Introduction to Web Technologies

client contacts a web server and requests information or resources. The web server locates and then sends the information to the web browser, which displays the results. When web browsers contact servers, they’re asking to be sent pages built with Hypertext Markup Language (HTML). Browsers interpret those pages and display them on your computer. An HTTP cookie (web cookie, browser cookie) is a small piece of data that a server sends to the user's web browser. The browser may store it and send it back with later requests to the same server. Typically, it's used to tell if two requests came from the same browser — keeping a user logged-in, for example. A protocol is a set of rules that we use for specific purposes. In the current scenario, when we are talking about protocols, it is about communication—the way we talk to each other. Browsers also implement a prefix javascript: that to a parser is just like any other URI. Internally, the browser sees that the specified protocol is javascript, treats the rest of the string as a JavaScript application which is then executed, and uses the resulting string as the new page.

Chrome 86 hides protocol and www in address bar by default

To make configuring the proxy settings for WinHTTP-based applications easier, WinHTTP now implements the Web Proxy Auto-Discovery (WPAD) protocol, often referred to as autoproxy. This is the same protocol that web browsers implement to automatically discover the proxy configuration without requiring an end-user to specify a proxy server manually. 1. List the four layers of the protocol stack used when an email client requests email over the Internet? 2. What protocol does a web browser normally use? 3. At which TCP/IP layer does a web browser work? 4. When more than one application is running on a server, how does IP know which service should be presented a data packet? 5. INTERNET AND THE WEB As you might notice, when we browse the Web with a Web browser, we usually use the domain name to reach a website. Does that mean the Internet and the Web are the same thing?

One of the most commonly used services on the Internet is the World Wide Web (WWW). The application protocol that makes the web work is Hypertext Transfer Protocol or HTTP. Do not confuse this with the Hypertext Markup Language (HTML). HTML is the language used to write web pages. HTTP is the protocol that web browsers and web servers use to

May 25, 2020 What is SSL/TLS and HTTPS? The Importance of a Secure Web Mar 23, 2020 Stop Using SSL 3.0! - NYSTEC TLS provides a way for web servers to support older web browsers by changing (or downgrading) the security protocol from the new TTL to the older SSL protocol. Since SSL evolved into TLS, we often use one term to describe the other. The evolution of the SSL/TLS protocol looks like this: SSL 2.0 → SSL 3.0 →TLS 1.0 →TLS 1.1 →TLS 1.2