www.class-central.com 網站分析

www.class-central.com - 基本信息

服務器:
nginx
IP:
未知
城市:
未知

www.class-central.com - 搜索引擎收錄信息

百度:
Bing:
Google:

www.class-central.com - 頁面信息

標題:
Class Central • #1 Search Engine for Free Online Courses & MOOCs
Meta 關鍵詞:
未知
Meta 描述信息:
Love to learn? Discover thousands of FREE online courses and MOOCs from top universities and companies on Class Central.
H1:
Make Informed Online Learning Decisions.

www.class-central.com - 建站技術

服務器:
nginx
SSL 安全:
不可用
robots.txt:
不可用
XML 站點地圖:
不可用
Gzip 壓縮:
有效
favicon.ico:
不可用

www.class-central.com - HTTP Head 分析

HTTP 協議採用了請求與響​​應模型,通過HTTP Header 定義了HTTP 傳輸過程中的必要參數。瀏覽器(例如​​Internet Explorer, Google Chrome, Firefox 等)並不會顯示HTTP header 字段的內容,下面是網站www.class-central.com 的HTTP header 信息:
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sun, 31 May 2020 13:48:16 GMT
Content-Type: text/html
Content-Length: 162
Connection: keep-alive
Location: https://classcentral.com/

HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sun, 31 May 2020 13:48:16 GMT
Content-Type: text/html
Content-Length: 162
Connection: keep-alive
Location: https://www.classcentral.com/

HTTP/1.1 200 OK
Server: nginx
Content-Type: text/html; charset=UTF-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
Set-Cookie: PHPSESSID=31e6170dab4335f5f1e0ace336e190d3; expires=Wed, 03-Jun-2020 01:48:17 GMT; Max-Age=216000; path=/; HttpOnly
Cache-Control: max-age=0, must-revalidate, private
Date: Sun, 31 May 2020 13:48:17 GMT
Expires: Sun, 31 May 2020 13:48:17 GMT
Strict-Transport-Security: max-age=31536000; includeSubDomains; preload;
X-Xss-Protection: 1; mode=block
X-Content-Type-Options: nosniff
X-Frame-Options: sameorigin
Content-Encoding: gzip

www.class-central.com - DNS 記錄分析

DNS 域名系統(Domain Name System,縮寫)是Internet 的一項基礎服務。它作為將域名和 IP 位址相互映射的一個分佈式數據庫,能夠使人更方便的訪問互聯網。 class-central.com 當前共有 15 項 DNS 記錄。
主機 類型 IP/目標 TTL 擴充資訊
class-central.comA1800
class-central.comMX1800pri: 30
class-central.comMX1800pri: 30
class-central.comMX1800pri: 20
class-central.comMX1800pri: 30
class-central.comMX1800pri: 30
class-central.comMX1800pri: 10
class-central.comMX1800pri: 20
class-central.comNS1800
class-central.comNS1800
class-central.comNS1800
class-central.comNS1800
class-central.comNS1800
class-central.comSOA3601expire: 604800
serial: 2015072202
class-central.comTXT
google-site-verification=5axfzDdtPxEViLntMS7hz0F7MzsfILnZfrKIafLPC-c
1800