May 2001
Intermediate to advanced
528 pages
12h 59m
English
Content preview from Cisco® Secure Internet Security Solutions
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Frequently Asked Questions
| Question: | What is intrusion detection? |
| Answer: | Intrusion detection is the passive monitoring of the traffic flow on a network segment to detect any suspicious activity on the network. Once a problem is identified, an intrusion detection system can take action against the session to ensure that it is not maintained. |
| Question: | I already have a firewall; why do I need intrusion detection as well? |
| Answer: | A firewall is a device that can protect internal networks from external threats by providing address translation and stateful inspection of traffic flow. The firewall does not have the intelligence by default to know whether the packet flow through the firewall represents genuine traffic or an attempted attack that is hiding ... |
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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.