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<v ->In this section, we're going to discuss perimeter security.</v>



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Now, when we talk about perimeter security,



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we're focused on the outer layer



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of our defense-in-depth posture for our networks.



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This is the boundary



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where we segment our LAN from the WAN



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and from the Internet at large.



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When we focus on the boundary, or perimeter defenses,



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we utilize many different devices.



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In this section, you're going to learn all about firewalls,



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proxy servers, honey pots and honey nets,



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data loss prevention systems,



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network intrusion detection systems



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and network intrusion prevention systems,



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and combination devices,



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like a unified threat management system, or UTM.



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A lot of this is going to be a review



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from your Network+ studies,



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so we're going to cover this section fairly quickly,



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pointing out the things you need to know



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for the Security+ exam.



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So, let's get started with our exploration



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of perimeter security devices.