May 2009
Intermediate to advanced
882 pages
22h 55m
English
Content preview from Cisco® Network Professional's: Advanced Internetworking Guide
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14.1. Introduction to Layer 2 Security
If you think about how networking equipment is configured when you buy it nowadays, you can very clearly see that far lower security settings are configured by default on equipment that is used inside your enterprise. External protection devices, such as firewalls, come almost completely secured. Only traffic that you specifically authorize and configure is allowed. Granted, for a long time, the primary thoughts about routers and switches has been that they are for internal communication, and provide an efficient (or fast as possible) delivery to enterprise traffic. With almost no security configuration, those devices are open targets for attack. Unfortunately, a Layer 2 network that is compromised can ...
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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.