I need to buy the simplest set of networking devices that provide adequate security
which community would be able to give insight into which devices i should buy or which concepts need to be available on the network to accomplish adequate security
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In theory such questions can go Hardware Recommendations but not the one you ask here, in this exact form.
In general recommendation questions (also known as shopping questions) are off-topic across the Stack Exchange network. More often then not these questions attract spam or low quality contributions that no-one is helped with now, let alone future visitors.
For that reason the two sites that do take recommendation question have invested in a strict quality model for questions, so that the answers have value for you and others.
From the help center of Hardware Recommendations:
Your question on Hardware Recommendations should:
Clearly define requirements - Objectively define what the hardware must do and must not do. e.g., "must be less than $100" is good; "must be cheap" is bad). Include optional requirements, if any.
Show previous research - Tell us what products you are aware of that do not meet your needs. Otherwise, you may get those products as recommendations, wasting your time and ours.
Provide relevant details in the question - Links are useful for supporting your information but visiting them should not be required to answer effectively, in case they stop working.
Include a good title - Briefly summarize your goal in a few words and mention only one or two of the most important requirements (e.g., "25-inch monitor under $150"). See "How do I write a good title" for more tips.
Make use of tags - Tags help sort questions. Use them to categorize your question and narrow the scope of your request. Avoid using too-broad tags on their own.
Have a narrow scope - Only ask for one piece of hardware at a time and focus on what you need from that item. If you need multiple items, ask more than one question.
So your first task is now to write a question that adhere to the above guideline and only after achieving that, consider posting.