February 2018
Beginner
290 pages
7h 28m
English
Content preview from Hybrid Cloud for Architects
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TCP/UDP monitoring
The TCP/UDP monitoring is a little more advanced than the simple ICMP echo that we saw in the previous section. In this, a connection is sent to a port on the network stack and checked to see whether the port is opened.
A network port is nothing more than a memory buffer associated with a number in the network stack. Once an application needs to listen for the network traffic, it makes a call to the operating system kernel, for a number and a memory location.
The kernel assigns the number and memory location and also makes the TCP/IP stack aware of it. Once someone sends a packet to that port, the TCP/IP stack traversing through various layers gets the segment and puts it on the memory location.
It then becomes the application's ...
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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.