jr-central.co.jp website information.
jr-central.co.jp domain name is registered by .JP top-level domain registry. See the other sites registred in .JP domain zone.
No name server records were found.
and probably website jr-central.co.jp is hosted by FACEBOOK - Facebook, Inc., US web hosting company. Check the complete list of other most popular websites hosted by FACEBOOK - Facebook, Inc., US hosting company.
According to Alexa traffic rank the highest website jr-central.co.jp position was 12366 (in the world). The lowest Alexa rank position was 16279. Now website jr-central.co.jp ranked in Alexa database as number 15390 (in the world).
Website jr-central.co.jp Desktop speed measurement score (27/100) is better than the results of 6.92% of other sites shows that the page desktop performance can be improved.
jr-central.co.jp Mobile usability score (89/100) is better than the results of 31.01% of other sites and means that the page is mobile-friendly.
Mobile speed measurement score of jr-central.co.jp (7/100) is better than the results of 0.95% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
Weekly Rank Report
| Date | Rank | Change |
|---|---|---|
| Nov-17-2024 | N/A | N/A |
| Nov-16-2024 | 15,390 | -144 |
| Nov-15-2024 | 15,246 | 13 |
| Nov-14-2024 | 15,259 | 72 |
| Nov-13-2024 | 15,331 | 0 |
| Nov-12-2024 | 15,331 | 0 |
| Nov-11-2024 | 15,331 | 0 |
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jr-central.co.jp Rank History
Alexa can identify the popularity of a website as well as its competitors. It is important for website owners and bloggers to know their Alexa ranking because it shows how many visitors have viewed their web page. It gives them a clear idea of how popular their website is on the internet and the ranking of their competitors.
jr-central.co.jp whois
WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system, but is also used for a wider range of other information.
jr-central.co.jp server information
Servers Location
| IP Address |
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| Country |
|---|
jr-central.co.jp desktop page speed rank
Last tested: 2019-02-01
Desktop Speed
Bad
27/100
jr-central.co.jp Desktop Speed Test Quick Summary
priority - 219 Optimize images
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priority - 26 Eliminate render-blocking JavaScript and CSS in above-the-fold content
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priority - 24 Leverage browser caching
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priority - 2 Prioritize visible content
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priority - 1 Minify JavaScript
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priority - 0 Minify CSS
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jr-central.co.jp Desktop Resources
| Total Resources | 127 |
| Number of Hosts | 8 |
| Static Resources | 50 |
| JavaScript Resources | 14 |
| CSS Resources | 4 |
jr-central.co.jp Desktop Resource Breakdown
jr-central.co.jp mobile page speed rank
Last tested: 2019-02-01
Mobile Speed
Bad
7/100
jr-central.co.jp Mobile Speed Test Quick Summary
priority - 412 Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 3.9MiB (71% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_010.jpg could save 426.3KiB (83% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_010.jpg could save 423.1KiB (83% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_006.jpg could save 413.6KiB (73% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_006.jpg could save 385.3KiB (74% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_013.jpg could save 311.5KiB (77% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_013.jpg could save 301.1KiB (77% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_001.jpg could save 249.5KiB (73% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_019.jpg could save 249.4KiB (73% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_001.jpg could save 241.4KiB (72% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_005.jpg could save 208KiB (81% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_019.jpg could save 190KiB (72% reduction).
Compressing https://jr-central.co.jp/_img/ind_mln_img_01.jpg could save 127.4KiB (57% reduction).
Compressing https://jr-central.co.jp/_img/ind_mln_img_03.jpg could save 92.4KiB (56% reduction).
Compressing https://jr-central.co.jp/_img/ind_mln_img_02.jpg could save 76.2KiB (59% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_005.jpg could save 66.7KiB (57% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_004.jpg could save 54.5KiB (72% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_008.jpg could save 54KiB (36% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_008.jpg could save 53.1KiB (36% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_003.jpg could save 32.9KiB (55% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_005.jpg could save 31.2KiB (49% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_002.jpg could save 15.3KiB (53% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_001.jpg could save 14.9KiB (56% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_des_rad.png could save 1.8KiB (36% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ico_blank.png could save 964B (88% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ico_blank_w.png could save 936B (89% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_01.png could save 576B (26% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_01.png could save 468B (38% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_02b.png could save 420B (37% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_mor_ico_01.png could save 211B (30% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ser_tab_ico_01.png could save 194B (21% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ser_sta_dis_ico_01.png could save 188B (27% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_des_che.png could save 186B (12% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_foo_rol_ico.png could save 118B (35% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_010.jpg could save 423.1KiB (83% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_006.jpg could save 413.6KiB (73% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_006.jpg could save 385.3KiB (74% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_013.jpg could save 311.5KiB (77% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_013.jpg could save 301.1KiB (77% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_001.jpg could save 249.5KiB (73% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_019.jpg could save 249.4KiB (73% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_001.jpg could save 241.4KiB (72% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_005.jpg could save 208KiB (81% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_019.jpg could save 190KiB (72% reduction).
Compressing https://jr-central.co.jp/_img/ind_mln_img_01.jpg could save 127.4KiB (57% reduction).
Compressing https://jr-central.co.jp/_img/ind_mln_img_03.jpg could save 92.4KiB (56% reduction).
Compressing https://jr-central.co.jp/_img/ind_mln_img_02.jpg could save 76.2KiB (59% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_005.jpg could save 66.7KiB (57% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_004.jpg could save 54.5KiB (72% reduction).
Compressing https://jr-central.co.jp/_data/_img/pc/main_vis_008.jpg could save 54KiB (36% reduction).
Compressing https://jr-central.co.jp/_data/_img/sp/main_vis_008.jpg could save 53.1KiB (36% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_003.jpg could save 32.9KiB (55% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_005.jpg could save 31.2KiB (49% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_002.jpg could save 15.3KiB (53% reduction).
Compressing https://jr-central.co.jp/_data/_img/ban_001.jpg could save 14.9KiB (56% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_des_rad.png could save 1.8KiB (36% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ico_blank.png could save 964B (88% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ico_blank_w.png could save 936B (89% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_01.png could save 576B (26% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_01.png could save 468B (38% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_02b.png could save 420B (37% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_mor_ico_01.png could save 211B (30% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ser_tab_ico_01.png could save 194B (21% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_ser_sta_dis_ico_01.png could save 188B (27% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_des_che.png could save 186B (12% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_foo_rol_ico.png could save 118B (35% reduction).
priority - 104 Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources and 4 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
Remove render-blocking JavaScript:
https://jr-central.co.jp/_assets/_config/config.js
Optimize CSS Delivery of the following:
https://jr-central.co.jp/_assets/_css/reset.css
https://fonts.googleapis.com/earlyaccess/notosansjp.css
https://jr-central.co.jp/_assets/_css/sp/standard.css?v=1549023905896
https://jr-central.co.jp/_css/sp/standard.css?v=1549023905896
https://fonts.googleapis.com/earlyaccess/notosansjp.css
https://jr-central.co.jp/_assets/_css/sp/standard.css?v=1549023905896
https://jr-central.co.jp/_css/sp/standard.css?v=1549023905896
priority - 43 Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://jr-central.co.jp/_assets/_config/config.js (expiration not specified)
https://jr-central.co.jp/_assets/_css/reset.css (expiration not specified)
https://jr-central.co.jp/_assets/_img/_des_che.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_des_rad.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_foo_rol_ico.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_ft_ico.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_mor_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_02b.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_lan_cap_ico.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_log.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_sea_but_ico.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_tab_ico_01.png (expiration not specified)
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https://jr-central.co.jp/_assets/_img/_hea_tab_ico_02.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_tab_ico_03.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/_ico_blank.png (expiration not specified)
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https://jr-central.co.jp/_assets/_img/_ser_sta_dis_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_ser_tab_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_ex.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_logo_02.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_news.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_railway.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_shinkansen.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_zairaisen.svg (expiration not specified)
https://jr-central.co.jp/_assets/_javascript/vendor/lib.js (expiration not specified)
https://jr-central.co.jp/_data/_img/ban_001.jpg (expiration not specified)
https://jr-central.co.jp/_data/_img/ban_002.jpg (expiration not specified)
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https://jr-central.co.jp/_img/ind_ex_bg.png (expiration not specified)
https://jr-central.co.jp/_img/ind_ex_ico_01.png (expiration not specified)
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https://jr-central.co.jp/_img/ind_ex_log_express.svg (expiration not specified)
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https://jr-central.co.jp/_img/ind_mln_img_01.jpg (expiration not specified)
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https://rsv.dga.jp/s/jrcentral/search_tool_n3.js (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-MQNJVM (15 minutes)
https://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://jr-central.co.jp/_assets/_css/reset.css (expiration not specified)
https://jr-central.co.jp/_assets/_img/_des_che.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_des_rad.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_foo_rol_ico.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_ft_ico.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_mor_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_hea_bp_01_sea_tab_ico_01.png (expiration not specified)
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https://jr-central.co.jp/_assets/_img/_hea_log.png (expiration not specified)
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https://jr-central.co.jp/_assets/_img/_hea_tab_ico_01.png (expiration not specified)
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https://jr-central.co.jp/_assets/_img/_ico_blank.png (expiration not specified)
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https://jr-central.co.jp/_assets/_img/_ser_sta_dis_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/_ser_tab_ico_01.png (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_ex.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_logo_02.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_news.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_railway.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_shinkansen.svg (expiration not specified)
https://jr-central.co.jp/_assets/_img/ico_zairaisen.svg (expiration not specified)
https://jr-central.co.jp/_assets/_javascript/vendor/lib.js (expiration not specified)
https://jr-central.co.jp/_data/_img/ban_001.jpg (expiration not specified)
https://jr-central.co.jp/_data/_img/ban_002.jpg (expiration not specified)
https://jr-central.co.jp/_data/_img/ban_003.jpg (expiration not specified)
https://jr-central.co.jp/_data/_img/ban_004.jpg (expiration not specified)
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https://jr-central.co.jp/_data/_img/pc/main_vis_001.jpg (expiration not specified)
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https://jr-central.co.jp/_img/ind_ex_bg.png (expiration not specified)
https://jr-central.co.jp/_img/ind_ex_ico_01.png (expiration not specified)
https://jr-central.co.jp/_img/ind_ex_ico_02.png (expiration not specified)
https://jr-central.co.jp/_img/ind_ex_log_express.svg (expiration not specified)
https://jr-central.co.jp/_img/ind_ex_log_smart.svg (expiration not specified)
https://jr-central.co.jp/_img/ind_mln_img_01.jpg (expiration not specified)
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https://jr-central.co.jp/_img/ind_mln_img_03.jpg (expiration not specified)
https://rsv.dga.jp/s/jrcentral/search_tool_n3.js (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-MQNJVM (15 minutes)
https://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
priority - 8 Prioritize visible content
Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
Only about 2% of the final above-the-fold content could be rendered with the full HTML response.
Click to see the screenshot with only the HTML response:
priority - 2 Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 21.3KiB (60% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_logo_02.svg could save 2.9KiB (56% reduction).
Compressing https://jr-central.co.jp/_data/main_vis.json could save 2.6KiB (82% reduction).
Compressing https://rsv.dga.jp/s/jrcentral/search_tool_n3.js could save 2.4KiB (72% reduction).
Compressing https://jr-central.co.jp/news/_api/news.json?_=1549023905901 could save 2KiB (71% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_railway.svg could save 1.6KiB (55% reduction).
Compressing https://jr-central.co.jp/_data/banner.json could save 1.1KiB (75% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_03.svg could save 1.1KiB (72% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_shinkansen.svg could save 1.1KiB (52% reduction).
Compressing https://jr-central.co.jp/_img/ind_ex_log_smart.svg could save 993B (48% reduction).
Compressing https://jr-central.co.jp/topics/_api/topics.json?_=1549023905902 could save 965B (61% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_01.svg could save 799B (54% reduction).
Compressing https://jr-central.co.jp/_img/ind_ex_log_express.svg could save 769B (47% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_zairaisen.svg could save 747B (52% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_news.svg could save 646B (50% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_sea_but_ico.svg could save 528B (46% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_02.svg could save 488B (46% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_ex.svg could save 444B (50% reduction).
Compressing https://jr-central.co.jp/service-info/_xml/service-info.xml?_=1549023905900 could save 187B (42% reduction).
Compressing https://jr-central.co.jp/_data/main_vis.json could save 2.6KiB (82% reduction).
Compressing https://rsv.dga.jp/s/jrcentral/search_tool_n3.js could save 2.4KiB (72% reduction).
Compressing https://jr-central.co.jp/news/_api/news.json?_=1549023905901 could save 2KiB (71% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_railway.svg could save 1.6KiB (55% reduction).
Compressing https://jr-central.co.jp/_data/banner.json could save 1.1KiB (75% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_03.svg could save 1.1KiB (72% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_shinkansen.svg could save 1.1KiB (52% reduction).
Compressing https://jr-central.co.jp/_img/ind_ex_log_smart.svg could save 993B (48% reduction).
Compressing https://jr-central.co.jp/topics/_api/topics.json?_=1549023905902 could save 965B (61% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_01.svg could save 799B (54% reduction).
Compressing https://jr-central.co.jp/_img/ind_ex_log_express.svg could save 769B (47% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_zairaisen.svg could save 747B (52% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_news.svg could save 646B (50% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_sea_but_ico.svg could save 528B (46% reduction).
Compressing https://jr-central.co.jp/_assets/_img/_hea_tab_ico_02.svg could save 488B (46% reduction).
Compressing https://jr-central.co.jp/_assets/_img/ico_ex.svg could save 444B (50% reduction).
Compressing https://jr-central.co.jp/service-info/_xml/service-info.xml?_=1549023905900 could save 187B (42% reduction).
priority - 1 Minify JavaScript
Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 10.9KiB (27% reduction).
Minifying https://jr-central.co.jp/_assets/_javascript/common.js?_=1549023905893 could save 4.5KiB (32% reduction) after compression.
Minifying https://jr-central.co.jp/_javascript/index.js?_=1549023905894 could save 1.9KiB (26% reduction) after compression.
Minifying https://jr-central.co.jp/_assets/_module/header.js?_=1549023905897 could save 1.8KiB (19% reduction) after compression.
Minifying https://jr-central.co.jp/_assets/_javascript/acces…rch.js?_=1549023905903 could save 1.5KiB (31% reduction) after compression.
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priority - 0 Minify CSS
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jr-central.co.jp Mobile Resources
| Total Resources | 133 |
| Number of Hosts | 8 |
| Static Resources | 59 |
| JavaScript Resources | 14 |
| CSS Resources | 4 |
jr-central.co.jp Mobile Resource Breakdown
jr-central.co.jp mobile page usability
Last tested: 2019-02-01
Mobile Usability
Good
89/100
jr-central.co.jp Mobile Usability Test Quick Summary
priority - 10 Configure the viewport
Your page specifies a fixed-width desktop viewport. Use a responsive viewport to allow your page to render properly on all devices.
Configuring a viewport specifying width=device-width instead of width=750 will allow your page to adapt for devices of various widths. This may require additional work to adapt your styling for smaller screens.
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jr-central.co.jp Ping
Ping is a networking utility tool to test if a particular host is reachable. It is a diagnostic that checks reachability of a host on an Internet Protocol (IP) network. In a computer network, a ping test is a way of sending messages from one host to another. Aside from checking if the host is connected to a network, ping also gives indicators of the reliability and general speed of the connection.
jr-central.co.jp TRACEROUTE
Traceroute is a network diagnostic tool used to track the pathway taken by a packet on an IP network from source to destination. Traceroute also records the time taken for each hop the packet makes during its route to the destination. Traceroute uses ICMP (Internet Control Message Protocol) echo packets with variable time to live values. The response time of each hop is calculated. To guarantee accuracy, each hop is queried multiple times (usually three times) to better measure the response of that particular hop.