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:
Jun. 12, 2018
Filed:
Mar. 19, 2002
Stuart D. Cheshire, San Jose, CA (US);
Stuart D. Cheshire, San Jose, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Domain Name System (DNS) Queries and DNS Responses both use the same packet format. The DNS packet format includes a header section, a question section, an answer section, an authority record section and an additional record section. In conventional DNS Queries, the header section and the question section are used; the answer section, authority record section and additional record section are empty. In the present invention, when issuing a query, the client places the question in the question section as usual, and places all the answers it already knows into the (previously empty) answer section. When receiving a query, a responder checks to make sure that the answer it is about to give is not already included in the answer section. If the answer is listed in the answer section of the query, it means that the client already has that information, and doesn't need to be told again.