| Similarity | Rank | |
|---|---|---|
| tunnelling | 0.875 | 78067 |
| tunnels | 0.769 | 14642 |
| tunnel | 0.731 | 7034 |
| Tunnels | 0.649 | 63839 |
| IPsec | 0.648 | 74526 |
| trenching | 0.646 | 91363 |
| topology | 0.636 | 35361 |
| topologies | 0.634 | 88195 |
| VPNs | 0.630 | 69589 |
| superconducting | 0.625 | 84490 |
| routers | 0.624 | 22931 |
| photonic | 0.624 | 85991 |
| fiber-optic | 0.624 | 65756 |
| encapsulation | 0.620 | 51564 |
| TCP | 0.619 | 17992 |
| traversal | 0.619 | 86337 |
| cryptography | 0.608 | 50408 |
| in-situ | 0.607 | 63645 |
| concentrator | 0.602 | 75283 |
| testbed | 0.601 | 95801 |
| SSH | 0.598 | 30820 |
| topological | 0.597 | 65192 |
| nanotubes | 0.596 | 58295 |
| router | 0.595 | 11461 |
| NAT | 0.594 | 43936 |