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2. OpenDNS - Wikipedia

   en.wikipedia.org/wiki/OpenDNS

   OpenDNS is an American company providing Domain Name System (DNS) resolution services—with features such as phishing protection, optional content filtering, and DNS lookup in its DNS servers—and a cloud computing security product suite, Umbrella, designed to protect enterprise customers from malware, botnets, phishing, and targeted online attacks.

3. Cisco - Wikipedia

   en.wikipedia.org/wiki/Cisco

   Cisco Systems, Inc. (using the trademark Cisco) is an American multinational digital communications technology conglomerate corporation headquartered in San Jose, California. Cisco develops, manufactures, and sells networking hardware, software, telecommunications equipment and other high-technology services and products.

4. DomainKeys Identified Mail - Wikipedia

   en.wikipedia.org/wiki/DomainKeys_Identified_Mail

   A receiving SMTP server wanting to verify uses the domain name and the selector to perform a DNS lookup. For example, given the example signature above: the d tag gives the author domain to be verified against, example.net ; the s tag the selector, brisbane. The string _domainkey is a fixed part of the specification.

5. Domain Name System - Wikipedia

   en.wikipedia.org/wiki/Domain_Name_System

   A DNS name server is a server that stores the DNS records for a domain; a DNS name server responds with answers to queries against its database. The most common types of records stored in the DNS database are for start of authority ( SOA ), IP addresses ( A and AAAA ), SMTP mail exchangers (MX), name servers (NS), pointers for reverse DNS ...

6. DNS blocking - Wikipedia

   en.wikipedia.org/wiki/DNS_blocking

   DNS blocking. Domain Name System blocking, or DNS blocking / filtering, is a strategy for making it difficult for users to locate specific domains or websites on the Internet. It was first introduced in 1997 as a means to block spam email from known malicious IP addresses. [1]

7. List of security hacking incidents - Wikipedia

   en.wikipedia.org/wiki/List_of_security_hacking...

   February: The Internet Software Consortium proposes the use of DNSSEC (Domain Name System Security Extensions) to secure DNS servers. May 19: The seven members of the hacker think tank known as L0pht testify in front of the US congressional Government Affairs committee on "Weak Computer Security in Government".

8. List of Internet top-level domains - Wikipedia

   en.wikipedia.org/wiki/List_of_Internet_top-level...

   This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet.A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database.

9. Domain name - Wikipedia

   en.wikipedia.org/wiki/Domain_name

   In general, a domain name identifies a network domain or an Internet Protocol (IP) resource, such as a personal computer used to access the Internet, or a server computer. Domain names are formed by the rules and procedures of the Domain Name System (DNS). Any name registered in the DNS is a domain name.