Electrical computers and digital processing systems: multicomput – Distributed data processing – Client/server
Reexamination Certificate
2000-07-11
2010-06-08
Ismail, Shawki S (Department: 2455)
Electrical computers and digital processing systems: multicomput
Distributed data processing
Client/server
C709S219000, C709S223000, C709S224000, C709S225000, C709S229000
Reexamination Certificate
active
07734683
ABSTRACT:
The invention relates to a method for providing a DNS server address list from a server1to a client2comprising the steps of: the client2requests an IP address from the server1; and the server1responds by assigning the IP address together with said DNS address list to the client1. In the prior art the order of the DNS server addresses in the list is static, that means that upon any IP request the same list, having the same order of addresses is provided to the client. When the client wants to output a DNS request he starts by asking the first server in the list irrespective as to whether said server may currently be overloaded or has gone down. In these situations time is lost since no response is provided by such a disturbed DNS server to a DNS request and the client has to ask another server in the list. In order to overcome these disadvantages the order of the DNS server addresses in the list is dynamically updated in that the client always knows which of the available DNS servers is currently best appropriated.
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Bergenwall Martin
Zenner Jan
Alston & Bird LLP
Ismail Shawki S
Nokia Corporation
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