Web Servers Overview

Video Activity
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Time
21 hours 25 minutes
Difficulty
Intermediate
CEU/CPE
21
Video Transcription
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>> Hello, Cybrarians. Welcome back to
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the Linux plus course here at Cybrary.
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I'm your instructor, [inaudible].
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In today's lesson, we're going to do
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a web server overview.
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Upon completion of this lesson,
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you're going to be able to understand
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the web server role,
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and we'll also explain at
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a high level how web servers operate.
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The majority of websites are
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>> hosted on Linux web servers,
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>> and there are two major flavors of
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the web services role in Linux.
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The first is Apache, sometimes called httpd.
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This was released in 1995 and it was
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developed by the National
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Center for Supercomputing Applications,
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NCSA, at the University of Illinois.
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Then there's NGINX,
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sometimes styled as Engine-X with a capital X.
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This was released in 2004 and it is pronounced NGINX.
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It was designed to replace Apache,
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and so it can also act as a proxy or a load balancer.
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Now, remember this about web servers for the exam,
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web servers communicate over Port 80,
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which is HTTP that's unsecure,
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or Port 443, which is HTTPS, which is secure.
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It uses SSL or TLS
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certificates to secure the connection.
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A web server really just returns a request from
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a web client of data, usually a file.
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A client will go to a URL,
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they're going to enter a website
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>> address into a browser,
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>> then they're going to send a client request for
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files via in HTTP request to the web server.
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Then the server returns that HTTP response with
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the file or it just returns a 404 error.
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But with that, we've reached the end of this lesson.
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In this lesson, we covered
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the web server role in Linux,
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and at a very high level,
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we talked about the basics of how web servers operate.
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Thanks so much for being here and I look
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forward to seeing you in the next lesson.
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