psu.edu Website Information

Daily Unique Visits: 1,082,291

Daily Page Views: 8,658,328

Income Per Day: $8,658

Estimated Value: $9,350,640

This website is located in United States and is using following IP address 128.118.142.105. See the complete list of popular websites hosted in United States.

psu.edu is registered under .EDU top-level domain. Please check other sites in .EDU zone.

Website psu.edu is using the following name servers:

psu-ns.acns.msu.edu
ns1.psu.edu
ns2.psu.edu

and is probably hosted by PENN-STATE - The Pennsylvania State University, US. See the full list of other websites hosted by PENN-STATE - The Pennsylvania State University, US.

The highest website psu.edu position in Alexa rank database was 679 and the lowest rank position was 4195. Current position of psu.edu in Alexa rank database is 1408.

Desktop speed score of psu.edu (60/100) is better than the results of 33.75% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of psu.edu (98/100) is better than the results of 68.65% of other sites and means that the page is mobile-friendly.

Mobile speed score of psu.edu (41/100) is better than the results of 16.55% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

psu.edu Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

psu.edu whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

This Registry database contains ONLY .EDU domains.
The data in the EDUCAUSE Whois database is provided
by EDUCAUSE for information purposes in order to
assist in the process of obtaining information about
or related to .edu domain registration records.

The EDUCAUSE Whois database is authoritative for the
.EDU domain.

A Web interface for the .EDU EDUCAUSE Whois Server is
available at: http://whois.educause.edu

By submitting a Whois query, you agree that this information
will not be used to allow, enable, or otherwise support
the transmission of unsolicited commercial advertising or
solicitations via e-mail. The use of electronic processes to
harvest information from this server is generally prohibited
except as reasonably necessary to register or modify .edu
domain names.

-------------------------------------------------------------

Domain Name: PSU.EDU

Registrant:
Pennsylvania State University
114 USB2
University Park, PA 16802-1013
United States of America

Administrative Contact:
Domain Admin
The Pennsylvania State University
USB2
University Park, PA 16802
United States of America
+1.8148654700
dns-admin@psu.edu

Technical Contact:

The Pennsylvania State University
USB 2
University Park, PA 16802-1013
United States of America
+1.8148654700
dns-tech@psu.edu

Name Servers:
PSU-NS.ACNS.MSU.EDU
NS1.PSU.EDU
NS2.PSU.EDU

Domain record activated: 14-Jul-1986
Domain record last updated: 01-Aug-2018
Domain expires: 31-Jul-2021

psu.edu server information

Servers Location

psu.edu desktop page speed rank

Last tested: 2019-05-01

Desktop Speed Bad

60/100

psu.edu Desktop Speed Test Quick Summary

priority - 38 Optimize images

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priority - 16 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 8 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

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Optimize CSS Delivery of the following:

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priority - 7 Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

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priority - 5 Enable compression

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priority - 5 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:

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https://static.doubleclick.net/instream/ad_status.js (15 minutes)
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https://www.google-analytics.com/analytics.js (2 hours)

priority - 1 Minify JavaScript

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priority - 0 Minify CSS

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psu.edu Desktop Resource Breakdown

Total Resources	103
Number of Hosts	18
Static Resources	72
JavaScript Resources	28
CSS Resources	16

psu.edu mobile page speed rank

Last tested: 2019-04-18

Mobile Speed Bad

41/100

psu.edu Mobile Speed Test Quick Summary

priority - 64 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 8 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 53 Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 521.5KiB (47% reduction).

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priority - 26 Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

http://psu.edu/
http://www.psu.edu/
https://www.psu.edu/

priority - 6 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://static.hotjar.com/c/hotjar-380178.js?sv=5 (60 seconds)
https://syndication.twitter.com/settings (10 minutes)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
https://www.google-analytics.com/gtm/js?id=GTM-MVX…d=496122529.1555642527 (15 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-P3SBL5 (15 minutes)
https://connect.facebook.net/signals/config/198638…9117?v=2.8.47&r=stable (20 minutes)
https://platform.twitter.com/widgets.js (30 minutes)
https://www.google.com/cse/static/style/look/v2/minimalist.css (50 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 5 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 49.8KiB (73% reduction).

Compressing https://www.psu.edu/ could save 47.1KiB (75% reduction).
Compressing https://www.psu.edu/sites/all/modules/contrib/resp…/respond.min.js?pp0sby could save 2.3KiB (51% reduction).
Compressing https://www.youtube.com/iframe_api could save 365B (43% 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 10.8KiB (22% reduction).

priority - 0 Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 4.5KiB (35% reduction).

Minifying https://www.google.com/cse/static/element/d35a6008cf40f285/default+en.css could save 3.8KiB (40% reduction) after compression.
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psu.edu Mobile Resource Breakdown

Total Resources	100
Number of Hosts	20
Static Resources	70
JavaScript Resources	29
CSS Resources	17

psu.edu mobile page usability

Last tested: 2019-04-18

Mobile Usability Good

98/100

psu.edu Mobile Usability Test Quick Summary

priority - 1 Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="https://univer…-state-hotline">Hotline</a> is close to 1 other tap targets.

The tap target <h2 class="block-title">Information for:</h2> is close to 1 other tap targets.

The tap target <a href="//twitter.com/penn_state">penn_state</a> and 1 others are close to other tap targets.
The tap target <a href="//twitter.com/PennStateSIA">@PennStateSIA</a> and 1 others are close to other tap targets.
The tap target <input id="edit-go--2" type="submit" name="op" class="ctools-jump-me…menu-processed"> and 1 others are close to other tap targets.
The tap target <a href="http://psu.jobs/">Employment</a> and 6 others are close to other tap targets.

psu.edu Mobile Resource Breakdown

Total Resources	100
Number of Hosts	20
Static Resources	70
JavaScript Resources	29
CSS Resources	17

psu.edu HTML validation

Errors

Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)

Line: 1 Column: - 2
"...<?xml version="1..."

Legacy doctype. Expected “<!DOCTYPE html>”.

Line: 2 Column: 39 - 103
"...="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd"> <html..."

Attribute “xmlns:og” not allowed here.

Line: 18 Column: 104 - 36
"...fa-1.dtd"> <html xml:lang="en" dir="ltr" xmlns="http://www.w3.org/1999/xhtml" version="HTML+RDFa 1.1" xmlns:og="http://ogp.me/ns#" xmlns:article="http://ogp.me/ns/article#" xmlns:book="http://ogp.me/ns/book#" xmlns:profile="http://ogp.me/ns/profile#" xmlns:video="http://ogp.me/ns/video#" xmlns:product="http://ogp.me/ns/product#" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/terms/" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:sioc="http://rdfs.org/sioc/ns#" xmlns:sioct="http://rdfs.org/sioc/types#" xmlns:skos="http://www.w3.org/2004/02/skos/core#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" xmlns:schema="http://schema.org/"> <head..."

Attribute “xmlns:article” not allowed here.

Attribute “xmlns:book” not allowed here.

Attribute “xmlns:profile” not allowed here.

Attribute “xmlns:video” not allowed here.

Attribute “xmlns:product” not allowed here.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.

Attribute “xmlns:xsd” not allowed here.

Attribute “xmlns:schema” not allowed here.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.

The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.

Line: 19 Column: 37 - 51
"...ema.org/"> <head profile="http://www.w3.org/1999/xhtml/vocab"> <me..."

A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.

Line: 21 Column: 1 - 64
"...utf-8" /> <meta content="IE=edge,chrome=1" http-equiv="X-UA-Compatible" /> <meta..."

A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.

Line: 23 Column: 1 - 111
"...le=no" /> <link href="profiles/psu_profile/themes/psu_main/144.png" sizes="144x144" rel="apple-touch-icon-precomposed" /> <link..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 209 Column: 77 - 146
"...="active"><img src="/profiles/psu_profile/themes/psu/images/psu-logo-color.png"></a> ..."

Element “none” not allowed as child of element “h2” in this context. (Suppressing further errors from this subtree.)

Line: 276 Column: 39 - 44
"...ck-title"><none></h2> ..."

End tag “h2” seen, but there were open elements.

Line: 276 Column: 45 - 49
"...le"><none></h2> ..."

Unclosed element “none”.

Line: 276 Column: 39 - 44
"...ck-title"><none></h2> ..."

Attribute “about” not allowed on element “article” at this point.

Line: 310 Column: 7 - 239
"...x"> <article about="/content/psu-homepage" typeof="sioc:Item foaf:Document" class="node node-homepage node-promoted node-full node-full node-homepage-full node-published node-not-sticky author-admin odd clearfix" id="node-homepage-4998"> ..." Line: 313 Column: 364 - 718
"...tem even"><article about="http://news.psu.edu/story/495332/2017/11/22/academics/alumna%E2%80%99s-gift-supports-research-neurodegenerative-diseases" typeof="sioc:Item foaf:Document" class="node node-article node-teaser node-teaser node-teaser node-article-teaser node-published node-not-promoted node-not-sticky author-sjs144 even clearfix" id="node-article-495332"> ..." Line: 316 Column: 156 - 446
"...tem even"><article about="http://news.psu.edu/photo/495324/2017/11/21/jennifer-divittorio" typeof="sioc:Item foaf:Document" class="node node-image node-teaser node-teaser node-teaser node-image-teaser node-published node-not-promoted node-not-sticky author-sjs144 odd clearfix" id="node-image-495324"> ..." Line: 326 Column: 288 - 638
"...tem even"><article about="http://news.psu.edu/story/495723/2017/11/27/arts-and-entertainment/arboretum-penn-state-host-winter-celebration-dec-8" typeof="sioc:Item foaf:Document" class="node node-article node-teaser node-teaser node-teaser node-article-teaser node-published node-not-promoted node-not-sticky author-ecb16 even clearfix" id="node-article-495723"> ..." Line: 329 Column: 156 - 449
"...tem even"><article about="http://news.psu.edu/photo/495712/2017/11/27/pennharmonics-arboretum" typeof="sioc:Item foaf:Document" class="node node-image node-teaser node-teaser node-teaser node-image-teaser node-published node-not-promoted node-not-sticky author-ecb16 odd clearfix" id="node-image-495712"> ..." Line: 339 Column: 172 - 490
"...tem even"><article about="http://news.psu.edu/gallery/495071/2017/11/18/successful-senior-day" typeof="sioc:Item foaf:Document" class="node node-photo-gallery node-teaser node-teaser node-teaser node-photo_gallery-teaser node-published node-not-promoted node-not-sticky author-pxm16 even clearfix" id="node-photo-gallery-495071"> ..." Line: 345 Column: 182 - 525
"...tem even"><article about="http://news.psu.edu/story/495420/2017/11/28/research/students-partner-create-innovative-apps-mhealth-challenge" typeof="sioc:Item foaf:Document" class="node node-article node-teaser node-teaser node-teaser node-article-teaser node-published node-not-promoted node-not-sticky author-mem502 odd clearfix" id="node-article-495420"> ..." Line: 348 Column: 156 - 458
"...tem even"><article about="http://news.psu.edu/photo/495419/2017/11/21/2017-mhealth-challenge-winners" typeof="sioc:Item foaf:Document" class="node node-image node-teaser node-teaser node-teaser node-image-teaser node-published node-not-promoted node-not-sticky author-mem502 even clearfix" id="node-image-495419"> ..." Line: 358 Column: 294 - 619
"...tem even"><article about="http://news.psu.edu/video/495781/2017/11/27/behrend-episode-12-wintergreen-gorge" typeof="sioc:Item foaf:Document" class="node node-video video-player node-video_teaser node-video-teaser node-video-video-teaser node-published node-not-promoted node-not-sticky author-sco10 odd clearfix" id="node-video-495781"> ..."

Attribute “content” not allowed on element “span” at this point.

Line: 319 Column: 485 - 572
"...div></div><span property="dc:title" content="Jennifer DiVittorio" class="rdf-meta element-hidden"></span..." Line: 323 Column: 19 - 148
"...div></div><span property="dc:title" content="Alumna’s gift supports research on neurodegenerative diseases" class="rdf-meta element-hidden"></span..." Line: 332 Column: 534 - 636
"...div></div><span property="dc:title" content="The Pennharmonics at the Arboretum" class="rdf-meta element-hidden"></span..." Line: 336 Column: 19 - 148
"...div></div><span property="dc:title" content="The Arboretum at Penn State to host winter celebration Dec. 8" class="rdf-meta element-hidden"></span..." Line: 342 Column: 647 - 736
"...y</a></h2><span property="dc:title" content="Successful Senior Day" class="rdf-meta element-hidden"></span..." Line: 351 Column: 556 - 654
"...div></div><span property="dc:title" content="2017 mHealth Challenge Winners" class="rdf-meta element-hidden"></span..." Line: 355 Column: 19 - 150
"...div></div><span property="dc:title" content="Students partner to create innovative apps in mHealth Challenge" class="rdf-meta element-hidden"></span..." Line: 366 Column: 19 - 134
"...div></div><span property="dc:title" content="This is Behrend, Episode 1.2: Wintergreen Gorge" class="rdf-meta element-hidden"></span..." Line: 434 Column: 31 - 111
"...div></div><span property="dc:title" content="PSU Homepage" class="rdf-meta element-hidden"></span..."

Attribute “datatype” not allowed on element “a” at this point.

Line: 322 Column: 187 - 284
"...tem even"><a href="/topic/academics" typeof="skos:Concept" property="rdfs:label skos:prefLabel" datatype="">Academ..." Line: 335 Column: 187 - 297
"...tem even"><a href="/topic/arts-and-entertainment" typeof="skos:Concept" property="rdfs:label skos:prefLabel" datatype="">Arts a..." Line: 354 Column: 187 - 283
"...tem even"><a href="/topic/research" typeof="skos:Concept" property="rdfs:label skos:prefLabel" datatype="">Resear..."

Bad value “455px” for attribute “width” on element “iframe”: Expected a digit but saw “p” instead.

Line: 364 Column: 5 - 400
"...yer"> <iframe title="Embedded video" class="" width="455px" height="260px" src="//www.youtube.com/embed/5b8DH90mZUM?width%3D455px%26amp%3Bheight%3D260px%26amp%3Btheme%3Ddark%26amp%3Bautoplay%3D0%26amp%3Bhd%3D1%26amp%3Brel%3D0%26amp%3Bshowinfo%3D1%26amp%3Bmodestbranding%3D0%26amp%3Biv_load_policy%3D1%26amp%3Bautohide%3D2%26amp%3Benablejsapi%3D1%26amp%3Bwmode%3Dopaque" frameborder="0" allowfullscreen></ifra..."

Bad value “260px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

Bad value “” for attribute “src” on element “img”: Must be non-empty.

Line: 392 Column: 56 - 86
"...nn_state"><img src="" alt="penn_state" /></a> ..." Line: 418 Column: 57 - 88
"...research"><img src="" alt="PSUresearch" /></a> ..."

Bad value “contentInfo” for attribute “role” on element “div”.

Line: 620 Column: 5 - 102
"...-12"> <div class="grid-12 region region-footer-postface" id="region-footer-postface" role="contentInfo"> <di..."

Attribute “alt” not allowed on element “a” at this point.

Line: 627 Column: 3 - 67
"...-logo"> <a href="http://www.psu.edu" title="Penn State" alt="Penn State"> <..."

Warnings

Attribute with the local name “xmlns:og” is not serializable as XML 1.0.

Attribute with the local name “xmlns:article” is not serializable as XML 1.0.

Attribute with the local name “xmlns:book” is not serializable as XML 1.0.

Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.

Attribute with the local name “xmlns:video” is not serializable as XML 1.0.

Attribute with the local name “xmlns:product” is not serializable as XML 1.0.

Attribute with the local name “xmlns:content” is not serializable as XML 1.0.

Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:foaf” is not serializable as XML 1.0.

Attribute with the local name “xmlns:rdfs” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioct” is not serializable as XML 1.0.

Attribute with the local name “xmlns:skos” is not serializable as XML 1.0.

Attribute with the local name “xmlns:xsd” is not serializable as XML 1.0.

Attribute with the local name “xmlns:schema” is not serializable as XML 1.0.

Consider avoiding viewport values that prevent users from resizing documents.

Line: 22 Column: 1 - 122
"...tible" /> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no" /> <link..."

Empty heading.

Line: 276 Column: 15 - 38
"... <h2 class="block-title"><none>..."

Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.

Line: 316 Column: 156 - 446
"...tem even"><article about="http://news.psu.edu/photo/495324/2017/11/21/jennifer-divittorio" typeof="sioc:Item foaf:Document" class="node node-image node-teaser node-teaser node-teaser node-image-teaser node-published node-not-promoted node-not-sticky author-sjs144 odd clearfix" id="node-image-495324"> ..." Line: 313 Column: 364 - 718
"...tem even"><article about="http://news.psu.edu/story/495332/2017/11/22/academics/alumna%E2%80%99s-gift-supports-research-neurodegenerative-diseases" typeof="sioc:Item foaf:Document" class="node node-article node-teaser node-teaser node-teaser node-article-teaser node-published node-not-promoted node-not-sticky author-sjs144 even clearfix" id="node-article-495332"> ..." Line: 329 Column: 156 - 449
"...tem even"><article about="http://news.psu.edu/photo/495712/2017/11/27/pennharmonics-arboretum" typeof="sioc:Item foaf:Document" class="node node-image node-teaser node-teaser node-teaser node-image-teaser node-published node-not-promoted node-not-sticky author-ecb16 odd clearfix" id="node-image-495712"> ..." Line: 326 Column: 288 - 638
"...tem even"><article about="http://news.psu.edu/story/495723/2017/11/27/arts-and-entertainment/arboretum-penn-state-host-winter-celebration-dec-8" typeof="sioc:Item foaf:Document" class="node node-article node-teaser node-teaser node-teaser node-article-teaser node-published node-not-promoted node-not-sticky author-ecb16 even clearfix" id="node-article-495723"> ..." Line: 348 Column: 156 - 458
"...tem even"><article about="http://news.psu.edu/photo/495419/2017/11/21/2017-mhealth-challenge-winners" typeof="sioc:Item foaf:Document" class="node node-image node-teaser node-teaser node-teaser node-image-teaser node-published node-not-promoted node-not-sticky author-mem502 even clearfix" id="node-image-495419"> ..." Line: 345 Column: 182 - 525
"...tem even"><article about="http://news.psu.edu/story/495420/2017/11/28/research/students-partner-create-innovative-apps-mhealth-challenge" typeof="sioc:Item foaf:Document" class="node node-article node-teaser node-teaser node-teaser node-article-teaser node-published node-not-promoted node-not-sticky author-mem502 odd clearfix" id="node-article-495420"> ..." Line: 310 Column: 7 - 239
"...x"> <article about="/content/psu-homepage" typeof="sioc:Item foaf:Document" class="node node-homepage node-promoted node-full node-full node-homepage-full node-published node-not-sticky author-admin odd clearfix" id="node-homepage-4998"> ..."

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).

Line: 263 Column: 48 - 81
"...ible"> <h1 class="title" id="page-title">PSU Ho..."

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psu.edu Ping

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psu.edu TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

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priority - 64 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 8 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 53 Optimize images

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Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

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priority - 6 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:

priority - 5 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 49.8KiB (73% 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 10.8KiB (22% reduction).

priority - 0 Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

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psu.edu HTML validation

Errors

Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)

Legacy doctype. Expected “<!DOCTYPE html>”.

Attribute “xmlns:og” not allowed here.

Attribute “xmlns:article” not allowed here.

Attribute “xmlns:book” not allowed here.

Attribute “xmlns:profile” not allowed here.

Attribute “xmlns:video” not allowed here.

Attribute “xmlns:product” not allowed here.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.