December 2019
Beginner
510 pages
12h 7m
English
Content preview from Networking Fundamentals
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Passive FTP
To avoid the potential firewall issues experienced, we can use passive FTP. In passive FTP, the client opens a random port, and the port immediately after it. For this example, let's use 2031 and 2032 again. The client connects to the FTP server on port 21 from port 2031. This connection is used for command traffic, and one of the first things the client sends is a message telling the server that it is running in passive mode. The server responds back to port 2031 on the client and provides the number of a port that the server has made available to the client. For this example, the server has stipulated port 2879. Continuing our example, on receipt of this port number, the client connects from port 2032 to port 2879 on the server. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.