Hello, I have to write a paper on the topic of network instrusion detection.  I have some questions on how to get started with some sections of my paper.  resources and or references is a plus! there's so much info out there! 1. how is IDS part of a larger defense in depth strategy? 2. who are some of the larger players in the space, both commercial and open source? 3. how would you implent and IDS on a network if you needed to? Any help, sites, sources are much appreciated!

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VLAN

VLAN stands for Virtual Local Area Network, and it is created from one or more local area networks. A Virtual Local Area Network (VLAN) is a customized network made up of one or more LANs. It allows a set of devices from different networks to be converted into a single logical network. As a result, a virtual LAN that is managed similarly to a physical LAN emerges.