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'''Root Zone''' refers to the highest level of the [[DNS|Domain Name System]] (DNS) structure. It contains the names and the numeric IP addresses for all the top level domain names such as the [[gTLD]]s ([[.com]], [[.net]], [[.org]]), including [[new gTLD]]s ([[.xyz]], [[.club]], [[.google]]), as well [[CcTLD]]s ([[.us]], [[.uk]], [[.ar]]) and [[IDN]]s ([[.在线]], [[.عرب]], [[.संगठन]]) in the root zone file.<ref>[http://www.isoc.org/briefings/019/ www.isoc.org]</ref>

'''Root Zone''' refers to the highest level of the [[DNS|Domain Name System]] (DNS) structure. It contains the names and the numeric IP addresses for all the top level domain names such as the [[gTLD]]s ([[.com]], [[.net]], [[.org]]), including [[new gTLD]]s ([[.xyz]], [[.club]], [[.google]]), as well [[CcTLD]]s ([[.us]], [[.uk]], [[.ar]]) and [[IDN]]s ([[.在线]], [[.عرب]], [[.संगठन]]) in the root zone file.<ref>[http://www.isoc.org/briefings/019/ www.isoc.org]</ref>

The DNS root zone contains over 11,000 gTLDs, CcTLDs and IDNs that are delegated to the Root Zone Database.<ref>

The DNS root zone contains over 11,000 gTLDs, CcTLDs and IDNs that are delegated to the Root Zone Database.<ref>

[http://www.iana.org/domains/root/db IANA Root Zone Database]</ref>

[http://www.iana.org/domains/root/db IANA Root Zone Database]</ref>

==Root Zone Management Process== <!--T:3-->

==Root Zone Management Process==  

The [[NTIA|National Telecommunications Information Administration]] (NTIA), [[ICANN]], [[Verisign]] and the [[Root Server Operators]] play significant roles in the management and process of the root zone.  

The [[NTIA|National Telecommunications Information Administration]] (NTIA), [[ICANN]], [[Verisign]] and the [[Root Server Operators]] play significant roles in the management and process of the root zone.  

NTIA is an agency under the United States [[DOC|Department of Commerce]], which represents the federal government in a contract entered in with ICANN and Verisign, which grants the organizations separate functions in managing the performance of the root zone. NTIA is responsible in reviewing and approving whatever changes that need to be implemented within the root zone.<ref>[http://www.icann.org/en/committees/dns-root/root-scaling-study-report-31aug09-en.pdf www.icann.org]</ref>

NTIA is an agency under the United States [[DOC|Department of Commerce]], which represents the federal government in a contract entered in with ICANN and Verisign, which grants the organizations separate functions in managing the performance of the root zone. NTIA is responsible in reviewing and approving whatever changes that need to be implemented within the root zone.<ref>[http://www.icann.org/en/committees/dns-root/root-scaling-study-report-31aug09-en.pdf www.icann.org]</ref>

ICANN is the operator of the [[IANA|Internet Assigned Numbers Authority]] (IANA), which is responsible for the day-to-day management of the DNS root zone. IANA assigns the operators of the top level domain and ensures the maintenance and the administrative details of the TLDs.<ref>[http://tools.ietf.org/html/rfc1591 RFC 1591]</ref><ref> [http://www.iana.org/domains/root/ Root Zone Management]</ref> It is also responsible for the coordination of the [[IP|Internet Protocol]] (IP) and [[ASN|Autonomous System Numbers]] (ASN) to the [[RIR|Regional Internet Registries]] (RIR).

ICANN is the operator of the [[IANA|Internet Assigned Numbers Authority]] (IANA), which is responsible for the day-to-day management of the DNS root zone. IANA assigns the operators of the top level domain and ensures the maintenance and the administrative details of the TLDs.<ref>[http://tools.ietf.org/html/rfc1591 RFC 1591]</ref><ref> [http://www.iana.org/domains/root/ Root Zone Management]</ref> It is also responsible for the coordination of the [[IP|Internet Protocol]] (IP) and [[ASN|Autonomous System Numbers]] (ASN) to the [[RIR|Regional Internet Registries]] (RIR).

Verisign, and formerly [[Network Solutions]], serves as the root zone administrator under a cooperative agreement entered with the United States government; this has been in effect since 1998.

Verisign, and formerly [[Network Solutions]], serves as the root zone administrator under a cooperative agreement entered with the United States government; this has been in effect since 1998.

The [[Root Server Operators]]' primary role is to make sure that the operations of the root zone is always accurate, available, reliable and secure. There are thirteen Root Server Operators in the database of the root zone, which include:<ref>[http://www.isoc.org/briefings/019/ Root Server Operators]</ref>

The [[Root Server Operators]]' primary role is to make sure that the operations of the root zone is always accurate, available, reliable and secure. There are thirteen Root Server Operators in the database of the root zone, which include:<ref>[http://www.isoc.org/briefings/019/ Root Server Operators]</ref>

* A/J - [[Verisign]] Global Registry Services

* A/J - [[Verisign]] Global Registry Services

* B - [[Information Sciences Institute]]

* B - [[Information Sciences Institute]]

* M - [[WIDE Project]]

* M - [[WIDE Project]]

==Root Zone Operational Changes== <!--T:9-->

==Root Zone Operational Changes==  

On February 3, 2009, the [[ICANN Board]] enumerated the upcoming operational changes to be implemented in the [[DNS]] root zone, such as the addition of [[IPv6]] records to the root, new [[gTLD|generic top level domains]] (gTLDs), new [[IDN|Internationalized Domain Names]], and the implementation of [[DNSSEC]]. In connection to the anticipated root zone operational changes, the Board requested  the [[SSAC|Security and Stability Advisory Committee]] (SSAC) and [[RSSAC|Root Server System Advisory Committee]] (RSSAC) to conduct a joint study to analyze its impact to the stability and security to the DNS root server system. Furthermore, the Board requested both the committees to identify the capacity and scaling of the root server system to be able to solve any  technical and operational challenges that might take place when the proposed changes are implemented. Some [[ICANN]] senior technical staff were also to take part in the study.<ref>[http://www.icann.org/en/minutes/prelim-report-03feb09.htm ICANN Special Board Meeting]</ref>

On February 3, 2009, the [[ICANN Board]] enumerated the upcoming operational changes to be implemented in the [[DNS]] root zone, such as the addition of [[IPv6]] records to the root, new [[gTLD|generic top level domains]] (gTLDs), new [[IDN|Internationalized Domain Names]], and the implementation of [[DNSSEC]]. In connection to the anticipated root zone operational changes, the Board requested  the [[SSAC|Security and Stability Advisory Committee]] (SSAC) and [[RSSAC|Root Server System Advisory Committee]] (RSSAC) to conduct a joint study to analyze its impact to the stability and security to the DNS root server system. Furthermore, the Board requested both the committees to identify the capacity and scaling of the root server system to be able to solve any  technical and operational challenges that might take place when the proposed changes are implemented. Some [[ICANN]] senior technical staff were also to take part in the study.<ref>[http://www.icann.org/en/minutes/prelim-report-03feb09.htm ICANN Special Board Meeting]</ref>

==Root Scaling Study Report== <!--T:10-->

==Root Scaling Study Report==  

The SSAC, RSSAC and ICANN Staff responded to the request of the ICANN Board by creating a Scaling Steering Group to conduct the study. On September 7, 2009, a report entitled: Report on the Impact on the DNS Root System of Increasing the Size and Volatility of the Root Zone was submitted by the Root Scaling Study Team for the Scaling Steering Group with the following findings and recommendations:<ref>[http://www.icann.org/en/committees/dns-root/root-scaling-study-report-31aug09-en.pdf Root Scaling Study Report]</ref>

The SSAC, RSSAC and ICANN Staff responded to the request of the ICANN Board by creating a Scaling Steering Group to conduct the study. On September 7, 2009, a report entitled: Report on the Impact on the DNS Root System of Increasing the Size and Volatility of the Root Zone was submitted by the Root Scaling Study Team for the Scaling Steering Group with the following findings and recommendations:<ref>[http://www.icann.org/en/committees/dns-root/root-scaling-study-report-31aug09-en.pdf Root Scaling Study Report]</ref>

* Any of the proposed changes has an effect to the growth of the root zone. The study team suggested that it is best to add or make changes to the root zone with a large or sudden impact. Gradual changes can be added at later stages.

* Any of the proposed changes has an effect to the growth of the root zone. The study team suggested that it is best to add or make changes to the root zone with a large or sudden impact. Gradual changes can be added at later stages.

* Adding IPv6 records to the root zone will add glue records for the name server of every TLD. This means that the amount of data increases per TLD in the root zone and the number of changes per TLD will also increase each year.

* Adding IPv6 records to the root zone will add glue records for the name server of every TLD. This means that the amount of data increases per TLD in the root zone and the number of changes per TLD will also increase each year.

The Root Scaling Study Team also found that the proposed changes to the root also affect the end-system applications of the Internet such as the web browsers, intermediary “middleboxes” that perform traffic shaping, firewall, and caching functions; and [[ISP]]s that manage the DNS services provided to internet users.

The Root Scaling Study Team also found that the proposed changes to the root also affect the end-system applications of the Internet such as the web browsers, intermediary “middleboxes” that perform traffic shaping, firewall, and caching functions; and [[ISP]]s that manage the DNS services provided to internet users.

The root zone does not censor queries for any reason. Any user's queries are responded to regardless of their intentions.

The root zone does not censor queries for any reason. Any user's queries are responded to regardless of their intentions.

==References== <!--T:12-->

==References==  

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[[Category:Glossary]]

[[Category:Glossary]]

[[Category:Articles with Chinese]]

[[Category:Articles with Chinese]]