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0.0
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Total downloads
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216
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Last update
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August 24, 2010
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Publisher
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Steve Gibson
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License
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Free |
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OS
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Windows
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Size
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0.2 MB
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Description
People use alphabetic domain names, but Internet data packets require numerical Internet IP addresses. So the first step required before anything can be done on the Internet is to lookup the site's or service's domain name to determine its associated Internet IP address. Since nothing can happen until IP addresses are known, the use of slow, overloaded or unreliable DNS servers will get in the way, noticeably slowing down virtually all of your use of the Internet.
Unless you have taken over manual control of the DNS servers your system is using (which, as you'll see, is easy to do), your system will be using the DNS servers that were automatically assigned by your Internet connection provider (your ISP). Since they are likely located close to you on the Internet (since they are provided by your own ISP) they may already be the fastest DNS servers available to you. But they might be in the wrong order (the second one being faster than the first one, and that matters!) or, who knows . . . many people have discovered that all of their own ISP's DNS servers were much slower than other publicly available alternatives on the Internet which were faster and/or more reliable.
This DNS Benchmark will give you visibility into what's going on with your system's currently assigned DNS servers by automatically comparing their performance with many well known publicly available alternatives.
GRC's DNS Benchmark performs a detailed analysis and comparison of the operational performance and reliability of any set of up to 200 DNS nameservers (sometimes also called resolvers) at once. When the Benchmark is started in its default configuration, it identifies all DNS nameservers the user's system is currently configured to use and adds them to its built-in list of publicly available �alternative� nameservers. Each DNS nameserver in the benchmark list is carefully �characterized� to determine its suitability for use as a DNS resolver. This characterization includes testing each nameserver for its �redirection� behavior: whether it returns an error for a bad domain request, or redirects a user's web browser to a commercial marketing-oriented page. While such behavior may be acceptable to some users, others may find this objectionable.
When the benchmark is run, the current performance and apparent reliability of the DNS nameservers the system is currently using is compared among themselves, and also against the current performance and apparent reliability of the benchmark's list of all additional alternative nameservers.
Results are continuously displayed and updated while the benchmark is underway, with a dynamically sorted and scaled bar chart, and a tabular chart display showing the cached, uncached and �dotcom� DNS lookup performance of each nameserver. These values are determined by carefully querying each nameserver for the IP addresses of the top 50 most popular domain names on the Internet and also by querying for nonexistent domains.
Once the benchmark finishes, the results are heuristically and statistically analyzed to present a comprehensive yet simplified and understandable English-language summary of all important findings and conclusions. Based upon these results, users may choose to change the usage order of their system's own resolvers, or, if alternative public nameservers offer superior performance compared with the nameservers currently being used, to switch to one or more alternative nameservers.
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"DNS Benchmark 1.1.3883.0" Features:
The Executable Environment:
* Compatible with all versions of Windows from Windows 95 through Windows 7.
* Compatible with Wine (Windows emulation) running on Linux and Macintosh.
* Hand-coded in 100% pure assembly language for highest precision and smallest size: 154 kbytes.
* Installation-free � nothing to install � just run the small executable file.
(Doesn't change anything or mess-up your system.)
* Lightweight (single packet) automatic and/or manual version checking.
* Task Scheduler compatible for non-UI non-interactive background operation.
* Optional, automatic results logging for fully unattended operation.
* Comprehensive error return codes to support full automation.
Primary Benchmark Features:
* For each of up to 200 DNS nameservers, using the Internet's most popular top-50 domain names, independently measures, charts, statistically analyzes, reports (and optionally exports):
o Cached lookups � the time to return a domain name that is already in the resolver's name cache.
o Uncached lookups � the time to return a sub-domain name that is not already in the resolver's name cache.
o Dotcom lookups � the time to consult the nameserver's chosen dotcom resolver(s) for a dotcom name.
o Reliability � the number of queries not replied to during the benchmark.
* Optionally verifies whether nameservers provide DNS security (DNSSEC) record authentication.
* When using a list of (provided) DNSSEC-signed domains, benchmarks DNSSEC authentication performance.
* Graphs and compares all four benchmark parameters with easy-to-read bar chart.
* On-the-fly hierarchical sorting of performance results by cached (default) or uncached performance.
(Sorting is �hierarchical� because cached is sorted first, followed by uncached, then dotcom.)
* Auto-scaled bar chart that can be manually overridden for chart-to-chart comparison.
* Pop-up value �inspector� (left click in nameserver list) displays precise values on bar chart.
* Detailed tabular result report for non-graphical detailed reporting.
* Full detailed, locale-aware (internationalized), CSV results export.
* Automatic logging to CSV file for long-term background results monitoring and collection.
* Simultaneously compares the performance and reliability of up to 200 DNS nameservers.
* Determines nameserver network name (reverse DNS), ownership, operational status.
* Determines whether nameservers intercept and redirect bad domain names.
* Comprehensive, heuristic �Conclusions� generation summarizes all results and suggests useful system changes, if any, in easily readable English.
* All results are analyzed for statistical significance with a 95% confidence threshold.
* Bottom of tabular data page contains built-in quick-reference �reminder� help.
Additional Power-User & Convenience Features:
* The built-in top-50 domains list is user-replaceable to allow more or less accurate (and statistically significant) operation, and for support of DNSSEC record authentication. (More domains takes longer to run.)
* .INI files containing sets and subsets of nameservers to benchmark can be added, removed, and saved.
* Special �dnsbench.ini� is auto-loaded, if present, to always override built-in nameserver list.
(This supports the use of customizable personal nameserver lists for special applications.)
* At startup, tests for the presence of, and deliberately �triggers�, any outbound-blocking personal firewalls to allow Internet access exceptions to be provided before testing begins.
* Internet connectivity aware � verifies unimpeded Internet connectivity before testing and gracefully handles possible loss of Internet connectivity during testing.
* Bar chart results can be copied to the system clipboard or saved in BMP or compressed PNG format for storage or sharing.
* Built-in self-screen capture to BMP or compressed PNG file.
* All benchmark pages and tabs can be copied to the system clipboard or saved to files as text, rich-text, or images as appropriate.
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DNS Benchmark 1.1.3883.0 Copyright Information
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