A good website---Definitions for thousands of the most current IT-related words

Today  I find a good website named Whatis?com.  Here you can find any IT-related words' definition.

In fact I am not very clear the definication of HTTPs.I just know it's a secure version of HTTP,the communication protocol of the World Wide Web.Then I get the detail of the protocol in the site.

---

HTTPS (Hypertext Transfer Protocol over Secure Socket Layer, or HTTP over SSL) is a Web protocol developed by Netscape and built into its browser that encrypts and decrypts user page requests as well as the pages that are returned by the Web server. HTTPS is really just the use of Netscape's Secure Socket Layer (SSL) as a sublayer under its regular HTTP application layering. (HTTPS uses port 443 instead of HTTP port 80 in its interactions with the lower layer, TCP/IP.) SSL uses a 40-bit key size for the RC4 stream encryption algorithm, which is considered an adequate degree of encryption for commercial exchange.

Suppose you use a Netscape browser to visit a Web site to view their online catalog. When you're ready to order, you will be given a Web page order form with a Uniform Resource Locator (URL) that starts with https://. When you click "Send," to send the page back to the catalog retailer, your browser's HTTPS layer will encrypt it. The acknowledgement you receive from the server will also travel in encrypted form, arrive with an https:// URL, and be decrypted for you by your browser's HTTPS sublayer.

HTTPS and SSL support the use of X.509 digital certificates from the server so that, if necessary, a user can authenticate the sender. SSL is an open, nonproprietary protocol that Netscape has proposed as a standard to the World Wide Consortium (W3C). HTTPS is not to be confused with S-HTTP, a security-enhanced version of HTTP developed and proposed as a standard by EIT.

---

Again ,I realize the network's so indispensable and fundamental to our life .I cannot imange what i can do if we lose network one day.
Before several years my teacher told me the book is the sea of  knowledge and I 'd read as many books as possible.
But now I should tell my teacher the great sea of knowledge is the net,not only the books.