DNS service availability Clause Samples
The DNS service availability clause defines the minimum level of uptime and reliability that a DNS provider must maintain for its services. Typically, this clause specifies a percentage of guaranteed uptime (such as 99.9%) and may outline procedures for monitoring, reporting outages, and remedies if the service falls below the agreed threshold. Its core function is to ensure that users can reliably access domain name resolution services, thereby minimizing disruptions to online operations and reducing the risk of downtime for websites and applications.
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DNS service availability. Refers to the ability of the group of listed-as-authoritative name servers of a particular domain name (e.g., a TLD), to answer DNS queries from DNS probes. For the service to be considered available at a particular moment, at least, two of the delegated name servers registered in the DNS must have successful results from “DNS tests” to each of their public-DNS registered “IP addresses” to which the name server resolves. If 51% or more of the DNS testing probes see the service as unavailable during a given time, the DNS service will be considered unavailable. DNS name server availability. Refers to the ability of a public-DNS registered “IP address” of a particular name server listed as authoritative for a domain name, to answer DNS queries from an Internet user. All the public DNS-registered “IP address” of all name servers of the domain name being monitored shall be tested individually. If 51% or more of the DNS testing probes get undefined/unanswered results from “DNS tests” to a name server “IP address” during a given time, the name server “IP address” will be considered unavailable.
DNS service availability. Service availability as it applies to the DNS Service refers to the ability of the Nameservers, as a group, to resolve a DNS query from an Internet user. The committed Performance Specification is 99.999% measured in Monthly Timeframes.
DNS service availability. Service availability as it applies to the DNS Service refers to the ability of the Nameservers, as a group, to resolve a DNS query from an Internet user. The committed Performance Specification is 99.999% measured in Monthly Timeframes. Performance Level. At any time at which it is available, each Nameserver (including a cluster of Nameservers addressed at a shared IP address) MUST be able to handle a load of queries for DNS data that is three times the measured daily peak (averaged over the Monthly Timeframe) of such requests on the most loaded Nameserver. Cross-Network Nameserver Performance Requirements. The committed Performance Specification for cross-network Nameserver performance is a measured Round-trip time of less than 300 ms and measured packet loss of fewer than 10%. Whois Service Availability. The committed Performance Specification for Whois Service is 99.4% measured in Monthly Timeframes. Whois Service Performance Level. The Whois Service will, on average, be able to handle 50 queries per second. Whois Service Response Times. The Whois Service will have a maximum whois query response time of 1.5 seconds. Failure of the Whois Service to respond to three
DNS service availability. Refers to the ability of the group of listed-‐as-‐authoritative name servers of a particular domain name (e.g., a TLD), to answer DNS queries from DNS probes. For the service to be considered available at a particular moment, at least, two of the delegated name servers registered in the DNS must have successful results from “DNS tests” to each of their public-‐DNS registered “IP addresses” to which the name server resolves. If 51% or more of the DNS testing probes see the service as unavailable during a given time, the DNS service will be considered unavailable.
DNS service availability. DNS Service Availability refers to the ability of the group of listed-as-authoritative name servers of a particular registered domain name (e.g., a TLD), to answer DNS queries from DNS probes. For the service to be considered available at a particular moment, at least, two of the delegated name servers registered in the DNS must have successful results from “DNS tests” to each of their public-DNS registered “IP addresses” to which the name server resolves. If 51% or more of the DNS testing probes see the service as unavailable during a given time, the DNS service will be considered unavailable
DNS service availability. Service availability as it applies to the DNS Service refers to the ability of the Nameservers, as a group, to resolve a DNS query from an Internet user. The committed Performance Specification is 99.999% measured in Monthly Timeframes. Performance Level. At any time at which it is available, each Nameserver (including a cluster of Nameservers addressed at a shared IP address) MUST be able to handle a load of queries for DNS data that is three times the measured daily peak (averaged over the Monthly Timeframe) of such requests on the most loaded Nameserver. Cross-Network Nameserver Performance Requirements. The committed Performance Specification for cross-network Nameserver performance is a measured Round-trip time of under 300 ms and measured packet loss of under 10%. Cross- network Nameserver performance measurements will be conducted by ICANN at times of it’s choosing, in the following manner: Whois Service Availability. The committed Performance Specification for Whois Service is 99.4% measured in Monthly Timeframes. Whois Service Performance Level. The Whois Service will, on average, be able to handle 50 queries per second. Whois Service Response Times. The Whois Service will have a maximum whois query response time of 1.5 seconds. Failure of the Whois Service to respond to three (3) consecutive rcPing commands initiated by the Registry Operator at regular intervals within such maximum processing time shall mean the Whois Service is considered unavailable.
DNS service availability. Service availability as it applies to the DNS Service refers to the ability of the Nameservers, as a group, to resolve a DNS query from an Internet user. The committed Performance Specification is 99.999% measured in Monthly Timeframes. Performance Level. At any time at which it is available, each Nameserver (including a cluster of Nameservers addressed at a shared IP address) MUST be Cross-Network Nameserver Performance Requirements. The committed Performance Specification for cross-network Nameserver performance is a measured Round-trip time of under 300 ms and measured packet loss of under 10%. Cross-network Nameserver performance measurements will be conducted by ICANN at times of it’s choosing, in the following manner: Whois Service Availability. The committed Performance Specification for Whois Service is 99.4% measured in Monthly Timeframes. Whois Service Performance Level. The Whois Service will, on average, be able to handle 50 queries per second. Whois Service Response Times. The Whois Service will have a maximum whois query response time of 1.5 seconds. Failure of the Whois Service to respond to three (3) consecutive rcPing commands initiated by the Registry Operator at regular intervals within such maximum processing time shall mean the Whois Service is considered unavailable.
DNS service availability. Refers to the ability of the group of listed-as-authoritative name servers of a particular domain name (e.g., a TLD), to answer DNS queries from an Internet userDNS probes. For the service to be considered available at some point in timea particular moment, at least, two of the delegated name servers registered in the DNS must have defined successful results from “DNS tests” to each of their public-DNS registered “IP addresses“” to which the name server resolves over both (UDP and TCP) transports. If 51% or more of the DNS testing probes see the service as unavailable over any of the transports (UDP or TCP) during a given time, the DNS service will be considered unavailable.
DNS service availability. DNS Service Availability Objective Definition Target Calculation of DNS Service Availability Calculation of DNS Server Availability