August 2024
Beginner
216 pages
5h 24m
English
Content preview from Exploring Computer Hardware
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Ports and Sockets
A computer on a network may send data to or receive data from multiple computers at the same time. The problem is, these computers have no way of knowing which data belongs to which application. You can identify the application using a port number.
Common application layer protocols have been assigned port numbers in the range of 1 to 1023. Some common ones are:
- HTTP is port 80
- HTTPS is port 433
- IMAP is port 143
- SMTP is port 25
These ports are assigned to specific server services by the Internet Assigned Numbers Authority (IANA) a function of ICANN.
Port 1024 to 49,151 are ports an organization can register with IANA for a particular service.
Port 49,152 to 65,535 are used by client programs to assign to connections and sessions. ...
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.