The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2025
Filed:
May. 12, 2022
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Vinothkumar Prabhakaran, Bangalore, IN;
Srikanth Subramanian, Snohomish, WA (US);
Kiran Kumar Venkata Purna Chenna Kesava Vemula, Hyderabad, IN;
Arpan Kumar Gupta, Bangalore, IN;
Aditya Sharma, Gujarat, IN;
Peter Alan Carlin, Seattle, WA (US);
Ivan Dimitrov Pashov, Woodinville, WA (US);
Microsoft Technology Licensing, LLC, Redmond, WA (US);
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.