June 2010
Intermediate to advanced
224 pages
5h 18m
English
Content preview from Network Flow AnalysisBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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ICMP Types and Codes and Flow Records
Flow records also record ICMP types and codes, displaying them as destination port numbers. I'll review ICMP types and codes first and then discuss how flow records portray them.
Types and Codes in ICMP
Many people mentally pour the different ICMP requests into one large bucket and get by on generalizations such as "ICMP is ping." Although this might be fine for average users, you're not an average user, and you need a deeper understanding of ICMP to manage a network.
An ICMP type is a general class of ICMP request, such as ping requests and ping replies. Other ICMP types include messages such as "host unreachable," routing advertisements, traceroute requests, routing redirects, and so on. Some ICMP types prompt ...
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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.