Enhanced domain name system response caching
US10805417B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2019 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Mar 19, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L67/568
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and systems for enhanced domain name system (DNS) response caching are described. An enhanced DNS response caching method includes receiving a connection request for a fully qualified domain name (FQDN). A DNS client checks a local cache for a cached resolved domain name corresponding to the FQDN and sends 3300 a query to obtain or refresh the cached resolved domain name if a Time to Live parameter is expired or about to expire. In response to receiving a negative response or no response for the query, the DNS client determines whether an enhanced DNS response caching parameter is enabled. If the enhanced DNS response caching parameter is enabled, the DNS client sends an expired cached resolved domain name to process the connection request.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.