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:
Jul. 21, 2020
Filed:
Aug. 07, 2017
Verisign, Inc., Reston, VA (US);
Burton S. Kaliski, Jr., McLean, VA (US);
Shumon Huque, Reston, VA (US);
Eric Osterweil, Fairfax, VA (US);
Frank Scalzo, Leesburg, VA (US);
Duane Wessels, Moscow, ID (US);
Glen Wiley, Goochland, VA (US);
VERISIGN, INC., Reston, VA (US);
Abstract
A resolution resiliency application performs robust domain name system (DNS) resolution. In operation, the resolution resiliency application determines that an authoritative name server that is responsible for a domain name specified in a DNS query is unavailable. In response to determining that the authoritative name server is unavailable, the resolution resiliency application performs operation(s) that modify one or more DNS records stored in a cache based on one or more resiliency policies associated with the authoritative name server. The resolution resiliency application then generates a DNS response to the DNS query based on a DNS record stored in the modified cache. Notably, the disclosed techniques increase the likelihood of providing clients with DNS responses that accurately provide requested information.