 | 0.19% | 5077038979 | 18.99% |
| 3 | 289484 | 0.45% | 4746838759 | 17.76% | |
| 4 | grpc-exp h2 |
52 | 0.00% | 151139273 | 0.57% |
| 5 | h2 h2-fb http/1.1 |
34 | 0.00% | 143242414 | 0.54% |
| 6 | h2 |
555 | 0.00% | 96090719 | 0.36% |
| 7 | h2 h2-16 h2-15 h2-14 spdy/3.1 spdy/3 http/1.1 |
151 | 0.00% | 90399713 | 0.34% |
| 8 | spdy/3.1 spdy/3 http/1.1 |
59 | 0.00% | 14242076 | 0.05% |
| 9 | h2 spdy/3.1 http/1.1 |
254 | 0.00% | 8030952 | 0.03% |
| 10 | http/1.1 h2 |
7244 | 0.01% | 4945112 | 0.02% |
| 11 | http/1.1 https/1.1 |
7 | 0.00% | 3470988 | 0.01% |
| 12 | apns-security-v3 apns-pack-v1 |
15 | 0.00% | 2897517 | 0.01% |
| 13 | http/0.9 http/1.0 http/1.1 spdy/1 spdy/2 spdy/3 h2 h2c hq |
28 | 0.00% | 2227962 | 0.01% |
| 14 | http/1.1 http/1.0 |
38 | 0.00% | 1542270 | 0.01% |
| 15 | hq h2c h2 spdy/3 spdy/2 spdy/1 http/1.1 http/1.0 http/0.9 |
16 | 0.00% | 1132766 | 0.00% |
| 16 | h2 h2-fb |
5 | 0.00% | 1130736 | 0.00% |
| 17 | h2 http/1.1 http/1.0 |
27 | 0.00% | 501227 | 0.00% |
| 18 | hq h2c spdy/3 spdy/2 spdy/1 http/1.0 http/0.9 |
6 | 0.00% | 445842 | 0.00% |
| 19 | http/0.9 http/1.0 spdy/1 spdy/2 spdy/3 h2c hq |
6 | 0.00% | 445722 | 0.00% |
| 20 | x-amzn-mqtt-ca |
35 | 0.00% | 242391 | 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 | 289003 | 0.45% | 30157955440 | 112.83% |
| 2 | h2 | 169221 | 0.26% | 25309580421 | 94.69% |
| 3 | grpc-exp | 92 | 0.00% | 151152033 | 0.57% |
| 4 | h2-fb | 114 | 0.00% | 144376715 | 0.54% |
| 5 | spdy/3.1 | 1148 | 0.00% | 113421982 | 0.42% |
| 6 | spdy/3 | 765 | 0.00% | 109269289 | 0.41% |
| 7 | h2-14 | 380 | 0.00% | 90695280 | 0.34% |
| 8 | h2-16 | 275 | 0.00% | 90472250 | 0.34% |
| 9 | h2-15 | 271 | 0.00% | 90470151 | 0.34% |
| 10 | http/1.0 | 163 | 0.00% | 6511023 | 0.02% |
| 11 | spdy/2 | 477 | 0.00% | 4620625 | 0.02% |
| 12 | h2c | 109 | 0.00% | 4500183 | 0.02% |
| 13 | spdy/1 | 357 | 0.00% | 4471014 | 0.02% |
| 14 | http/0.9 | 93 | 0.00% | 4466429 | 0.02% |
| 15 | hq | 70 | 0.00% | 4456817 | 0.02% |
| 16 | https/1.1 | 7 | 0.00% | 3470988 | 0.01% |
| 17 | apns-security-v3 | 16 | 0.00% | 2907673 | 0.01% |
| 18 | apns-pack-v1 | 16 | 0.00% | 2898597 | 0.01% |
| 19 | quic | 37 | 0.00% | 321130 | 0.00% |
| 20 | x-amzn-mqtt-ca | 35 | 0.00% | 242391 | 0.00% |