LKG client cache for DNS resiliency
US12255867B2 · kind B2 · utility
0Cited by
7References
20Claims
0Family size
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Key dates
| Filing date | May 12, 2022 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | May 26, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/40
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for implementing a last known good (LKG) client-side cache for DNS resiliency are disclosed. A first DNS request is submitted to a DNS server. A first DNS resolution that resolves an IP address for a domain name is received. A service stores the first DNS resolution in an LKG cache residing on the local host. A second DNS request is sent, where the second DNS request again requests to resolve the same domain name. In response to determining that a second DNS resolution for the second DNS request has not been received, the service obtains the IP address for the domain name from the LKG cache.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.