51EDU.COM 精品学习网-学习考试资讯-中国专业教育门户和互动营销平台

51edu.com Website Information

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Daily Page Views: 23,032

Income Per Day: $64

Estimated Value: $34,560

51edu.com is registered under .COM top-level domain. Please check other sites in .COM zone.

No name server records were found.

and is probably hosted by CHINANET-SICHUAN-CHENGDU-MAN CHINANET Sichuan province Chengdu MAN network, CN. See the full list of other websites hosted by CHINANET-SICHUAN-CHENGDU-MAN CHINANET Sichuan province Chengdu MAN network, CN.

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51edu.com Alexa Rank

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51edu.com whois

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Domain Name: 51EDU.COM
Registry Domain ID: 86502811_DOMAIN_COM-VRSN
Registrar WHOIS Server: grs-whois.hichina.com
Registrar URL: http://www.net.cn
Updated Date: 2023-07-12T09:12:55Z
Creation Date: 2002-05-12T18:51:11Z
Registry Expiry Date: 2028-05-12T18:51:11Z
Registrar: Alibaba Cloud Computing (Beijing) Co., Ltd.
Registrar IANA ID: 420
Registrar Abuse Contact Email: DomainAbuse@service.aliyun.com
Registrar Abuse Contact Phone: +86.95187
Domain Status: ok https://icann.org/epp#ok
Name Server: DNS23.HICHINA.COM
Name Server: DNS24.HICHINA.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-12T04:05:41Z

51edu.com server information

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51edu.com desktop page speed rank

Last tested: 2019-12-10


Desktop Speed Bad
54/100

51edu.com Desktop Speed Test Quick Summary


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51edu.com Desktop Resource Breakdown

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Number of Hosts15
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51edu.com mobile page speed rank

Last tested: 2017-06-03


Mobile Speed Bad
39/100

51edu.com Mobile Speed Test Quick Summary


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51edu.com Mobile Resource Breakdown

Total Resources96
Number of Hosts24
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51edu.com mobile page usability

Last tested: 2017-06-03


Mobile Usability Bad
58/100

51edu.com Mobile Usability Test Quick Summary


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51edu.com HTML validation

Warnings

The character encoding “gb2312” is not widely supported. Better interoperability may be achieved by using “UTF-8”.

Line: 4 Column: - 70
"......"

Using “gbk” instead of the declared encoding “gb2312”.

Line: 4 Column: - 70
"......"

The “type” attribute is unnecessary for JavaScript resources.

Line: 11 Column: 1 - 101
"...e.css" /> <script type="text/javascript" src="/templates/51edu/skins/51edu/2013/common/js/jquery-1.8.3.min.js"></scri..." Line: 12 Column: 1 - 98
"...</script> <script type="text/javascript" src="/templates/51edu/skins/51edu/2013/common/js/koala.min.1.5.js"></scri..." Line: 972 Column: 1 - 31
"...> </div> <script type="text/javascript"> Qfast..." Line: 1091 Column: 1 - 31
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".../script> <script type="text/javascript"> docu..." Line: 1113 Column: 1 - 102
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"...</script> <script type="text/javascript" src="/templates/51edu/skins/51edu/2013/common/js/com.js"></scri..."

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

Line: 377 Column: 362 - 401
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".../span></a><img src="/images/new.gif" border="0" /></div>..." Line: 511 Column: 242 - 281
".../span></a><img src="/images/new.gif" border="0" /></div>..." Line: 1069 Column: 31 - 102
"...内所有信息<br/><img src="http://adm.baidu.com/img/vip_1.gif" border="0" alt="百度广告管家" /> </p>..."

The “type” attribute for the “style” element is not needed and should be omitted.

Line: 993 Column: 1 - 23
"... 结束 --> <style type="text/css"> #sit..."

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Line: 1079 Column: 1 - 92
"...户全站统计--> <script src="http://s19.cnzz.com/stat.php?id=2918556&web_id=2918556" language="JavaScript"></scrip..." Line: 1083 Column: 1 - 92
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This document appears to be written in Simplified Chinese. Consider adding “lang="zh-hans"” (or variant) to the “html” start tag.

Line: 2 Column: 122 - 43
"...onal.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head..."

Errors

Legacy encoding “gbk” used. Documents must use UTF-8.

Line: Column: -
"......"

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Line: 1 Column: 1 - 121
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html..."

Bad value “text/html; charset=gb2312” for attribute “content” on element “meta”: “charset=” must be followed by “utf-8”.

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"..."> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <titl..."

Element “title” not allowed as child of element “head” in this context. (Suppressing further errors from this subtree.)

Line: 30 Column: 1 - 7
".../script> <title>精品学习网首..."

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

Line: 37 Column: 62 - 111
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"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 144 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 176 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 212 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 247 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 279 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 311 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 347 Column: 9 - 98
"...> <img src="http://www.51edu.com/templates/51edu/skins/51edu/2013/common/images/xiala.png"/> ..." Line: 377 Column: 362 - 401
"...">读书笔记</a><img src="/images/new.gif" border="0" /></span..." Line: 501 Column: 238 - 277
".../span></a><img src="/images/new.gif" border="0" /></div>..." Line: 506 Column: 239 - 278
".../span></a><img src="/images/new.gif" border="0" /></div>..." Line: 511 Column: 242 - 281
".../span></a><img src="/images/new.gif" border="0" /></div>..." Line: 824 Column: 79 - 176
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Element “p” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Line: 98 Column: 7 - 9
"...ul> <p> ..." Line: 141 Column: 7 - 9
"...ul> <p> ..." Line: 173 Column: 7 - 9
"...ul> <p> ..." Line: 208 Column: 7 - 9
"...ul> <p> ..." Line: 244 Column: 7 - 9
"...ul> <p> ..." Line: 275 Column: 7 - 9
"...ul> <p> ..." Line: 307 Column: 7 - 9
"...ul> <p> ..." Line: 344 Column: 7 - 9
"...ul> <p> ..."

Stray end tag “ul”.

Line: 398 Column: 1 - 5
"...li> </ul> </ul> ..." Line: 414 Column: 1 - 5
"...li> </ul> </ul> ..." Line: 430 Column: 1 - 5
"...li> </ul> </ul> ..."

Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Line: 500 Column: 9 - 27
"...> <div class="gkzx1"> <div ..." Line: 505 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 510 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 515 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 521 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 526 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 531 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 536 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 541 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 546 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 553 Column: 10 - 28
"... <div class="gkzx1"> <div ..." Line: 560 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 567 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 574 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 581 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 588 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 595 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 602 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 609 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 616 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 623 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 630 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 640 Column: 9 - 27
"...> <div class="gkzx1"> <div ..." Line: 647 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 654 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 661 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 668 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 675 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 682 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 689 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 696 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 703 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 710 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 717 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 727 Column: 8 - 26
"...l> <div class="gkzx1"> <div ..." Line: 734 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 741 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 748 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 755 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 762 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 769 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 776 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 783 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 790 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 797 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 804 Column: 1 - 19
"...v> </div> <div class="gkzx1"> <div ..." Line: 1019 Column: 1 - 25
"...淘宝联盟</li> <div style="clear:both;"></div>..."

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

Line: 841 Column: 13 - 82
"... <a href="javascript:void(0)" hidefocus="true" target="_self" class=""><i>1</..." Line: 842 Column: 13 - 82
"... <a href="javascript:void(0)" hidefocus="true" target="_self" class=""><i>2</..." Line: 843 Column: 13 - 89
"... <a href="javascript:void(0)" hidefocus="true" target="_self" class="current"><i>3</..." Line: 844 Column: 13 - 82
"... <a href="javascript:void(0)" hidefocus="true" target="_self" class=""><i>4</..."

Stray end tag “div”.

Line: 970 Column: 1 - 6
"... </div> </div> <scr..."

Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Line: 993 Column: 1 - 23
"... 结束 --> <style type="text/css"> #sit..."

CSS: Parse Error.

Line: 1010 Column: - 123
"...-align:center}} </style> <!--..."

No “li” element in scope but a “li” end tag seen.

Line: 1019 Column: 32 - 36
"...h;"></div></li> </ul>..."

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

Line: 1051 Column: 1 - 6
".../ul> <dl> </div> <!--f..."

Unclosed element “dl”.

Line: 1050 Column: 1 - 4
"...li> </ul> <dl> </div..."

Attribute “data” not allowed on element “script” at this point.

Line: 1101 Column: 1 - 114
"...且仅有一份--> <script type="text/javascript" id="bdshare_js" data="type=slide&amp;img=1&amp;uid=10026&amp;mini=1&amp;pos=right"></scri..."

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51edu.com Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.


51edu.com 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.