to at least two (2) of their DNS servers, and would be listed as the authoritative server
This creates a secure link between each recursive and authoritative server
, preventing malicious DNS responses from poisoning the recursive server's cache and protecting all of the participating ISP's customers.
Customers enjoy the full DNSSEC solution, including both real-time DNSSEC signing for authoritative server
responses and high performance DNSSEC client validation for end-to-end protection.
For example, should a DNS response be unavailable from the recursive server's cache, DNS Advantage can rapidly secure a response from the locally trusted UltraDNS authoritative server
on the same physical and secure network.
This would be both a change in the authoritative server
and a change in the maintenance routine - who does the additions and deletions - which is obviously a powerful position and one currently coveted by NSI.
When a DNS client requests a DNS record, it can verify that the record received is identical to the record on the authoritative server
An authoritative server
is one that has responsibility for a domain.
When a user enters a URL from those domains into a web browser or email client, it is looked up in a DNS hierarchy that ends at VeriSign's authoritative servers
Root servers are a critical part of the Internet's Domain Name System (DNS), providing information about authoritative servers
for all Top Level Domains (TLDs) (such as ".
Nominum's DNS servers have been enhanced to optimise the upstream traffic to authoritative servers
around the Internet.
The UltraDNS authoritative servers
deployed within each partner network are functionally identical to those of the public UltraDNS network currently distributed across four continents.
Root servers make available information for finding authoritative servers
for top-level domains; there are several hundred such domains, including "DE," "COM," "ORG," "UK," etc.