WWW.NSF.GOV 网站分析

基本信息

搜索引擎收录信息

必应:
谷歌:

页面信息

标题:
NSF - National Science Foundation
长度: 33 字符; 最佳长度: 10 ~ 60 字符
Meta 描述信息:
NSF is an independent federal agency that supports science and engineering in all 50 states and U.S. territories.
长度: 113 字符; 最佳长度: 50 ~ 160 字符
Meta 关键词:
长度: 0 字符; 最佳长度: 10 ~ 255 字符

The length of your meta keywords seems to be outside the recommended range. Ideally, a meta keywords should be between 10 and 255 characters, including spaces.

Meta keywords are a specific type of meta tag that appear in the HTML code of a web page. They provide information to search engines about the topic of the page. Meta keywords were once used to help rank web pages in search engine results. However, due to the abuse by webmasters and marketers, Google claims to have stopped using them more than a decade ago. Despite this, there are still reasons to consider using meta keywords:

  • Uncertain Impact on Google's Algorithm: While Google devalued meta keywords, it is uncertain if they were entirely removed from its ranking algorithm. Google keeps its ranking algorithms top secret to deter people from gaming the system.
  • Other Search Engines and CMS: Other search engines like Yandex, Baidu, and Naver may still use meta keywords. Additionally, some internal CMS search systems, such as SOLR and Algolia, also utilize the meta keywords tag.

Best practices for Meta Keywords

  • Relevance is Key: It is crucial to choose keywords that accurately reflect the content of your page.
  • Keep it Limited: It is generally recommended not to exceed more than 10 meta keywords for a single page. Also, the content length should not exceed 255 characters (including spaces).
  • Consider Long-Tail Keywords: Long-tail keywords are more specific and longer phrases that target a niche audience. These keywords can be highly effective in driving targeted traffic to your website.

Remember, meta keywords are just one aspect of search engine optimization (SEO), and search engines now place less emphasis on them compared to other factors. However, by following these best practices, you can still optimize your meta keywords effectively and improve the visibility of your web pages.

H1标签:
Innovation Anywhere, Opportunity Everywhere
长度: 43 字符; 最佳长度: 10 ~ 255 字符

建站技术

服务器:
Apache
SSL 安全:
有效
robots.txt:
不可用
XML 站点地图:
不可用
Gzip 压缩:
有效
favicon.ico:
不可用

HTTP Head 分析

HTTP 协议采用了请求与响应模型,通过 HTTP Header 定义了 HTTP 传输过程中的必要参数。 浏览器(例如 Internet Explorer, Google Chrome, Firefox 等)并不会显示 HTTP header 字段的内容,下面是网站 www.nsf.gov 的 HTTP header 信息:
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Server: Apache
X-Content-Type-Options: nosniff
X-Drupal-Dynamic-Cache: MISS
Content-Language: en
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
Last-Modified: Sun, 08 Jun 2025 17:36:22 GMT
X-Generator: Drupal 10 (https://www.drupal.org)
X-Drupal-Cache: HIT
Content-Encoding: gzip
X-XSS-Protection: 1; mode=block
Strict-Transport-Security: max-age=31536000; includeSubdomains
Date: Sun, 08 Jun 2025 18:36:23 GMT
Cache-Control: max-age=1800, public, stale-if-error=1800, stale-while-revalidate=300
Expires: Sun, 19 Nov 1978 05:00:00 GMT
ETag: "1749404182-gzip"
Vary: Accept-Encoding,Cookie
X-Cache: Hit from cloudfront
Via: 1.1 2210e9afbcd8d797188be728cde2bece.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: PHL51-P2
X-Amz-Cf-Id: vCegNhdZKCRRc2EtGpEfJfB7AYFV7nMql0cNUkjVO3hkzR9rYPW-Wg==
Age: 792
Vary: Origin

DNS 记录分析

DNS 域名系统(Domain Name System,缩写)是 Internet 的一项基础服务。它作为将域名和IP地址相互映射的一个分布式数据库,能够使人更方便地访问互联网。nsf.gov 当前共有 30 项 DNS 记录。
主机 类型 IP/目标 生存时间 扩充信息
nsf.govA9488
nsf.govNS2809
nsf.govNS2809
nsf.govNS2809
nsf.govSOA10800expire: 2419200
serial: 354114
nsf.govMX900pri: 20
nsf.govMX900pri: 40
nsf.govMX900pri: 30
nsf.govMX900pri: 10
nsf.govTXT
ShNmcKFFVegkbrLv/ZWIayChihj/6ex8I90IpRSXQBkn1Tsx45u+8mCFusWDhJGae2kekkYKk9ufjRoo3NfcEg==
120
nsf.govTXT
dtm-domain-verification=hhhDP2wLLViJtESmc7Ta3p4TebJnbXRN6QgO17iUa84
120
nsf.govTXT
120
nsf.govTXT
_e2bgk5emxy2urhc02hbj3qdfio78rre
120
nsf.govTXT
pardot392062=becfd95f24258e3fc13fcd1a1e1180d727c56b4be4d260083f9cd9b5c9b6c796
120
nsf.govTXT
amazonses:DamZDYghwrc36rQV5r31e65CG+IMCDnwWTHIYOBhJXw=
120
nsf.govTXT
ZOOM_verify_e-wubZa8RVevvUsuV9EDjg
120
nsf.govTXT
amazonses:Xen13otWmW+wYsvK3OOWVwVweAySkrZvw4bkN6B8DS0=
120
nsf.govTXT
pardot392062=053f2d10e7f4c1b927a691aaad73b9b3e7907aa4c63f6eb1213ac7d56751e6f2
120
nsf.govTXT
atlassian-domain-verification=ZxoQv8eEes8m9y/CQit7XinKIZ2stkuJYobPGxyfb2Vawpwx53WuHXUn1jXwbOSH
120
nsf.govTXT
v=spf1 ip4:128.150.5.20/26 ip4:66.77.7.161/32 ip4:66.77.15.226/32 ip4:128.150.130.200/31 ip4:15.200.32.0/24 ip4:128.150.225.100 ip4:65.123.16.240/28 ip4:65.127.216.64/27 ip4:3.220.190.25 ip4:3.221.22.181 ip4:35.153.165.194 ip4:18.235.253.50 ip4:23.23.239.161 ip4:52.37.117.118 ip4:35.162.59.88 ip6:2620:10f:6001:5::20/121 include:spf.constantcontact.com include:spf.protection.outlook.com include:_spf.salesforce.com include:app.aventri.com include:amazonses.com ~all
120
nsf.govTXT
pardot392062=05fbda79c7018dd8f27b04ea0fd2610c38a298a7f67d08e2ff95fa3c8942dbb2
120
nsf.govTXT
amazonses:WZKkPkyla+989ZOi22G9mHBRQ5+AFckOtwOzHCrGjw0=
120
nsf.govTXT
cisco-ci-domain-verification=31282763ef63b65d7fbe70a761e5bb83dbb03877bd585e5d6f9ce91b988d419a
120
nsf.govTXT
amazonses:CJeGepY8qu0s5Rvnp0WG10sbMjRq+6TZ7fiY6bMqpiI=
120
nsf.govTXT
ZOOM_verify_vIOQy6f2SQWeZ2977lDjcQ
120
nsf.govTXT
have-i-been-pwned-verification=4f69051491297bd79446011a4ad80df8
120
nsf.govTXT
amazonses:KT2VTwGZXoLetXUWN88a5yYAGXBROcTpc2ZnkOfLDJs=
120
nsf.govTXT
google-site-verification=vA4yjJZWJbPcVjZIBv-mY5xH88T2uNrEQTfsITLtt4s
120
nsf.govTXT
cisco-ci-domain-verification=668a8a48d9102045865249e856890fb34daf8e2b743f21f0c47df1819f8c46db
120
nsf.govAAAA
2620:10f:6002:221::244
1893